Does anyone know if there are videos showing you step by step how to actually setup a rom, once u have it installed? Last night I installed the sleeper rom, and I couldn't figure out how to get the phone dialer installed. Plus I started getting system force closes. I'm assuming that I should install the zip twice or 3 times right? But really, videos on rom setup would really help.
Sent from my SPH-D700 using xda premium
There are some videos listed in the OP of SleeperROM but doubt it will cover what you are looking for. Replacing the dialer requires pushing the file to system\app folder with Root Explorer. FC's are a sign of corrupted data. A Factory Data reset will clear all data and you can then restore some stuff from Titanium if you had a backup before flashing. Try to not restore data for anything unless you HAVE to have it, like memos or something like that.
so in that case, you think i should do a dalvik wipe, cache wipe and a factory reset before installing the sleeper rom?
by the way, what do you me "op"?
androidmaster1 said:
so in that case, you think i should do a dalvik wipe, cache wipe and a factory reset before installing the sleeper rom?
by the way, what do you me "op"?
Click to expand...
Click to collapse
OP=Original Post which is Post #1 of the thread. I also read in there that it does not preserve data and you should do a full wipe of all 3 things before flashing for best results.
OP = original post (or first post). Yes, wipe everything before installing a ROM.
Edit: before installing most ROMs. Some of them are no-wipe, but i usually wipe anyway.
Sent from my SPH-D700 using XDA App
ok...i got it. now, if and when i reinstall the rom, would there be a problem installing the dialer from titanium backup? would there be any kind of conflict?
androidmaster1 said:
ok...i got it. now, if and when i reinstall the rom, would there be a problem installing the dialer from titanium backup? would there be any kind of conflict?
Click to expand...
Click to collapse
There shouldn't be. Sometimes Titanium is finicky about pushing system apps, but worth a try. If not pull it from a stock ROM and push it with Root Explorer.
Related
Whay exactly does a full wipe consist of? Using RA 2.3 recovery.
I usually wipe system, cache, and dalvik that way I keep all my dl app but some wipe data also. U can wipe boot as well.
[email protected] said:
Whay exactly does a full wipe consist of? Using RA 2.3 recovery.
Click to expand...
Click to collapse
A full wipe, in preparation to flash a new rom would consist of wiping:
data/factory reset
cache
dalvik cache
boot
system
I always wipe everything 2 or 3 times. I also flash Calkulin's Format All after wiping all of the above. That might be overkill, but it makes me feel better before I flash a rom, lol. You get a completely clean start.
k2buckley said:
A full wipe, in preparation to flash a new rom would consist of wiping:
data/factory reset
cache
dalvik cache
boot
system
I always wipe everything 2 or 3 times. I also flash Calkulin's Format All after wiping all of the above. That might be overkill, but it makes me feel better before I flash a rom, lol. You get a completely clean start.
Click to expand...
Click to collapse
What would happen if i wiped everything and rebooted? not that i wanna try it or anything just curious
My definition of a full wipe using amon RA is EVERYTHING in the wipe menu except the SD card and when I flash a different rom, I wipe everything on that list with the exception of the card itself. Technically speaking, however, the list that k2buckley posted is correct.
posting & replying via the XDA Premium app.
[email protected] said:
What would happen if i wiped everything and rebooted? not that i wanna try it or anything just curious
Click to expand...
Click to collapse
If you tried to boot after wiping what I mentioned, you will either hang at the splash screen or it will boot you right to fastboot (not sure really though, as I've never tried, but it wouldn't boot, for sure). Since it wipes system and boot image, there would be nothing installed for you to boot into. Btw, I would avoid trying that lol.
Sent from my PC36100 using XDA App
k2buckley said:
If you tried to boot after wiping what I mentioned, you will either hang at the splash screen or it will boot you right to fastboot (not sure really though, as I've never tried, but it wouldn't boot, for sure). Since it wipes system and boot image, there would be nothing installed for you to boot into. Btw, I would avoid trying that lol.
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
+1........(laughing)
posting & replying via the XDA Premium app.
dougjamal said:
My definition of a full wipe using amon RA is EVERYTHING in the wipe menu except the SD card and when I flash a different rom, I wipe everything on that list with the exception of the card itself. Technically speaking, however, the list that k2buckley posted is correct.
posting & replying via the XDA Premium app.
