Here are some great tattoo designs app available on the playstore and Apple store for free. Both of these apps have great star ratings/reviws, and over 1 million downloads. Both apps are made by Skol Labs LLC.
Tattoo Designs app for Android and iOS
Inspiring tattoo designs for you! 1000’s of the best tattoo designs from around the world! https://play.google.com/store/apps/details?id=com.skollabs.tattoo https://itunes.apple.com/us/app/tattoo-designs!/id561830940?mt=8