The best alternatives to Phontabulous are Crossroad, Tappy, and Year for Android. If these 3 options don't work for you, we've listed a few more alternatives below.
MooCow is a privacy-centric photo and video app that protects your personal media with a passcode or Face ID. ⠀ MooCow doesn't even connect to the internet, so you can be sure your data stays on your device and is only seen by you!