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{{Tool Infobox
|Category=Observe
|Datatype= Activity Tracking, Sleep Tracking
|Related topics=HRV (Heart Rate Variability)
}}
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.
==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 [https://apps.apple.com/us/app/health-auto-export-json-csv/id1115567069 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].
==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"
!Legend:
|{{legend2|silver|{{abbr|Discontinued and unsupported|Device is discontinued and no longer sold}}|border=1px solid #AAAAAA}}
|{{legend2|#f8eaba|{{abbr|Discontinued, but still supported |Discontinued older device versions, not currently being sold but still supported.}}|border=1px solid #AAAAAA}}
|{{legend2|#a4f4a4|{{abbr|Current|Current versions of devices being sold.}}|border=1px solid #AAAAAA}}
|}
{| class="wikitable mw-collapsible" style="text-align:center; font-size:90%;"
!Specification<ref name="appleWatchCompare">{{cite web|url=https://www.apple.com/watch/compare/|title=Apple Watch – Compare|website=Apple|access-date=March 5, 2018}}</ref>
! style="background:silver;" |1st generation<ref name="appleWatch0TS">{{cite web|url=https://support.apple.com/kb/SP735|title=Apple Watch (1st generation) - Technical Specifications|website=support.apple.com}}</ref>
! style="background:silver;" |2nd generation (Series 1)<ref name="appleWatchCompareArchived" />
! style="background:silver;" |2nd generation (Series 2)<ref name="appleWatchCompareArchived" />
! style="background:#a4f4a4;" |3rd generation (Series 3)<ref name="appleWatch3TS">{{cite web|url=https://support.apple.com/kb/SP766|title=Apple Watch Series 3 - Technical Specifications|website=support.apple.com}}</ref><ref name="appleWatchCompare" />
! style="background:#f8eaba;" |4th generation (Series 4)<ref>{{Cite web|url=https://www.apple.com/watch/compare/|title=Apple Watch - Compare Models|website=Apple|access-date=September 13, 2018}}</ref>
! style="background:#f8eaba;" |5th generation (Series 5)<ref name=":2">{{Cite web|url=https://www.apple.com/watch/compare/|title=Apple Watch - Compare Models|website=Apple|access-date=September 12, 2019}}</ref>
! style="background:#a4f4a4;" |6th generation (SE)
! style="background:#f8eaba;" |6th generation (Series 6)
! style="background:#a4f4a4;" |7th generation (Series 7)
|-
![[Water Resistant mark|Water resistance]]<ref name="appleWatchCompare" />
| colspan="2" |[[IP Code|IPX7]] splash resistant (up to 1 meter)<ref name="appleWatch0TS" /><ref name="appleWatchCompareArchived" />
| colspan="7" |[[International Organization for Standardization|ISO]] 22810:2010 water resistant (up to 50 meters)<ref name="appleWatch3TS" /><ref name="appleWatchCompareArchived" /><ref name=":2" />
|-
![[Heart rate monitor|Optical heart sensor]]<ref name="appleWatchCompare" />
| colspan="4" |1st generation<ref name="appleWatch0TS" /><ref name="appleWatchCompareArchived" /><ref name="appleWatch3TS" /><ref name="appleWatchCompare" />
| colspan="3" |2nd generation<ref name="Apple:Apple Watch Series 5 Technical Specifications">{{cite news |title=Apple Watch Series 5 - Technical Specifications |url=https://support.apple.com/kb/SP808 |access-date=9 October 2021 |publisher=Apple}}</ref><ref name="Apple:Apple Watch SE Technical Specifications">{{cite news |title=Apple Watch SE - Technical Specifications |url=https://support.apple.com/kb/SP827 |access-date=9 October 2021 |publisher=Apple}}</ref>
| colspan="2" |3rd generation<ref name="Apple:Apple Watch Series 6 Technical Specifications">{{cite news |title=Apple Watch Series 6 - Technical Specifications |url=https://support.apple.com/kb/SP826 |access-date=9 October 2021 |publisher=Apple}}</ref><ref name="Apple:Apple Watch Series 7 Technical Specifications">{{cite news |title=Apple Watch Series 7 - Technical Specifications |url=https://support.apple.com/kb/SP860 |access-date=15 October 2021 |publisher=Apple}}</ref>
