Install error help - July sale $7
Fix iPhone IPA install errors
If your iPhone says Unable to Verify App, integrity could not be verified, or app cannot be installed, the problem is usually the certificate, provisioning profile, UDID, or a revoked signature.
What usually causes the error
- The app was signed with a certificate that expired or was revoked.
- The mobileprovision profile does not include your iPhone UDID.
- The IPA was signed with the wrong certificate password or mismatched profile.
- The app bundle is incompatible with your iOS version.
What CertDrop gives you
- A .p12 signing certificate, matching .mobileprovision profile, and password.
- Delivery by email with an install/download page.
- Help pages for ESign, Feather, IPA signing, and common install errors.
- Replacement support if delivery or certificate generation needs attention.
Frequently asked questions
Why does iPhone say Unable to Verify App?
The most common reasons are a revoked or expired certificate, a provisioning profile that does not include the device UDID, or an app signed with mismatched certificate files.
Does reinstalling the IPA fix it?
Sometimes, but if the certificate is revoked or the UDID is missing from the profile, the IPA needs to be signed again with working certificate files.
Can CertDrop help with ESign or Feather errors?
Yes. CertDrop provides certificate files that work with compatible signing tools, and includes install help for common ESign and Feather issues.