Mantano and Moon+ are android only, obviously. txtr is the only app I know of that runs on both iOS and Android and has sync. I haven't used it for awhile but I believe you get free cloud storage as well.
Apparently IbisReader (ibisreader.com) is also still available. It's a web app, no idea if it works with the latest versions of iOS and Android. Again, some free cloud storage.
|