Download Dopamine

Download only from the official source - the GitHub Releases page (linked from https://ellekit.space/dopamine/):

https://github.com/opa334/Dopamine/releases

• Grab the latest release (3.0.9 or newer). Do not use 3.0 - 3.0.6 - those have a kernel-panic bug; use 3.0.7+.
• Download Dopamine.ipa (for the free-Apple-Account installers on the next page). Only grab Dopamine.tipa if you already have TrollStore.

Which file? .ipa = the normal package the free-Apple-Account tools (Sideloadly / AltStore / SideStore) install. .tipa = the same app packaged for TrollStore (permanent signing, no 7-day expiry) - only useful on TrollStore-capable devices (≈ iOS 14.0 - 16.6.1).

Next: Install Dopamine on the phone → - pick one installer.