Editing Apple Watch

The '''Apple Watch''' is a wearable smart watch introduced by Apple in 2015 which includes a number of sensors that can be used for personal science.  

{{Tool Infobox 
|Related topics=HRV (Heart Rate Variability), Activity tracking, Sleep tracking, Oxygen saturation
}}

Since the first release, Apple Watches include a heart rate sensor and accelerometers/gyroscopes for [[activity tracking]]. Since 2020, some Apple Watch models can also do rudimentary [[sleep tracking]].  

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, though this has been disabled in recent models sold in the USA due to patent issues<ref name=":0">https://www.theverge.com/2024/1/17/24041945/apple-watch-series-9-ultra-2-blood-oxygen-ban</ref>.  

Beyond this, the Apple Watch also uses its microphone to regularly record environmental noise levels. 

==Data storage and export==
All the data recorded by an Apple Watch is stored locally on the iPhone it is connected too and can be found inside the [[Apple Health]] application. Exporting the data from Apple Health is not trivial though. While [https://medium.com/macoclock/how-to-export-health-data-from-iphone-60a88cfe1825 it is possible to export all data as a full dump of all data from Apple Health], this generates a large ZIP archive that contains the data in an XML format that is not easy to re-use.  

=== Exporting via Health Auto Export ===
The iPhone app [[Health Auto Export (Apple)|Health Auto Export]] provides a way to export selected data in JSON, CSV or GPX files (the latter for geolocation data from workouts). The CSV format in particular can be used to import data into Excel or other spreadsheet software. While the base-version of the application is free, additional export options can also be made available through an in-app purchase. This allows to automatically sync data to iCloud and also provides a way to synchronize data to other external services. 

== Projects using Apple Watch ==

* [[User:Gedankenstuecke|Bastian Greshake Tzovaras]] used the environmental noise data to explore [https://forums.openhumans.org/t/headphone-vs-environmental-noise-levels/241 how the sound of his surroundings shape how loud he plays music on his headphones].
** He also used environmental noise data together with location data from [[Overland]] to [https://exploratory.openhumans.org/notebook/77/ explore how sound levels change throughout the city].
** He recently adapted his website to [https://tzovar.as/exporting-data-apple-health/ show metrics from Apple Health (incl. from his Apple Watch) in the website footer].

==Sensors in different Apple Watch series==

The table below is an abridged version of the [https://en.wikipedia.org/wiki/Apple_Watch#Comparison_of_models one found on Wikipedia], focusing on the sensors that are used on the different Apple Watch series.
{| class="wikitable mw-collapsible" style="text-align:center; font-size:90%"
! colspan="2" | Specification
! style="background:#ff9999" |1st
! style="background:#ffdddd" |Series 1
! style="background:#ffdddd" |Series 2
! style="background:#ddd" | Series 3
! style="background:#f8eaba" |Series 4
! style="background:#f8eaba" |Series 5
! style="background:#f8eaba" |SE (1st)
! style="background:#f8eaba" |Series 6
! style="background:#f8eaba" |Series 7
! style="background:#d4f4b4" |SE (2nd)
! style="background:#f8eaba" |Series 8
! style="background:#f8eaba" |Ultra
! style="background:#d4f4b4" |Series 9
! style="background:#d4f4b4" |Ultra 2
|-
! rowspan="10" |Sensors
![[Heart rate monitor|Optical heart sensor]]
| colspan="4" |1st generation
| colspan="3" |2nd generation
| colspan="2" |3rd generation
|2nd generation
| colspan="4" |3rd generation
|-
![[Electrocardiography|Electrical heart sensor (ECG/EKG)]]
| colspan="4" |No
| colspan="2" |Yes
|No
| colspan="2" |Yes
|No
| colspan="4" |Yes
|-
![[Oxygen saturation (medicine)|Blood oxygen sensor]]
| colspan="7" |No
| colspan="2" |Yes
|No
| colspan="2" |Yes
| colspan="2" |Yes (Disabled for U.S. models sold from January 18, 2024)<ref name=":0" />
|-
!Temperature sensor
| colspan="10" |No
| colspan="4" |Yes
|-
![[Accelerometer]]
| colspan="4" |16g
| colspan="5" |32g
| colspan="5" |High-g
|-
![[Gyroscope]]
| colspan="4" |Yes
| colspan="5" |Improved
| colspan="5" |High dynamic range
|-
![[Ambient light sensor]]
| colspan="14" |Yes
|-
![[Altimeter]]
| colspan="3" |No
| colspan="3" |Yes
| colspan="8" |Always on
|-
![[Compass]]
| colspan="5" |No
| colspan="9" |Yes
|-
!Battery life
|24h
|24h
|24h
|24h
|18h
|18h
|18h
|18h
|18h
|18h
|18h
|36h
|18h
|36h
|-
! colspan="2" |Date released
|April 24, 2015
|September 12, 2016
|September 16, 2016
|September 22, 2017
|September 21, 2018
|September 25, 2019
| colspan="2" |September 18, 2020
|October 15, 2021
| colspan="2" |September 16, 2022
|September 23, 2022
| colspan="2" |September 22, 2023
|- }

|}

== References ==
<references />
[[Category:Body temperature tracking tools]]
[[Category:Tools]]
[[Category:Fitness and heart rate tracking tools]]
[[Category:Sleep tracking tools]]
[[Category:Hardware]]