iOS: The time between taking your smartphone out, finding and launching the camera app, and then hitting record can result in you losing the moment you want to capture. [Blink] saves you that time by immediately filming on launch.
The app has a timer to show the length of recording, you can stop shooting at any time, and you can start a new clip with the on-screen buttons. There's a shortcut to take a photograph as well, but this inserts the annoying shutter sound in the video. And you can choose to turn the video LED light on or off.
Everything you shoot is automatically stored in the Photos app. The only thing you'll want to be aware of is that [Blink] starts shooting the video in the orientation you start the app, so choose portrait or landscape before you start.
To easily find the [Blink] app when you need to shoot, I'd recommend putting it at the bottom-right corner of the first page of your iPhone. That way, tapping the Home button twice will take you to the screen and you can launch to start filming.