Send it now.
Make new data available to authorized recipients as soon as the platform receives it.
Independent accountability campaign · physician-led · evidence-linked
Your body made the data. The platform should not control it.
Wearable companies can measure us around the clock—then delay, limit, or gate access to the results. That can stop patients, clinicians, caregivers, and independent builders from using the data when it matters. WearOpen exposes those barriers, ranks them publicly, and pushes every manufacturer to open its platform.
No platform currently earns an Open rating.Ten leading platforms. Not one meets the standard for complete, user-directed access without added delay. This should be the baseline—not a premium feature.
10 platforms · 6 criteria · timing reviewed August 25, 2026
The 10-second accountability check
Where your data gets stopped.
Can it reach another app, a person or doctor, and an independently built tool? Read across each row for the answer.
Noneare fully open
✓ Open and direct⏱ Delayed, conditional, or sync-dependent🔒 Approval or commercial gate× No documented route
PlatformAnother appPerson or doctorBuild with itMain wait
Apple WatchApple Health + HealthKit
Another appDirectUsually seconds–minutes*
Person or doctorMixedPerson: minutes* · provider ≈24 h
Build with itSelf-serve$99/year to publish
Main waitApps/person: minutes* · provider ≈24 h
Google HealthFitbit + Pixel Watch
Another appAvailableUsually minutes after sync*
Person or doctorNo built-in viewA separate app is required
Build with itGated at scale100-user cap before review
Main waitUsually minutes* · hours if offline
Oura RingOura + Cloud API
Another appAvailableUsually a few minutes after sync*
Person or doctorReport onlyNot a live care view
Build with itApproval requiredAfter 10 users
Main waitUsually a few minutes after sync*
PolarPolar Flow + AccessLink
Another appAvailableWaits for watch upload
Person or doctorCoach viewNot a medical dashboard
Build with itSelf-serveFree public API
Main wait≈30–60 min
Samsung HealthGalaxy Watch + Galaxy Ring
Another appHealth ConnectUsually minutes after watch sync*
Person or doctorNo live viewNo follower or doctor route
Build with itPartial accessHealth Connect open · SDK gated
Main waitUsually minutes* · hours if app sleeps
WHOOPWHOOP 5.0 + Developer Platform
Another appAvailableUsually minutes after processing*
Person or doctorNo live viewNo follower or doctor route
Build with itApproval requiredAfter 10 users
Main waitUsually minutes after processing*
DexcomG7 + Clarity + Follow
Another appDelayedHealth apps: ≈3 h
Person or doctorFast follower≈5 min · clinic ≈3 h
Build with itLicensedApproval + commercial deal
Main waitFollower ≈5 min · other routes ≈3 h
GarminGarmin Connect + Health API
Another appAvailableManual sync: usually minutes*
Person or doctorNo native viewAn integration is required
Build with itCommercialApproval + undisclosed fee
Main waitManual: minutes* · auto: hours possible
FreeStyle LibreLibreView + LibreLinkUp
Another appNo broad routeNo Apple or Google health export
Person or doctorFast follower≈1 min · clinic usually minutes*
Build with itNo public APIAbbott apps and portals only
Main waitFollower ≈1 min · clinic usually minutes*
LingoAbbott consumer CGM
Another appDelayedApple / Google health: exactly 3 h
Person or doctorNo continuous viewNo follower or doctor route
Build with itNo public APISpreadsheet export only
Main waitExactly 3 h
The campaign
Open the platforms. Give people control.
Not eventually. Not through screenshots. Not only for approved corporate partners. People should be able to direct the data their bodies generate—to a clinician, caregiver, app, or tool they choose—completely and without an added holding delay.
Let the user choose.
People should be able to grant and revoke continuous access for a clinician, caregiver, or app.
Open the door to builders.
Useful production APIs should be self-serve—not reserved for companies with a private deal.
Give the whole record.
Provide complete, machine-readable exports and publish every delay, limit, fee, and omission.
The company built the device. You generated the data. You should decide where it goes.
Evidence from the field
Barriers are harder to ignore when they are documented.
Corrections, observed delays, missing routes, and improvement ideas appear here only after editorial review. Approved reports can challenge a finding or show where the published documentation falls short.
Loading approved notes…
The standard
Open means useful outside the company's own walls.
The detailed model uses six weighted criteria, but the principle is simple: the person generating the data should be able to direct it, receive it promptly, and use it without asking a corporation for special permission.
100 means no lock-in.No extra holding delay beyond the device's normal measurement cycle, plus complete exports, self-serve production APIs, and a care-team view that matches the wearer's.
What does the wearer see?
We identify the native watch or app timing first—but do not mistake that for external sharing.
When does someone else get it?
We follow the full path to the outside recipient. A fast native app does not erase a three-hour or one-day sharing delay.
Can you build with it?
Complete data, clear terms, reasonable cost, and production access without a private backend deal score higher.
Read the full scoring rules
Health-platform portability
25%Do core metrics move into Apple Health, Google Health / Health Connect, and Samsung Health—and is each path direct, automatic, complete, and timely?
Full credit: Broad metrics move automatically across both major phone ecosystems, with a direct or clearly documented Samsung route and no material relay delay.Care-team parity
25%Can a person grant continuous access that is close to the view they see themselves?
Full credit: The wearer can grant and revoke a continuous physician view matching what they see themselves.Automated access & terms
20%Is useful production access self-serve—or gated by user caps, approval, security review, licensing, or a commercial deal?
Full credit: Real-user production access is self-serve, with no user cap, approval queue, private contract, or data license.Complete self-export
15%Can a person promptly download complete, machine-readable data—including important context?
Full credit: A prompt machine-readable export includes raw readings, derived scores, tags, meals, workouts, and relevant context.End-to-end freshness
10%How long does it take a new measurement to travel from device to phone, company server, health platform, outside app, follower, or clinician? Speed inside the company’s own app does not count by itself.
Full credit: Supported continuous outside routes pass new data through as soon as the provider receives it, within the device’s normal measurement timing, with no intentional hold or manual refresh.Transparency & control
5%Are scopes, limitations, consent, and revocation documented clearly?
Full credit: Scopes, latency, retention, consent, revocation, limits, and every access fee are public and clear.Freshness scale
10/10Pass-through. No intentional hold: supported outside routes move data as soon as the provider receives it, without user action.
8–9/10Fast, conditional. The final handoff is automatic, but it still waits for an earlier wearable-to-phone sync whose maximum is not guaranteed.
6–7/10Mixed. One outside route is close to the device’s normal measurement timing, while another has a documented delay or a transfer step whose maximum is not guaranteed.
3–5/10Delayed / manual. Opening an app, manually transferring data, a multi-hour hold, or an irregular upload dominates outside access.
0–2/10Retrospective. Only reports, exports, screenshots, or no continuous external sharing route.
Hold platforms accountable
Document the barrier. Build the pressure for change.
Report a real-world delay, closed route, missing metric, API gate, correction, or improvement. Every documented barrier makes it harder to dismiss the problem—and easier to demand a fix.
Report a barrier or submit evidence
Created by Dr. Andrew Zimmerman to make wearable-data barriers visible, comparable, and harder to ignore—and to push wearable makers to open their platforms. No manufacturer sponsors the scores. About Andrew →