: Plug your iPhone into your computer using a lightning or USB-C cable. Open Sideloading Tool : Launch AltStore or Sideloadly.
Downloading IPAs from third-party sites carries inherent risks. These files aren't officially vetted by Apple, so they could potentially contain malware or tracking scripts.
Most users searching for "portable" in this phrase actually want the that can be moved between devices (e.g., from an old iPhone to a newer one) without forced updates.