Click to expand...
Click to collapse
That's crazy. Wiping everything like that is over kill. No need to wipe data as its all the apps that uve downloaded from the market. The only ones really needed are dalvik, cache, boot, and system. And I've only ever had to do it one time then flash a rom and it works everytime plus I have all my data and apps there still
Papa Smurf151 said:
That's crazy. Wiping everything like that is over kill. No need to wipe data as its all the apps that uve downloaded from the market. The only ones really needed are dalvik, cache, boot, and system. And I've only ever had to do it one time then flash a rom and it works everytime plus I have all my data and apps there still
Click to expand...
Click to collapse
He asked what a FULL wipe was. Not if it was necessary or required. And not wiping data when going from one rom to a different one (not an update of the same rom, but to a totally different rom) has ALWAYS left me with weird issues, such as wake locks, cm Widgets on salvage mod, reboots etc.
Oh well, we all have our own methods and rituals for flashing, lol. I will stick to my methods, and everyone else can use theirs.
Sent from my PC36100 using XDA App
Papa Smurf151 said:
That's crazy. Wiping everything like that is over kill. No need to wipe data as its all the apps that uve downloaded from the market. The only ones really needed are dalvik, cache, boot, and system. And I've only ever had to do it one time then flash a rom and it works everytime plus I have all my data and apps there still
Click to expand...
Click to collapse
It may very well be overkill, however, that is my method and it has served me well and has saved me a great deal of unnecessary troubleshooting. But hey, to each his or her own, right? Take care and enjoy the rest of your night....
posting & replying via the XDA Premium app.
k2buckley said:
.....And not wiping data when going from one rom to a different one (not an update of the same rom, but to a totally different rom) has ALWAYS left me with weird issues, such as wake locks, cm Widgets on salvage mod, reboots etc......
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
Same here, my friend.........and when I change roms, I don't want any remnants of the previous one.
posting & replying via the XDA Premium app.
dougjamal said:
Same here, my friend.........and when I change roms, I don't want any remnants of the previous one.
posting & replying via the XDA Premium app.
Click to expand...
Click to collapse
I agree as well; I only restore my apps with data and my launcher settings, [person preference].
teh roxxorz said:
I agree as well; I only restore my apps with data and my launcher settings, [person preference].
Click to expand...
Click to collapse
I'm guessing u know this but have u ever looked at ur data folder with root exployer or what ever. The app folder might have 5-6 apps in it and the app-private folder holds the apps u dl from market. So wiping it in recovery makes little sense. I've flashed plenty of different roms without wiping data and never had a problem. Plus on an upnote all ihave to do is flash the roms and gapps if needed and restart and that's it. No need to sit there for an hour restoring apps or settings
Papa Smurf151 said:
I'm guessing u know this but have u ever looked at ur data folder with root exployer or what ever.
Click to expand...
Click to collapse
Yes, i have.
The app folder might have 5-6 apps in it and the app-private folder holds the apps u dl from market.
Click to expand...
Click to collapse
Not with my current setup. My data/apps/ folder contains ALL of my 3rd party apps except Anfry Birds Rio and my app-private folder is empty.
So wiping it in recovery makes little sense.
Click to expand...
Click to collapse
Yes and No.
I've flashed plenty of different roms without wiping data and never had a problem.
Click to expand...
Click to collapse
I believe you and don't have a problem with you doing it that way, however, like you, I, too, have flashed a great deal of roms and my method has also served me well. It is not wrong for me to use my method. It's just a matter of preference and nothing more.
Plus on an upnote all ihave to do is flash the roms and gapps if needed and restart and that's it. No need to sit there for an hour restoring apps or settings
Click to expand...
Click to collapse
I understand, but, I do not sit for hours restoring my apps. My apps are restored within minutes. Anyway, I appreciate your viewpoint. Take care and have a great night.....
posting & replying via the XDA Premium app.
Hi, I received a Samsung I9000. Would not go past "s".
Used odin to flash to Gingerbread- still would not boot. Flashed to stock 2.2.1.
Takes long to boot, then force close keeps on popping up for all applications installed. After startup, I noticed the same user data and applications on phone. I tried *2767*3855#. No luck. Booted into recovery and wiped cache and formatted, no luck. What else can I do?
