How to transfer your app from the Developer to your account?
Superiors would like the App under our Organization to launch, rather under the developer partner. So, requested them to transfer it to us.
How to: Apple
1. Let the Partner obtained our Apple ID and Team ID.
2. They transferred the App to our account.
3. Apple noticed us that done.
3. We added their account to the Role for the App.
How to: Google
2. They submitted a transfer request.
3. Google noticed us that done.
4. We added their account to the Role for the App.
References
How To Transfer Your App From One Apple Developer Account To Another
https://learn.buildfire.com/en/articles/3345275-how-to-transfer-your-app-from-one-apple-developer-account-to-another
How can you transfer apps from one developer account to another developer account?
https://help.magloft.com/en/articles/2001857-how-can-you-transfer-apps-from-one-developer-account-to-another-developer-account
Transfer apps to a different developer account
https://support.google.com/googleplay/android-developer/answer/6230247
Update
How to: Apple
1. Let the Partner obtained our Apple ID and Team ID.
2. They transferred the App to our account.
3. Apple noticed us that done.
3. We added their account to the Role for the App.
How to: Google
1. Let the Partner obtained our email & transaction ID.
About transaction ID: https://support.google.com/googleplay/android-developer/answer/6230247#registration
2. They submitted a transfer request.
3. Google noticed us that done.
4. We added their account to the Role for the App.
References
How To Transfer Your App From One Apple Developer Account To Another
https://learn.buildfire.com/en/articles/3345275-how-to-transfer-your-app-from-one-apple-developer-account-to-another
How can you transfer apps from one developer account to another developer account?
https://help.magloft.com/en/articles/2001857-how-can-you-transfer-apps-from-one-developer-account-to-another-developer-account
Transfer apps to a different developer account
https://support.google.com/googleplay/android-developer/answer/6230247
Update