iOS will only run apps that are cryptographically signed. Official apps are signed by Apple. Sideloading works by using a different signature, such as your own free Apple ID or a third-party signing service.
Unlocking Your iPhone: The Ultimate Guide to Sideloading and TweakBox Sideload.tweakboxapp.com
The short answer is . While the official TweakBox website remains online, the service itself is largely defunct. iOS will only run apps that are cryptographically signed
However, the world of iOS sideloading has changed significantly in 2026. Here is everything you need to know about using TweakBox and modern alternatives safely. Is TweakBox Still Working in 2026? Sideload.tweakboxapp.com