Bob
This is one of the best apps that I ever downloaded. Last weekend I had a problem with it not responding. I contacted the developer and told them of the problem, and promptly got an answer how to correct. This was not necessary however as the problem seemed to solve itself. This app is almost "a must" ! Was not able to find anything better (other than the pay version) in the App Store.
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Safe Mail for Gmail Free : secure and easy email mobile app with Touch ID to access multiple Gmail and Google Apps inbox accounts, v2.3