This thread doesn't belongs here! Please mods. Move it!
Sent from my GT-I9000 using XDA Premium App
wynsak said:
Hi, I received a Samsung I9000. Would not go past "s".
Used odin to flash to Gingerbread- still would not boot. Flashed to stock 2.2.1.
Takes long to boot, then force close keeps on popping up for all applications installed. After startup, I noticed the same user data and applications on phone. I tried *2767*3855#. No luck. Booted into recovery and wiped cache and formatted, no luck. What else can I do?
Click to expand...
Click to collapse
AFAIK as long as you still notice same user data on phone, you won't get any luck repairing force closes.
Try to wipe data/factory reset first, then do flash any stock Gingerbread with repartition checked using Odin.
After that, you should have a clean ROM without FC.
Then it is best to redownload your installed apps from market.
If you would like to restore your apps using Titanium Backup try just to restore app only (without data).
Good luck and cheers...
Sent from my GT-I9000 using xda premium
TerraBuzz said:
AFAIK as long as you still notice same user data on phone, you won't get any luck repairing force closes.
Try to wipe data/factory reset first, then do flash any stock Gingerbread with repartition checked using Odin.
After that, you should have a clean ROM without FC.
Then it is best to redownload your installed apps from market.
If you would like to restore your apps using Titanium Backup try just to restore app only (without data).
Good luck and cheers...
Sent from my GT-I9000 using xda premium
Click to expand...
Click to collapse
and also try to format the internal SD memory for more clean rom flash...
but dont forget to backup it 1st...
I have the same problem ,, the problem is that the internal memory won't format on any way or another ,, I used alot of methods to format it but nothing change .. I still able to read my memory and copy whatever I want but not able to remove anything or make any changes ,,,,,,,,,,, sorry for my bad english
Here is the deal, I have flashed everything out there, and then some. Batt life is down from when I first got it and now I am running into issues when I flash certain Roms. One rom I have flashed previously, now I cant open or access messaging. Another Rom gives me boot loops, while no one else seems to have any issues. I think I now have little gremlins in my phone. ok maybe it is just bits and pieces of code remaining behind, but regardless I really want to just wipe everything and start fresh. Do I hear people yelling Odin??? I have tried that. Back in my vibrant days, we had .pit files that seemed to do that. I only have found .tar files for the S3, dont know if that even matters. Do I re-partition? Did a little research and read that might brick my my ****. when I do odin my phone it seems like it doesnt work, if i am running wicked red rom everything is still red in the status bar, is that normal after odin, it states pass.
Do you wipe everything when you flash? Maybe try that with a fresh install? I use titanium backup and restore apps and data that I need. I've also been running SD maid which helps clean up duplicate files and crap that I don't need. I'm very new to this so I am sure there will be better advice.
Sent from my SGH-T999 using xda app-developers app
Yeah, I usually factory reset x3, then wipe cache partition x3, then wipe davlik cache x3, and finally format system x3. I have read the x3 helps, not really sure if it is necessary or not. Seems to me that a data wipe either happens or it doesnt so should wipe on 1 try but have read multiple peeps stating that wiping 3x's helps.
http://forum.xda-developers.com/showthread.php?t=1737855 odin back to stock
deeznutz1977 said:
http://forum.xda-developers.com/showthread.php?t=1737855 odin back to stock
Click to expand...
Click to collapse
If you Odin back to stock, do you lose everything? Nandroids? will you lose data in titanium? I have over 6gb of crap on my phone. Seems to be a bit high.
Sent from my SGH-T999 using xda app-developers app
Ok I odin'd to stock LH2 and it is weird. My status bar is stock, my wallpaper is what I had been using, I have titanium and SU on my app drawer but I am not rooted. Facebook pulled right up no restore or login. I also have a double boot animation, I get a brief circular samsung and then a partial tmobile boot. Seems like I still have stuff left behind??? And no I did not lose my data on internal SD. I still have songs and Roms.
feckmu said:
Ok I odin'd to stock LH2 and it is weird. My status bar is stock, my wallpaper is what I had been using, I have titanium and SU on my app drawer but I am not rooted. Facebook pulled right up no restore or login. I also have a double boot animation, I get a brief circular samsung and then a partial tmobile boot. Seems like I still have stuff left behind??? And no I did not lose my data on internal SD. I still have songs and Roms.
