Use APKPure App
Get Quick Keyboard Switch old version APK for Android
Quickly switch between keyboards without interrupting what you're doing!
This simple app allows you to use a homescreen widget to quickly toggle the default keyboard from the enabled keyboards on your Android device.
It was mainly written because I need to keep switching between SwiftKey 3 and SwiftKey flow while I still get used to the latter.
PERMISSIONS
INTERNET - To display ads
VIBRATE - For widget vibration
RECEIVE BOOT COMPLETED - To start on boot