Consider using git or another SCM instead. You don't need a centralized server, you can push/pull between any two machines with ssh (or a handful of other protocols). Encrypted end to end. Supports branches, useful for stuff like dotfiles on different machines. You don't need commit messages, just make an alias to add all changes and commit with and empty message. You have a full history, can revert back to any state, inspect any old version, diff versions, etc. There's git clients for mobile. Free as in beer and freedom. Check-summed. Puts you in control of when to sync, supports offline. Future-proof, acquisition-proof, VC-proof. Familiar.