Click to expand...
Click to collapse
Before or After you ODIN back to stock, you NEED to do a factory data wipe in recovery prior to first boot. You will lose internal SD< so back it up to your PC now and do it all over again
It seems that you didn't factory reset first somehow, ie. didn't wipe data, so all that stuff stayed.....
Sent from my SGH-T999 using xda app-developers app
Thanks guys, The factory reset was it, I forgot that was even there, and assumed when I used Odin it should have done it.
Sorry if it's a repost but I am trying to upgrade from T999UVLH3 to T999UVDLI3 but it fails as I have to go back to stock. What is the recommended way to downgrade to ICS from JB without wiping everything on my phone? or is there none? From what my search has resulted till now I will have to wipe everything, but i thought ill just confirm.
If i have to wipe everything then can i just use kies to do factory restore? I am using Mybackup to back everything up.
You really should be wiping everything every time you flash something.....
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2
pradyots said:
Sorry if it's a repost but I am trying to upgrade from T999UVLH3 to T999UVDLI3 but it fails as I have to go back to stock. What is the recommended way to downgrade to ICS from JB without wiping everything on my phone? or is there none? From what my search has resulted till now I will have to wipe everything, but i thought ill just confirm.
If i have to wipe everything then can i just use kies to do factory restore? I am using Mybackup to back everything up.
Click to expand...
Click to collapse
You could try just wiping the system.
If it doesn't work, then you will need a complete wipe. Question - did you have any complete nandroid backups
gaww said:
You could try just wiping the system.
If it doesn't work, then you will need a complete wipe. Question - did you have any complete nandroid backups
Click to expand...
Click to collapse
I used Mybackup to do a back. Is it good enuf?
Also i just read that I can't do a factory reset. I will have to download the stock rom and ODIN flash it. I am currently downloading T999UVALH2_T999TMBALH2_TMB.zip. Is this a correct stock rom?
pradyots said:
I used Mybackup to do a back. Is it good enuf?
Also i just read that I can't do a factory reset. I will have to download the stock rom and ODIN flash it. I am currently downloadingT999UVALH2_T999TMBALH2_TMB.zip. Is this a correct stock rom?
Click to expand...
Click to collapse
Im having the same problem but Idk what flashing through odin means? I havnt flashed anything since Windows mobile except at the bar a few times when I was drunk lol. So my question is how do you I flash through odin.
pradyots said:
Sorry if it's a repost but I am trying to upgrade from T999UVLH3 to T999UVDLI3 but it fails as I have to go back to stock. What is the recommended way to downgrade to ICS from JB without wiping everything on my phone? or is there none? From what my search has resulted till now I will have to wipe everything, but i thought ill just confirm.
If i have to wipe everything then can i just use kies to do factory restore? I am using Mybackup to back everything up.
Click to expand...
Click to collapse
do a titanium back up?
racemepls said:
Im having the same problem but Idk what flashing through odin means? I havnt flashed anything since Windows mobile except at the bar a few times when I was drunk lol. So my question is how do you I flash through odin.
Click to expand...
Click to collapse
Don't want to sound rude in anyway but you really need to just put your phone down and do some reading. Or you are going to end up with a really exspensive paper weight. If you have not even heard of odin you should not be messing wihmth any modems or radios because the wrong modem will brick the **** out of that shiny new SIII. Like I said no disrespect and we were all new at this at one point. But just take some time and do some reading. Google can be your best friend and the more you learn the more you will end up getting out of your device
sent via galaxy s3 in boss mode @2.1ghz
Here is a link to a helpful post on downgrading: http://forum.xda-developers.com/showpost.php?p=30666949&postcount=135
Follow those steps and you should be good.
I flashed DLI3 right on top of LH3 using mobile Odin without wiping anything except Dalvik.
android.process.media started crashing after the reboot, but clearing cache and data for media storage took care of that.
carrrnuttt said:
I flashed DLI3 right on top of LH3 using mobile Odin without wiping anything except Dalvik.
android.process.media started crashing after the reboot, but clearing cache and data for media storage took care of that.
