Very cool app. Chess.com costs too much and lichess is rather ugly and has barebones puzzle support. I like how you can choose different categories. Will be using this from now on. Btw you have "Egnlish Opening" misspelled.

For tactics I really like chesstempo.com. It has free, unlimited puzzles. It is to my mind superior for tactics training. It also has a comments feature which I really like.

Try lichess' beta app, it's much more user friendly, even if it's missing a couple of features.

Thanks for your generous reply and Oh my god how did I miss that, will fix in the next update.