Let me throw SymmetricDS into the ring: https://symmetricds.org/
In my opinion it is quite underestimated giving its various cross platform and cross product sync capabilities. My first experiences with it are quite promising.
In my opinion it is quite underestimated giving its various cross platform and cross product sync capabilities. My first experiences with it are quite promising.
It appears to be primarily aimed at server-to-server replication. It does support Android and iOS, but I don't see much documentation on that. Do you know if it works in practice to implement offline-first applications?