|-
![[Electrocardiography|Electrical heart sensor (ECG/EKG)]]<ref name="appleWatchCompare" />
| colspan="4" |No<ref name="appleWatchCompare" />
| colspan="2" |Yes<ref name="appleWatchCompare" /><ref name=":2" />
|No
| colspan="2" |Yes
|-
![[Oxygen saturation (medicine)|Blood oxygen sensor]]<ref name="appleWatchCompare" />
| colspan="7" |No<ref name="appleWatchCompare" />
| colspan="2" |Yes<ref name="appleWatchCompare" /><ref name=":2" />
|-
![[Accelerometer]]<ref name="appleWatchCompare" />
| colspan="4" |16g<ref name="appleWatch0TS" /><ref name="appleWatchCompareArchived" /><ref name="appleWatch3TS" /><ref name="appleWatchCompare" />
| colspan="5" |32g<ref name="appleWatchCompare" /><ref name=":2" />
|-
![[Gyroscope]]<ref name="appleWatchCompare" />
| colspan="4" |Yes<ref name="appleWatch0TS" /><ref name="appleWatchCompareArchived" /><ref name="appleWatch3TS" /><ref name="appleWatchCompare" />
| colspan="5" |Improved<ref name="appleWatchCompare" /><ref name=":2" />
|-
![[Altimeter]]<ref name="appleWatchCompare" />
| colspan="3" |No<ref name="appleWatch0TS" /><ref name="appleWatchCompareArchived" />
| colspan="3" |Yes<ref name="appleWatch3TS" /><ref name="appleWatchCompare" /><ref name=":2" />
| colspan="3" |Always on<ref name="appleWatch3TS" /><ref name="appleWatchCompare" /><ref name=":2" />
|-
![[Compass]]
| colspan="5" |No
| colspan="4" |Yes<ref name="autogenerated1">{{Cite web|url=https://support.apple.com/kb/SP808?locale=en_US|title=Apple Watch Series 5 - Technical Specifications|website=support.apple.com|access-date=September 19, 2019}}</ref>
|-
!Introduced
|April 2015
| colspan="2" |September 2016
|September 2017
|September 2018
|September 2019
| colspan="2" |September 2020
|September 2021
|-
!Discontinued
|September 2016
|September 2018
|September 2017
|In production
|September 2019
|September 2020
|In Production
|September 2021
|In Production
|}
<references />
|Category=Observe
|Datatype= Activity Tracking, Sleep Tracking
|Related topics=HRV (Heart Rate Variability)
}}
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.
==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 [https://apps.apple.com/us/app/health-auto-export-json-csv/id1115567069 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].
==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"
!Legend:
|{{legend2|silver|{{abbr|Discontinued and unsupported|Device is discontinued and no longer sold}}|border=1px solid #AAAAAA}}
|{{legend2|#f8eaba|{{abbr|Discontinued, but still supported |Discontinued older device versions, not currently being sold but still supported.}}|border=1px solid #AAAAAA}}
|{{legend2|#a4f4a4|{{abbr|Current|Current versions of devices being sold.}}|border=1px solid #AAAAAA}}
|}
{| class="wikitable mw-collapsible" style="text-align:center; font-size:90%;"
!Specification<ref name="appleWatchCompare">{{cite web|url=https://www.apple.com/watch/compare/|title=Apple Watch – Compare|website=Apple|access-date=March 5, 2018}}</ref>
! style="background:silver;" |1st generation<ref name="appleWatch0TS">{{cite web|url=https://support.apple.com/kb/SP735|title=Apple Watch (1st generation) - Technical Specifications|website=support.apple.com}}</ref>
! style="background:silver;" |2nd generation (Series 1)<ref name="appleWatchCompareArchived" />
! style="background:silver;" |2nd generation (Series 2)<ref name="appleWatchCompareArchived" />
! style="background:#a4f4a4;" |3rd generation (Series 3)<ref name="appleWatch3TS">{{cite web|url=https://support.apple.com/kb/SP766|title=Apple Watch Series 3 - Technical Specifications|website=support.apple.com}}</ref><ref name="appleWatchCompare" />
! style="background:#f8eaba;" |4th generation (Series 4)<ref>{{Cite web|url=https://www.apple.com/watch/compare/|title=Apple Watch - Compare Models|website=Apple|access-date=September 13, 2018}}</ref>
