INSTALL_FAILED_UPDATE_INCOMPATIBLE when I try to install compiled .apk on device

Question

it means the application which you want to install is already installed. just remove the old one and try again.

Try

adb uninstall package-name

It works for me. I have remove my app using Titanium Backup. However,I think Titanium backup didn't removed my app totally.

Uninstalling the application would be enough to avoid this problem.

INSTALL_FAILED_UPDATE_INCOMPATIBLE

but sometimes even uninstalling the message is raised again, it occurs in Android OS 5.0 +, so this is the solution:

Go to Settings > Apps and you will find your app with the message:

"Not installed for this user"

We have to uninstall manually for all users!, then we can install our compiled application with no problems.

Another options:

• Remove the old application and install again.

• Use Android Debug Bridge command:

  adb uninstall [PACKAGE NAME]

Two ways that can be works

1: Uninstall app from mobile device manually

2: Open command prompt , trace path of adband execute following command

adb uninstall your_package_name

1. go to : your adb folder \sdk\platform-tools\
2. type cmd
3. type : adb remount on command window
4. adb shell
5. su
6. rm /system/app/YourApp.apk
7. Restart your device

The question was why he's getting this error. Uninstalling will solve this problem but in my case, while I was installing the compiled version of the apk, the problem raised. I was trying to build an update for my application. So what I did, I built a signed apk and then tried to install the apk and the apk installed perfectly. So, rather removing the old apk, I had to sign the newer update and then installed it.

This maybe because you have more than one user in your device and you've just deleted the app on one (leaving the apk still present for the other(s)).

I've deleted in all accounts, and it worked afterwards.