What are some alternatives?
When comparing HearSeeParty and glitchi, you can also consider the following products
Glitchatron - Destroy your favorite photos
Pixus - Pixus is an AIR pixel ruler application, a handy tool for web and interface designers.
Photomosh - Turn anything into a vaporwave
CharMap - Unicode character viewer and keyboard for iOS
MVGEN - Make your own music videos with audio, gifs, and special effects
Glitch Wizard - Create trippy glitch photos and animated GIFs