This app was mentioned in 5 comments, with an average of 1.00 upvote
After reading some other post about people getting shadowbans and what not I feel I should point out I was using GoIV not IV GO. From what I have read IV GO requires you to log in and and definitely breaks the TOS. GoIV doesn't interact with PokemonGo or its servers, just takes screenshots and calculates from those.
I use IV Go (Android) on my phone: https://play.google.com/store/apps/details?id=com.orangefish.app.pokemoniv&hl=en Not only does it have IVs, but also info about movesets, what cp the evolved form of that pokemon would make, and the ability to search all your pokemon. It does require you to login to your account for pokemon go so that it can pull all the data.
https://pokeassistant.com/main/ivcalculator is a solid web calculator if you are more comfortable using something online that doesn't actually access your account. They have an app as well now, but for some reason I can't find it in the play store at the moment.
When you say GoIV do you mean IV go?
When I search with the image I get https://play.google.com/store/apps/details?id=com.orangefish.app.pokemoniv But don''t know for sure :-)