When you need it, this works very well

Time-lapse video is an acquired taste but fun in the right situation. Sometimes nothing else will do. The free version of O Snap! is just enough for the casual user. It can work with only 2 projects at a time (the paid version handles more) but rendering the project to video and off-loading it to your Camera Roll allows you to delete the project to make room. Im very happy with what this free version app offers.

RickSB about OSnap! • Lapse & Motion