publish .ipa file to your beta tester.
#How to ###0.Publish your app with proper Ad hoc provisioning profile (iOS Distribution) ###1.Edit file manifest.plist ###2.Edit download link in index.html ###3.Upload .ipa, manifest.plist, index.html, .mobilerevision to server.
In case for the first time let them download your provisioning profile to their device first.
Send them your link and let them open on their device and tap install.
You can use the same link to let your tester update the app.