happn vs K-9 Mail
A side-by-side look at happn and K-9 Mail. For an in-depth review of either product, follow the links below.
happn
Development
happn is an open-source, scalable pub/sub and data synchronization engine designed for high-performance real-time web and IoT applications. It enables rapid development of collaborative and distributed systems by handling data synchronization, messaging, and eventing.
pubsubdata-syncrealtimescalable
K-9 Mail
Social & Communications
K-9 Mail is an open source email client for Android focused on security and privacy. It supports multiple accounts, search, tagging, notifications and more.
opensourcesecurityprivacyandroid
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