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I'm investigating CouchDB and Couchbase as I am looking for a DB solution for a web application that I will eventually be able to make into a native Android/iOS app as well. From what I understand, CouchDB/Couchbase excel at being able to use the DB offline and have it synchronize as soon as the connection is restored.

I further understand that CouchDB and Couchbase are 2 distinct products from 2 different organizations - CouchDB is from Apache and Couchbase is from Couchbase. There is a great response in SO here explaining some of the differences.

Couchbase has Couchbase-Lite-Android and similar for iOS as native embedded DBs for mobile apps which sync with Couchbase server.

Where I get lost is when I try to find the CouchDB equivalent. Everything points to TouchDB which then says it is no longer actively developed and instead points to Couchbase-Lite-Android as the project that has superceeded it. But does Couchbase-List-Android/iOS sync with CouchDB or just Couchbase? According to the Wiki, it indicates that it can sync with CouchDB, but it is a secondary backend which receives lower priority and/or bug fixes.

So then what are the embedded/mobile versions of CouchDB that should be used for Android/iOS?

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    The replication protocol used to sync against CouchDB is just that, a protocol dataprotocols.org/couchdb-replication which e.g. is used b PouchDB which might be of interest to you. Commented Sep 9, 2014 at 7:29
  • @Daniel Wow... PouchDB - a JS DB? Interesting; never heard of it before. I'll have to look into it more carefully. Thanks for the tip. Commented Sep 9, 2014 at 20:32

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It's "Couchbase Lite".

I've answered a similar question/confusion over here. TouchDB was built to be an Apache-CouchDB compatible database engine suitable for embedding into mobile/desktop apps. The compatible factor here is CouchDB's replication protocol & NoSQL data model.

In a process to offer mobile synchronization as a feature of Couchbase Server, they altered and renamed TouchDB as Couchbase Lite and also, built Sync Gateway to act as a server-side bridge between Couchbase Server and Couchbase Lite.

But the data model & replication protocol are still the same as Apache-CouchDB and Couchbase Lite's replication is entirely compatible with CouchDB.

To conclude, Couchbase Lite <-sync-> Apache-CouchDB & Couchbase Lite <-sync-> (via Sync Gateway) Couchbase Server.

I doubt that CouchDB is a secondary backend which receives lower priority and/or bug fixes. We've been using Couchbase Lite since the days of TouchDB and IMO, Couchbase-Lite is actively developed and greatly supported.

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Thanks for the clarification. I'm trying to wade my way into NoSQL world and was getting a little lost between all the different offerings. Couchbase Lite just made it that much more confusing. :)
I understand; Even I had been through the same. You can have a look at FAQ.(github.com/couchbase/couchbase-lite-ios/wiki/FAQ#compatibility)
Please note that CouchDB is a primary project that is under active development. CouchDB is reasonably popular and quite mature. Sorry for the late comment, but the suppositions about CouchDB are incorrect at this time and I felt it important to get accurate information into this thread.

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