We have a similar concept, with a far less fancy estimator. http://www.decemberlabs.com/appEstimator.html
I think these estimators are good at helping non savvy potential customers tu understand the actual costs of making an app.
Well is not. In fact if you are based in a country other than the US you can arrive to those costs with competent developers. I think we are very competent, you can check us out in www.decemberlabs.com
database-per-user is a common pattern with CouchDB. If you need to aggregate data across your users for reporting etc then you can use a server-side replication to create a "master" database which is only accessible to your internal users.
You could also use filtered replication but it is:
a) not scalable
b) not secure (the whole db would still be accessible to all users)
Couchbase has a different spin on this via "channels" though I'm not sure how it interoperates with PouchDB.
Couchbase Sync Gateway's channels are just slices through the data. The mechanism is internal to the Sync Gateway (you write a JS function that says who can see which channels and which channels a doc belongs to.) Replicating clients don't Need to know about this filtering, so channels work great with all flavors of Couch.
I always thought it would be interesting to have an appstore prereview startup that in 1 day will check and give you a hint if your app would be accepted.
That would be cool, but I think the review process is random enough that it would be hard to make really confident predictions about what gets in and what doesn't.
You could pitch it as a more general service I guess. "We'll tell you how to improve your app, including ways to improve your odds of a successful app review" or something like that.
