If life seems to be moving too fast, there’s a remedy: film it in slow motion. These days it’s easy and inexpensive. A popular app for the iPhone and iPad is SloPro (Sand Motion Studios, downloadable at iTunes), which offers 1000 frames per second images, useful if you’re studying hummingbirds. More leisurely rates, say four times slower than reality, can be used for the analysis and appreciation human activities such as golf swings and juggling. Slow motion can also be effective in dramatic scenes, for example, capturing the shattering of a goblet angrily thrown onto the floor.

You might first experiment with the free version. If you like it, for a $3.99 splurge you can get rid of the watermark and enjoy various bells & whistles, such as instant posting to YouTube.