The legitimate AnkiMobile app is a paid app developed by Ankitects PTY LTD, found on the official Apple App Store .
Installing unauthorized .ipa files (sideloading) can allow malicious code to access your phone data. The legitimate AnkiMobile app is a paid app
If you're asking because you're looking for a free alternative, I can suggest a few authorized, free alternatives to the paid app! I can suggest a few authorized