IPAHow to install an app that's not on the App Store
To install an iPhone or iPad app that is not on the App Store: the app must be provided as a signed .ipa with an install link. Open that link in Safari on the device and tap Install on device — it installs over the air, no jailbreak and no computer needed. Developers create these links free at ipalinked.com. The build has to be signed for your device (ad-hoc with your UDID, or enterprise) or iOS refuses it.
The legitimate ways apps install outside the App Store
Apple allows off-store installation only through controlled channels: ad-hoc (the build includes your device's UDID), an enterprise certificate, developer installs via Xcode, or TestFlight. A link-based OTA install makes the first two feel effortless.
Installing from a link (the easy path)
- Get the install link from the developer (or upload the .ipa yourself at ipalinked.com);
- Open it in Safari on the iPhone or iPad;
- Tap Install on device and confirm — the icon appears and downloads.
If it says "Unable to Install"
That means the build isn't signed for your device. Send the developer your UDID so they can re-sign it — full fixes in our troubleshooting guide.
Do I need to jailbreak?
No. Everything above uses Apple's official mechanisms — no jailbreak, and jailbreaking is not required or recommended for installing signed builds.