VSCO: any easy to use app with beautiful filters - great for beginners or if you want to edit quickly
Glitché: a fancy app that has features like VCR & pixelation. Great for fancier~ pics & gifs
Snapseed: great for its selective tool - you can edit specific parts of your pics, adjusting brightness, structure etc.
PicsArt: great for collages & cropping - also has many nice templates! Great for posters
Retouch: great getting things you don’t want out of the picture! Has a cloning tool too
PhotoWonder: Great for ‘beautifying’ yourself. Slim down without going to the gym 😉
Lightroom: allows you to change specific colours in your photos - making it more pink/orange/etc, catering to your feed