Canary Mail is the mail app you need, security and features in one, wrapped up and delivered to you! There is a lot more you can do with it - everything is systematized, organized and with an easy User Experience!
Flow-e treats your emails as tasks without leaving your Gmail/Office365 inbox. Flow-e is just a visualization of your inbox; we don't store your data. The best part? Whatever you change in Flow-e, changes in your email too.
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Maily is the dead-simple, people-centric mail app you've been waiting for.