Slow Fast Motion Video Maker is a multimedia application that allows users to speed up or slow down sections of their videos. It works on iPhones and iPads and supports portrait or landscape operation on iPads. The app also corrects audio pitch and has unrestricted video length. The best part is that the app is free and does not add any watermarks to your videos.

The app is easy to use and has received positive reviews from people who have tried it. Users appreciate that they can adjust the speed of their videos without any limitations. They also like that the app allows them to apply speed variations to multiple sections of their videos. Users have noted that the app works smoothly and that the speed changes happen seamlessly. However, the app does have a subscription service that unlocks all features, including music and filters, for a monthly or yearly fee.