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The Apple Watch is a wearable smart watch introduced by Apple in 2015 which includes a number of sensors useful for doing personal science. Since the first release, Apple Watches include a heart rate sensor and accelerometers/gyroscopes for [[activity tracking]]. Since 2020, some Apple Watch models also do rudimentary [[sleep tracking]], though the capabilities are still somewhat behind other wearables. Since the 4th generation, Apple Watches also include an [[ECG]] sensor that can be used to take manual readings and since the 6th generation they it includes a [[Blood Oxygen]] sensor. Beyond this, the Apple Watch also uses its microphone to regularly record environmental noise levels.  

The Apple Watch is a wearable smart watch introduced by Apple in 2015 which includes a number of sensors useful for doing personal science. Since the first release, Apple Watches include a heart rate sensor and accelerometers/gyroscopes for [[activity tracking]]. Since 2020, some Apple Watch models also do rudimentary [[sleep tracking]], though the capabilities are still somewhat behind other wearables. Since the 4th generation, Apple Watches also include an [[ECG]] sensor that can be used to take manual readings and since the 6th generation they it includes a [[Oxygen saturation|Blood oxygen]] sensor. Beyond this, the Apple Watch also uses its microphone to regularly record environmental noise levels.  

==Data storage and export==

==Data storage and export==