This app was mentioned in 3 comments, with an average of 0.67 upvotes
I made this app to help with my Spanish learning: https://play.google.com/store/apps/details?id=cdudigital.com.conjugator.free
I created the Android app for exactly this objective: https://play.google.com/store/apps/details?id=cdudigital.com.conjugator.free
Also a web app: http://www.verbsandtenses.com
I created http://www.verbsandtenses.com to help me with my conjugation. Also in the Google Play store: https://play.google.com/store/apps/details?id=cdudigital.com.conjugator.free