-Open Safari on your iPhone or iPad
-Download and install the eSign app using a valid certificate profile
-Go to Settings → General → VPN & Device Management
-Tap the installed profile and select Trust
-Open the eSign app
-Allow any required permissions when prompted
-Import the IPA file into eSign (from Files, Safari download, or IPAOMTK.COM)
-Select the IPA file inside eSign
-Choose a signing certificate available in the app
-Tap Sign to start signing the IPA
-Wait for the signing process to complete
-Tap Install after signing finishes
-Return to Settings → General → VPN & Device Management
-Trust the developer certificate if asked
-Go back to the Home Screen
-Open the installed app and start using it
🚦Apps may stop working if the certificate is revoked