> Mobile support: CouchDB stands out, in that it can run on an Android or iOS mobile device. In addition to being mobile, the database can also synchronize with

> Mobile support: CouchDB stands out, in that it can run on an Android or iOS mobile device. In addition to being mobile, the database can also synchronize with a remote master database, allowing the data to be shared easily between mobile devices and servers. Meteor actually provides exactly this for MongoDB; it has a "minimongo" package in the browser that supports Mongo's query language, running it synchronously against an in-memory copy of the collection [0]. And with Meteor, you can specify "subscriptions" declaratively that enable bidirectional synchronization while their owner components are in scope. Mongo certainly has some reliability issues (see other comments here) but I've yet to find a full-stack system so painless to develop in, especially if you need realtime support. With things like ToroDB Stampede [1] and a general approach of "write all your code in React with Meteor dependencies factored out into containers," there's a clear migration path towards the relational-based separate-backend-frontend world when you need to go there. [0] https://guide.meteor.com/collections.html https://guide.meteor.com/collections.html [1] https://www.torodb.com/stampede/docs/1.0.0-beta2/about/ https://www.torodb.com/stampede/docs/1.0.0-beta2/about/