Persecond makes it very simple to convert photos to a timelapse video. You can control the speed, in & out points as well as reverse the timelapse. Sadly, this is really all it does and therefore a price of $25 seems pretty expensive to me. Or to phrase it the other way around: For $25 i expected it to do much more.
Especially because its features arent very useful in the first place. You can easily control in and out points by inly importing those pictures you want to use and reverting a timelapse is nothing i ever needed. In the speed control department it missed the only feature i needed: selecting between 24, 25 and 30fps export format. i mean, you cant even control the resolution of the final video nor the quality or size...
Why not grab Timelapse Assembler for free and donate a couple of bucks to the developer? It does more and costs nothing at all. Persecond is a one feature rich $25 application that looks pretty. Sorry, for my harsh words, but this price tag is just absurd to me.