Click to expand...
Click to collapse
I did that too but when it was crashing this idea didnt occur to me. So i flashed stock on top of it. Now its stuck on "FIRMWARE UPGRADE ENCOUNTERED AN ISSUE", kinda bricked. What do i do?
Try to boot back into download mode and odin back to stock.
There really is a reason these updates have to be applied a certain way. Sorry you had to find out one of them. Shortcuts CAN brick your device!
11 Years Ago Today...
WE WILL NEVER FORGET!!!
GOD BLESS AMERICA!!!
carrrnuttt said:
I flashed DLI3 right on top of LH3 using mobile Odin without wiping anything except Dalvik.
android.process.media started crashing after the reboot, but clearing cache and data for media storage took care of that.
Click to expand...
Click to collapse
ok im at this stage now... and its crashing like crazy. How do i clear cache and stuff? is it in recovery mode?\
pradyots said:
ok im at this stage now... and its crashing like crazy. How do i clear cache and stuff? is it in recovery mode?\
Click to expand...
Click to collapse
Look for "Media Storage" in the Applications manager list within System Settings. It will be under the "ALL" tab. Force Stop it then clear data and cache. If that doesn't fix it, disable it completely. You can tell that everything's been fixed if you open your Play Store without triggering a crash. Once it's fixed, you'll need to re-enable media storage again, and reboot.
carrrnuttt said:
Look for "Media Storage" in the Applications manager list within System Settings. It will be under the "ALL" tab. Force Stop it then clear data and cache. If that doesn't fix it, disable it completely. You can tell that everything's been fixed if you open your Play Store without triggering a crash. Once it's fixed, you'll need to re-enable media storage again, and reboot.
Click to expand...
Click to collapse
Worked well but i can't root on JB now... Esignature verification failed when i try to install superuser.zip in recovery. Did u have this problem?
EDIT: Fixed it... all good. Thanks for ur help
This is something that's bothered me since upgrading to 4.1.1. Doing just what the title says. So far, I've tried clearing the dalvik cache, wiping the cache partition, uninstalling titanium backup and restarting, as well as uninstalling ROM toolbox and lucky patcher. I'm rooted with chainfire's "quick" method but I also had root before upgrading from ICS. I also tried bin4ry's universal ICS/Jellybean method after upgrading before finding chainfire's, witch, I am suspicious of bin4ry's causing the bug in the first place. The message shows briefly after the glowing "Samsung" boot animation. I have scoured to the bottom of the internet looking for an answer, but I really, really do not want to re-flash the stock rom again. Any reason why this happens? Any way to fix it without wiping my phone; if that works?
Sent from my SAMSUNG-SGH-I747
Sounds like it's wiping dalvik on each reboot. Wipe and re flash.
Sent from my SGH-I747 using Tapatalk 2
peneoark said:
Sounds like it's wiping dalvik on each reboot. Wipe and re flash.
Sent from my SGH-I747 using Tapatalk 2
Click to expand...
Click to collapse
Any reasons why this happens?
Mine is doing the same thing.
peneoark said:
Sounds like it's wiping dalvik on each reboot. Wipe and re flash.
Sent from my SGH-I747 using Tapatalk 2
Click to expand...
Click to collapse
It's not wiping the dalvik cache. The system displays the message briefly with no application count. I just assumed it was normal on 4.1.1
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Several people seem to claim otherwise, Google shows. My tenant's and several of my friend's phones don't do it. I'll try reverting to factory and upgrading again in a few days if there are no other solutions.
Sent from my SAMSUNG-SGH-I747
Mine showed up after the Google wallet mod. Also had it happen after removing some stock apps although I'm not sure which caused it.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
I've removed a lot of at&t's bloatware, along with S-Suggest, "help" and ypmobile. I've also frozen s-voice and the samsung keyboard in favor of SwiftKey. I've removed bloatware in both so far. Maybe once I revert, I'll try to find out more about the problem. Until my phone is sick of the cache partition wipes and ruthless dalvik cache destruction, I will continue to try in vain. For the good of my OCD.
Sent from my SAMSUNG-SGH-I747
Many ROMs and Kernels are set to ziplalign apps on boot to improve performance.
I want to say this was also implemented in stock JB, or its set in CWM's init.d script for the newer versions.
