Highly reliable, free, and creates a "real" app icon on your home screen.
Settings > General > About > iOS Version. If you are on 16.6.1 or lower, you are eligible. install ipa file without jailbreak
Sideloadly is a lightweight desktop tool designed specifically for quickly dragging and dropping IPA files onto your device. Quickly testing a single IPA file. Highly reliable, free, and creates a "real" app
Use a burner Apple ID for sideloading. Create a new Apple ID that has no credit card, no iCloud data, and no real personal info. If a bad IPA steals that password, they get nothing. no iCloud data