Finally someone write the camera app designed for stealthy taking photo sometimes i like to take photo on the bus and train.... but when i use the iphone camera, it show the image on screen, i want the iphone to be locked while i can still take the photo. Hidden camera was designed for doing this job, but it used another approach. When you start this app, it show a black screen, and just a very small words "take" is written on screen. You may touch just anywhere on the screen to trigger the camera to take photo. One very clever design is that if your camera is not muted, it will alert you ! Sometimes i just accidentally forgot to turn it silent before taking photo and the iphone produce the "caaappp" sound effect. It is embarrassing for me. This app has a buffer for storing photo in memory. That means you can take photo consecutively. I tested it and it need about 1 - 2 second for each take. It will show how many photos are currently cached and saving to the camera disk. This design is good but the saving speed is still too slow. It may be the problem of iphone itself, i don't know. I have used it on bus and it works. For the people who like to snap you may try it.