This also happens each time you wipe dalvik and/or if you have Titanium Backup set to intergrate sys dalvik into ROM
I just did the HOWTO root after upgrading to stock JB, and after reading this post I did a quick reboot and yeh, the message appears for me as well.
Never integrated sysdalvik w/ titanium backup. I've also rebooted the phone without clearing dalvik, and never had cwm. Probably a few things I should have mentioned earlier, but they never crossed my mind.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Fixed the problem. Turns out you do need to re flash the whole phone. Reset to factory in recovery, then wipe the cache AND the dalvik, then reset to stock using ODIN. IT IS IMPERATIVE THAT YOU RESET TO FACTORY. The phone will remain soft bricked otherwise. A tutorial can be found here: http://galaxys3root.com/galaxy-s3-unroot/how-to-unroot-att-galaxy-s3-sgh-i747/. The only tried and true way to get the bug out. As far as I know. If anyone has any more ideas as to how this problem occurs, I'd still like to hear them.
Sent from my rooted SAMSUNG SGH-I747. THANKS CHAINFIRE!!
I rarely reboot these days. I do my CWM backups online.
But when I do reboot, I do get that updating message and have been seening that from as far back as I can remember. It bugged me at first but not now. For me, it only does it for about 2-4secs so I don't bother trying to fix it.
I have the cause in my case but I don't have the solution. I flashed a mod I found here http://forum.xda-developers.com/showthread.php?t=2044449, apn_editor_1.1.zip. Now every reboot I get Android Is Upgrading.... Starting apps.
How do I stop the phone from trying to add this mod?
Just got the same problem. Had super SU on the phone (soft root), so i tried to fully root (i installed xblasttools, and had to flash pa-icons, so i could change the color of the battery, but i couldn't because it said signature failed). Downloaded philz kernel/root, flashed with recovery. Then i uninstalled the Super su rebooted and there it was; Andriod is upgrading ...
I'm on 4.1.2, Samsung GT-i9100. Help !
P.S Uninstalled the superuser that i got with the phil kernel and installed Super SU. Also i did wipe the davlik and cache. Same stuff.
I got the Android is upgrading message before. It was because I tried to convert a user app to a system app. Converted it back to a user app and it went away. I think it had something to do with having an apk file but no corresponding odex file for that app in /system/app
Sent from my SGH-I747M using xda app-developers app
I have found why this happens, issue is with lucky patcher, when you patch application it creates <appname.odex> this odex file is somehow diffrent than real odex, so when you wipe dalvik cache it caches all your apps and then you have Android is starting apps on each boot. The solution is to delete all apps odexes wich you patched, reboot phone, this time it will not display "android is starting apps" and will work until you delete dalvik again. It is possible to apply patch with Lucky Patcher to dalvih cache instead of creating odex, but you loose your crack when you wipe dalvik again.
This is the solution, if someone have better way of doing it post here, also sorry if thread is old.
magix01 said:
I have found why this happens, issue is with lucky patcher, when you patch application it creates <appname.odex> this odex file is somehow diffrent than real odex, so when you wipe dalvik cache it caches all your apps and then you have Android is starting apps on each boot. The solution is to delete all apps odexes wich you patched, reboot phone, this time it will not display "android is starting apps" and will work until you delete dalvik again. It is possible to apply patch with Lucky Patcher to dalvih cache instead of creating odex, but you loose your crack when you wipe dalvik again.
This is the solution, if someone have better way of doing it post here, also sorry if thread is old.
Click to expand...
Click to collapse
Thank you for pointing out Lucky Patcher. The "android is starting apps" notification started when I deodexed my rom. I uninstalled those patched apps, reinstalled and re-patched normally with Lucky Patcher 3.9.9.1 and that notification is gone.
:good:
coffee black said:
Thank you for pointing out Lucky Patcher. The "android is starting apps" notification started when I deodexed my rom. I uninstalled those patched apps, reinstalled and re-patched normally with Lucky Patcher 3.9.9.1 and that notification is gone.
:good:
Click to expand...
Click to collapse
Next time just cut odex files to other location, reboot phone and copy odexes back, this should be alot easyer
Try to reflash your rom that may help some how
Sent from my GT-I9500 using xda app-developers app