Apple's freebie tools -- Pages, Numbers, Keynote, Garage Band, etc. -- are wonderful things. I really like Numbers. I'm tolerant of Pages. I've used Pages to write books and publish them to the Apple Bookstore. (Shameless Plug: Pivot to Python.)

These tools have a significant problem. Protobuf.

Read this: NoSQL Database Doesn’t Mean No Schema It was fun to write. And the code works really nicely.