Shareware model is good
Do people not remember how shareware works?
Either a time- or feature-limited version of an app available for free, which can then be unlocked via a small purchase if you decide you want the extra features?
More App Store apps should be using In-App Purchases to provide a free demo, since the App Store doesn’t really have any other way to ‘try before you buy.
X-caiver about
Countdowns - with Widget