Ditty allows you to choose a song, like a pop song, a nursery rhyme, or even the batman theme, and type in text. It then sings it to you in that tune and allows you to add photos, gifs and videos to it. You then post them for people to see. Simply the best.
This app would be good for children if it was censored for children.
You can put any text in these videos, although some words might be censored algorithmically. The hashtags are not filtered. I was on for 2 minutes and found videos depicting violence against minorities, gross sexual content, drug use, and abuse. Should be 18+, if it is not going to be properly censored.