Flutter apk not installing

Question

I am unable to install my apk on an android device except only for this apk. I am using the flutter build apk command to generate apk. After sharing apk to some device it was getting app not installed as shown in this..

I am using VSCode and here I am sharing the flutter doctor

Doctor summary (to see all details, run flutter doctor -v):
    [√] Flutter (Channel stable, 2.8.1, on Microsoft Windows [Version 10.0.19043.1466], locale en-US)
    [√] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
    [√] Chrome - develop for the web
    [√] Android Studio (version 2020.3)
    [√] VS Code (version 1.63.2)
    [√] Connected device (3 available)

Other apk's are working fine except this one on my device.

Answer 1

This type of issue is occur when you transfer apk file directly via any messaging platform or USB ... Some time it will happen and apk file will corrupt.. So I suggest to create a link for distribution of your app..

You can upload your apk in Google drive or use Firebase App Distribution or just WeTransfer. And Generate the link and then transfer that link....