I recently got a HTC One M9, and I wanted to replace it's gallery with my old phone's gallery because I loved one of the filters that it had. This led to me having to download a third party APK file, but when I tried to install it, it just gave me an error that said "App not installed." I first thought it's because it won't install because the current gallery is still on my phone, but after disabling the app, I still get the error message. Is there any way I can fix this?
The APK file is MIUI's Gallery app if that helps.