Is it safe to give your developer account (email address only) to another developer in order that they can generate an ipa certificate for me to test an app on my own device?
Generating an ipa certificate
An email address alone isn't enough to do anything w/a dev account.
As for safe, what kind of contract do you have w/that other dev? If you give them your account credentials, they can do anything with that account that you can.
See these links for various roles that can be applied to different people on an account to check if any fill your needs:
- iTC Roles Table B-1
- Related: Setting Up User Accounts
- Program (Member Center) roles: