What app do Android Users use to check IVs

Most people use either Calcy IV or PokeGenie. Both are very similar in basic IV-checking functionality but Calcy offers a few extra features and I prefer it as a result.

Regardless of which one you choose, you're looking at a few seconds per mon to get a rating.

Calcy IV works great. Used it last month and got 3 90+ Charizards with BB.

CalcyIV for me also. With ingame appraisal I can go through 10-12 mons per minute, with calcy I can double it (not counting the time to mass transfer after appraising).

If you want ultimate speed though, consider using the search strings in this thread: https://www.reddit.com/r/TheSilphRoad/comments/8qie0h/search_codes_larvitar_community_day/

I use both CalcyIV and Pokegenie...why restrict yourself to just one when they''re both free?