I haven’t made any suggestions for ages because I felt like the app was so well developed already it didn’t need anything and it was just selfish to ask for more. And this request is a little selfish but still worth throwing out there just in case 😆. Have you thought of adding a feature to add pinyin or furigana the same way you do Google translate? So you could add an option for side 2 maybe to be pinyin or furigana and it uses side 1 as a source. I don’t know if there any websites or online services that provide this sort of function so app authors like yourself and just send text to them and then they’ll spit out the results that would made this not too terrible to implement.
I love using the app to mine vocabulary and phrases and if the app were able to add the pronunciation quickly and easily the way it adds Google translations that would be really useful.