Iris Couch has a beautiful free couchdb service. The only thing is, that they’ll put it to sleep if it’s not used. And it needs quite a time until it’s backup again.
To prevent that I made a cron job on a server I have access to. A simple
curl -X GET http://DBNAME.iriscouch.com/_uuids
every 15 minutes prevents the shutdown of your couchdb. Maybe the interval can be bigger. I’ll have to test that.