The iPhone, iPad, and Android tablets, and phones have revolutionized the way we interact with smart handheld devices. Here I deliver my favorites in the form of my current list of the best camera apps. My list of the best accelerometer apps includes Checkra1n and a combination of health apps, puzzles, games, and physics.

Accelerometer Apps

Well, as far as the iPhone/iPod is concerned, it’s a solid-state device that measures acceleration in all 3 dimensions within the device. In the most simplistic case, if you twisted the device flat on a covered table, it can distinguish a force of one gravity (g) backward and zero acceleration in both flat directions. This enables the iPod or iPhone to discover whether it is put in landscape or portrait adjustment, and change the screen layout accordingly. There are devices on the market for around $200/$300 that does the same thing, however, they are a little less complex, and best of all, the system is completely free.

AccelMeter

When iPod Touch is in audio player mode, you can swing the thing to push the playback of the soundtrack. You could utilize the accelerometer to move a piece in a ball simulation puzzle, or perhaps to control a character or vehicle in a game. It creates an image of a strong three-dimensional red arrow pointing upward whenever the device is tilted on a flat surface. If the device is shaken, the arrow will move according to the pulses it is subjected to. You can also set an alarm to sound when there is excessive movement. Or you can use it as an awake intruder; for example, to protect your fridge from late-night snacks when your partner is on a strict diet.

Pedometer

This free app turns your iDevice into a complicated pedometer. Note: the free version limits the distance you can measure. If you want it, you’ll have to buy the cover variant. Just open the app and slide the device into your pocket and it will tell you exactly how far you’ve walked or run. For some relief, let’s take a look at many games that use the accelerometer. It’s an extremely simple spelling game where you have to connect the letters at the beginning by shaking the iDevice. Addictive and shows very well how the camera allows easy hand control of the game.

Waterslide Extreme

I like the simulations of the old games where you move a piece around a wooden puzzle and search for the ball in a well. Many of these iPhone/iPod variants are much more advanced. However, there are plenty of icons that help you in various ways and allow you to mess up the red dots. But after about two minutes, you’ll discover so many of those pesky bugs that you’ll already have a huge score.

BellyBio

All in all, today for something entirely distinct! Belly Bio is a bad title for a wonderful free program, I’ve kept the most becoming for last. This is not a game, but a classic example of biofeedback. By consciously calming down, the tone gradually decreases, so the device helps you relax. The device quickly synchronizes with your breathing. It then fades into a relaxing song composed of these waves, which is also synchronized with your breathing. From time to time, the wave seems to return and the net result is that the device syncs with your breathing. The device also keeps a record of each session, including your actual breathing rate.