Before using any unofficial signing service like AmS1gn or installing cracked IPAs, it's crucial to be aware of the significant risks involved.

: Apps installed this way bypass all of Apple's standard security checks. This is extremely risky because they could contain malware, spy on your data, or even lock your device for ransom. Only proceed if you fully trust the source of the original APK , and even then, be aware of the risk.

on how to set it up, or would you like to see a comparison with more stable alternatives like AltStore?

Extensive customization and manual p12 certificate importing. Yes (For setup/refreshes) 100% reliable using your personal Apple ID.

: Access to an unrestricted database of modified apps, emulators, and paid applications available for free.

: Sideloading without the "3-app limit" or the constant need to connect to a computer every week.