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Right now you can export only hours and money in CSV, though I'm planning to add more detailed reports and exports.

I don't really get you on your own data store—the app syncs with remote CouchDB, do you mean the ability to specify your own remote URL to sync?

Exporting the details likely seems to be required for many users as customers/clients might want to see the details.

With regards to data storage: the idea is to connect a remote data store like tent.io oder remotestorage.io

What details exactly do you mean?