! style="background:#f8eaba;" |5th generation (Series 5)<ref name=":2">{{Cite web|url=https://www.apple.com/watch/compare/|title=Apple Watch - Compare Models|website=Apple|access-date=September 12, 2019}}</ref>
! style="background:#a4f4a4;" |6th generation (SE)
! style="background:#f8eaba;" |6th generation (Series 6)
! style="background:#a4f4a4;" |7th generation (Series 7)
|-
![[Water Resistant mark|Water resistance]]<ref name="appleWatchCompare" />
| colspan="2" |[[IP Code|IPX7]] splash resistant (up to 1 meter)<ref name="appleWatch0TS" /><ref name="appleWatchCompareArchived" />
| colspan="7" |[[International Organization for Standardization|ISO]] 22810:2010 water resistant (up to 50 meters)<ref name="appleWatch3TS" /><ref name="appleWatchCompareArchived" /><ref name=":2" />
|-
![[Heart rate monitor|Optical heart sensor]]<ref name="appleWatchCompare" />
| colspan="4" |1st generation<ref name="appleWatch0TS" /><ref name="appleWatchCompareArchived" /><ref name="appleWatch3TS" /><ref name="appleWatchCompare" />
| colspan="3" |2nd generation<ref name="Apple:Apple Watch Series 5 Technical Specifications">{{cite news |title=Apple Watch Series 5 - Technical Specifications |url=https://support.apple.com/kb/SP808 |access-date=9 October 2021 |publisher=Apple}}</ref><ref name="Apple:Apple Watch SE Technical Specifications">{{cite news |title=Apple Watch SE - Technical Specifications |url=https://support.apple.com/kb/SP827 |access-date=9 October 2021 |publisher=Apple}}</ref>
| colspan="2" |3rd generation<ref name="Apple:Apple Watch Series 6 Technical Specifications">{{cite news |title=Apple Watch Series 6 - Technical Specifications |url=https://support.apple.com/kb/SP826 |access-date=9 October 2021 |publisher=Apple}}</ref><ref name="Apple:Apple Watch Series 7 Technical Specifications">{{cite news |title=Apple Watch Series 7 - Technical Specifications |url=https://support.apple.com/kb/SP860 |access-date=15 October 2021 |publisher=Apple}}</ref>
|-
![[Electrocardiography|Electrical heart sensor (ECG/EKG)]]<ref name="appleWatchCompare" />
| colspan="4" |No<ref name="appleWatchCompare" />
| colspan="2" |Yes<ref name="appleWatchCompare" /><ref name=":2" />
|No
| colspan="2" |Yes
|-
![[Oxygen saturation (medicine)|Blood oxygen sensor]]<ref name="appleWatchCompare" />
| colspan="7" |No<ref name="appleWatchCompare" />
| colspan="2" |Yes<ref name="appleWatchCompare" /><ref name=":2" />
|-
![[Accelerometer]]<ref name="appleWatchCompare" />
| colspan="4" |16g<ref name="appleWatch0TS" /><ref name="appleWatchCompareArchived" /><ref name="appleWatch3TS" /><ref name="appleWatchCompare" />
| colspan="5" |32g<ref name="appleWatchCompare" /><ref name=":2" />
|-
![[Gyroscope]]<ref name="appleWatchCompare" />
| colspan="4" |Yes<ref name="appleWatch0TS" /><ref name="appleWatchCompareArchived" /><ref name="appleWatch3TS" /><ref name="appleWatchCompare" />
| colspan="5" |Improved<ref name="appleWatchCompare" /><ref name=":2" />
|-
![[Altimeter]]<ref name="appleWatchCompare" />
| colspan="3" |No<ref name="appleWatch0TS" /><ref name="appleWatchCompareArchived" />
| colspan="3" |Yes<ref name="appleWatch3TS" /><ref name="appleWatchCompare" /><ref name=":2" />
| colspan="3" |Always on<ref name="appleWatch3TS" /><ref name="appleWatchCompare" /><ref name=":2" />
|-
![[Compass]]
| colspan="5" |No
| colspan="4" |Yes<ref name="autogenerated1">{{Cite web|url=https://support.apple.com/kb/SP808?locale=en_US|title=Apple Watch Series 5 - Technical Specifications|website=support.apple.com|access-date=September 19, 2019}}</ref>
|-
!Introduced
|April 2015
| colspan="2" |September 2016
|September 2017
|September 2018
|September 2019
| colspan="2" |September 2020
|September 2021
|-
!Discontinued
|September 2016
|September 2018
|September 2017
|In production
|September 2019
|September 2020
|In Production
|September 2021
|In Production
|}
<references />