People report about 3 days to feel fairly comfortable on it.

As for the subscription, there will be a new theme every month, so that provides a little recurring value.

The problem I ran into with version 1 and 1.5, which just cost a buck or two upfront, was that with that business model, it takes a lot of customers to pay off continuing development costs (because the customer is essentially getting lifetime updates, all for a buck or two). And it leaves little money for customer acquisition (ie marketing).

So my hope was to: a) Provide a way to let people try the keyboard for free (which Apple's App Store policies don't make very easy to do), and b) Fund continued development so I can keep adding good features.

I admit I'm not sure I have the right pricing model, but I'm going to give it a try and see how it goes, then adjust from there. :) Pricing per feature might work, though I hate to keep upselling people, and Apple does not allow In-App Purchases to be in the keyboard area, so it doesn't work quite as well as in a normal app. Thanks for trying it! -Corey