1. Download esign from esign.yyyue.xyz

2. Make sure to download or buy a certificate from esigncert.zeejb.com

3. Install esign either using a cert or for free

4. Open the app, if you can’t open it, go to Settings > General > Device Management > Tap the certificate > tap “Trust”

5. Open esign, then import the certificate you downloaded

6. Import your ipa file, then tap it to install

7. You can modify the app if you want

8. After installation is done, if somehow you cannot open it, then go to Settings > General > Device Management > tap on the new cert/the same certificate > tap trust/verify