When you install an app with a free Apple Developer account (for example via iLoader and SideStore), iOS signs it with your developer certificate. The first time you open the app, iOS may block it until you explicitly trust that certificate. This is normal—not a virus warning.
Step-by-step: Trust the developer
- On your iPhone or iPad, open Settings.
- Go to General → VPN & Device Management (on older iOS versions this may appear as Device Management or Profiles & Device Management).
- Under Developer App, tap the profile that matches your Apple ID or the app you just installed.
- Tap Trust “…”, then confirm Trust.
- Return to the Home Screen and open the app again.
If you don’t see a profile
- Installation didn’t finish — Re-install the IPA with iLoader or SideStore and wait until the install completes.
- Wrong Apple ID — The profile is tied to the Apple ID used for signing. Sign in with the same account you used in iLoader/SideStore.
- Developer Mode (iOS 16+) — Enable it under Settings → Privacy & Security → Developer Mode, restart, then try again. See Enable Developer Mode iOS.
“Untrusted Developer” vs verification / integrity errors
Trusting the developer fixes the first-launch block. If the app later says it cannot be verified, is unavailable, or fails an integrity check, that is usually expired signing or a certificate issue—not solved by tapping Trust again. Use Refresh SideStore Apps, Sideloaded App Expired After 7 Days, or Fix “Unable to Verify App”.