You can see possible IV ranges and catch probabilities before you even catch the Pokémon.
You can find the official app on the Apple App Store under the name App Store Link: Download on the App Store
The app generates customizable nicknames based on stats, which can be pasted directly into Pokémon GO for easy sorting. Calcy IV vs. Top iOS Alternatives
It works on iPhone, iPad, iPod touch, and even Apple Vision Pro (requires visionOS 1.0 or later). Key Features of Calcy IV on iOS
Unlike older methods that required manual screenshots, Calcy IV for iOS uses screen recording to display a Pokémon's IVs, DPS, and PvP ranks via a notification while you are still in-game.
Your device must be running iOS 15.0 or later .
While Calcy IV is highly rated, there are other prominent options for iOS trainers: Reddit·r/CalcyIVhttps://www.reddit.com