You don't need to buy a wearable accessory to get one of the best weight loss gadgets on the market. If you own an iPhone or Android phone it can already track your movement with built-in sensors.
The iPhone 5s can track steps with the built-in M7 co-processor and the iPhone 6 or iPhone 6 Plus can track steps walked and stairs climbed. The iPhone 6s and iPhone 6s Plus can also track health data just by being in your pocket. Depending on the iPhone model you own, you can also see walking + running distance.
Most recent Android devices like the Samsung Galaxy S5, Galaxy S6, Galaxy Note 4, LG G4, Moto X and others include a fitness app and the hardware to track movement, workouts and other activity like a fitness tracker. If you need an app to do this, look at the free Google Fit app.
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