This is the most popular method. It uses your Apple ID to sign the app. You will need a computer for the initial setup, and you must refresh the app every seven days.
One of the biggest reasons players seek out IPA files is for modding. "GTA SA 2.0" and higher versions changed how files are handled, but modders have found ways to inject content: ipa gta san andreas
Set this to "Low" or "Medium" to reduce lag during high-speed chases. This is the most popular method