AppChecker - App & System info Mod Apk - This app shows you the TargetAPI for all of your apps.
You can check which apps are compatible with the most recent features of the Android System. You can also check the DRM status, e.g. The security level of Widevine.
New shows the AndroidManifest.xml for any app.
This app is for Android 6 Marshmallow and later. It allows you to see which apps support this new permission setting.
Androids style and behavior may evolve as new versions are made. App developers should adjust the targetSdkVersion value so that apps can take advantage of the new Android versions.