Who really owns your wearable data?

0–100 data-ownership scorecards for 32 rings, watches, bands and sensors: official API, export, Home Assistant, Gadgetbridge, and subscriptions. Every claim cites a source.

Browse scorecards Compare devices

70+ Great 50+ Good 30+ Fair <30 Poor

⚠️ Heads-up: the legacy Fitbit Web API shuts down on Oct 30, 2026. What it means for Fitbit & Pixel Watch owners →

⭐ Flagship deep dives Oura vs Garmin vs Apple →

Garmin fēnix 8

Garmin · Watches
Great

Oura Ring 4

Oura · Rings
Fair

Apple Watch (SE / Series / Ultra)

Apple · Watches
Fair

Garmin fēnix 8: Your files live on the watch, and the cloud is optional. · Oura Ring 4: Great API, but your API access lapses with your membership. · Apple Watch: Very private, but your data is locked to the iPhone.

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The top-selling named smartwatches and smart rings on Amazon US (Best Sellers, checked 2026-10-20), with their data ownership scores.

#	Product	Data ownership	Subscription
1	Apple Watch SE 3	35 Fair	None
2	Oura Ring 5	48 Fair	Oura Membership
3	Apple Watch Series 12	35 Fair	None
4	RingConn Gen 3	23 Poor	None
5	Garmin vívoactive 5	78 Great	Garmin Connect+ (optional, not needed)
6	Oura Ring 4	48 Fair	Oura Membership
7	Garmin Forerunner 165	78 Great	None
8	RingConn Gen 2 Air	23 Poor	None
9	Amazfit Bip 6	53 Good	Zepp Aura (optional)
10	RingConn Gen 2	23 Poor	None

Rankings change hourly. We skipped unbranded listings and kids' watches. Sources: Smartwatches · Smart rings.

🏆 Most open All devices →

Bangle.js 2

Espruino · Watches
Great

PINE64 PineTime

PINE64 · Watches
Great

Polar H10 (chest strap)

Polar · Sensors
Great

Garmin fēnix 8

Garmin · Watches
Great

Garmin Forerunner 165

Garmin · Watches
Great

Garmin vívoactive 5

Garmin · Watches
Great

🔒 Most locked-in

Eight Sleep Pod

Eight Sleep · Other
Poor

RingConn Gen 3

RingConn · Rings
Poor

RingConn Gen 2 Air

RingConn · Rings
Poor

📝 Tips All tips →

Gadgetbridge: use your wearable without the vendor's cloud

Gadgetbridge is an open-source Android app that talks to many watches, bands and rings directly, so your data never has to leave your phone.

Getting wearable data into Home Assistant: official vs community integrations

Some wearables have official Home Assistant integrations; others rely on HACS or your phone. Here's how to pick, and what to watch out for.

How to export all your health data (Apple, Samsung, Google, Oura, COROS)

Before you switch devices or cancel a subscription, take a full export. Here's where each platform keeps the button.