This smart little idea is basically an iPhone screen (with printed bezel) at actual size printed on Post-it Notes. The screen itself has a 20pt dot grid making it easy to layout out your next set of comps/ideas. And for those people who love and live by Post-it Notes, this is a great tool to add to your development toolkit.
Each Apps-on pad has 50 sheets for your designs. Prices start at $20.00 (USD) for 5 pads for the "Starter" pack. There is also a Pro pack with 10 pads for $30.00 (USD) and Master pack with 20 pads for only $59.00 (USD) all available online at Apps-on.com.
Good job Rex and good luck!