The OKOK International app documents one thing it sends to Apple Health: weight. Its App Store description says that with your authorization it can synchronize all weight data to your Health app. Neither the listing nor OKOK's user agreement lists the body-composition values it sends, so check the permission sheet. Nothing documents transferring past readings.
Trendline is an iPhone app that reads Apple Health. This page covers getting OKOK readings into Health; why Health is the right destination at all is its own page.
If your scale's manual told you to install OKOK International — the app used by WeGuard scales and by some unbranded scales (an App Store reviewer describes one bought on Temu) — this page is for you. Many owners never chose this app; it chose them, one QR code at a time.
Which scales use this app
OKOK International is published by Shenzhen Careyou Health Science and Technology (App Store listing), and its Android build ships under the package name com.chipsea.btcontrol.en (Google Play listing). That package name points to Chipsea, and the listing's developer contact is a chipsea.com address. We could not open Chipsea's own product pages when we rechecked, so we make no claim here about how it sells scales or chips to other brands.
Concretely verifiable pairings: WeGuard's own Amazon listing directs buyers to install OKOK International (WeGuard listing), and a reviewer on the App Store listing describes pairing a Temu-bought scale with it. OKOK itself says not every scale on the market works with this app, so check the manual or QR code that came with yours.
What it writes to Apple Health: weight is the documented item
The App Store description names one thing: with your authorization, "we can synchronize all weight data to your Health app" (OKOK International on the App Store, checked October 18, 2026). OKOK's user agreement describes the HealthKit link more broadly, as sharing OKOK's health data "such as height, weight, blood sugar, blood pressure" to the Health app (OKOK app user agreement). Neither source lists which body-composition values a scale reading sends, so weight is the one item we can document and the permission sheet is your authoritative list.
Weight is also the metric that matters most for a trend, so the documented sync does the essential job. Nothing in the listing or the agreement documents transferring past readings, so check Health after you authorize instead of assuming a backfill.
The ad experience, as reviewers describe it
We describe what App Store reviewers report, with dates, and claim nothing about anyone's intent. Across 2024 and 2025, reviewers on the listing describe full-screen ads appearing when the app opens, close buttons sitting behind the status bar or camera notch where they can't be tapped, video ads playing before a weigh-in can be recorded, and needing to force-quit and relaunch to get past them. Several of those reviewers state they own the connected scale; the listing offers subscription tiers but reviewers note no one-time purchase (review themes on the listing, checked October 18, 2026). The app's overall rating remains high at 4.7 stars across 17K ratings on the US listing — both things are true, and you can read the listing yourself.
How to turn the sync on
The listing's phrase is "with your authorization": OKOK requests Apple Health access through the standard iOS permission sheet. Grant it write access for Weight, and for any other category its sheet offers that you want recorded. If you declined earlier — or aren't sure — you can grant or revoke it yourself: Settings → Health → Data Access & Devices → OKOK, or in the Health app under your profile picture → Apps (Apple's security guide). Then take a weigh-in with the app open and check Health → Browse → Body Measurements → Weight for the new reading.
OKOK scale not syncing to Apple Health?
The OKOK FAQ pages cited here cover getting a reading from the scale into the app, not the handoff to Apple Health; for that last step, use Health's own checks at the end of this list. In order:
- Scale to app. Confirm the scale actually connects to the OKOK International app; OKOK notes that not every scale on the market works with this version. Turn the phone's Bluetooth off and on, weigh again, and check that the scale is bound to this phone (tap Bind Now if it isn't) (OKOK FAQ: no data uploaded).
- Another phone nearby. A scale can be bound to several phones, but OKOK says it connects to only one phone within 10 meters at a time. Turn off Bluetooth on the other phone (OKOK FAQ: multiple phones).
- Still no connection. Restart the scale, then the phone and Bluetooth, and reopen the app (OKOK FAQ: Bluetooth). If readings still never arrive, OKOK says the device may be faulty and to contact the seller (OKOK FAQ: no data uploaded).
- App to Health. In the Health app, tap your profile picture, then Apps, then OKOK, and check that Weight is allowed. If another app also writes weight, open Health's Weight category, then Data Sources & Access, and check the order Apple uses to prioritize them (Apple Support).
The escape logic
Here is the practical payoff, and it's the whole reason to bother: once your weigh-ins land in Apple Health, other compatible apps can read them after you grant each one permission, with no ads in front of them. Apple says the information you gather about yourself in Health is under your control (Apple Support), and you can delete samples there. From that point OKOK has one remaining job: moving the next reading from the scale into Health. If even that trip becomes more trouble than it's worth, the scale still measures: add the reading to Apple Health by hand. Apple's default priority for competing sources lists manually entered data first, then your iPhone, then apps and Bluetooth devices.
What lands where
| What OKOK writes to Apple Health | What Apple Health can store | What Trendline reads from Health |
|---|---|---|
| Weight, per its own description (App Store listing, October 2026). No source we could read lists the other types; check the permission sheet. | Weight, body fat %, lean body mass, BMI, height, waist circumference | Weight, body fat %, lean body mass — with height as context. BMI and waist are not imported. |
Trendline also accepts manual weight and body-fat entries, and clinic-scan reports that can hold composition numbers Health has no type for, like body water.
Try the idea
Day-to-day weight moves for reasons that have nothing to do with progress — that bounce is variation, not a verdict. Paste a few weeks of measurements into the free weight trend calculator (in your browser, nothing uploads) and compare the raw weigh-ins against a deliberately slower signal. That's the reading your history deserves once it's out of the silo.
Questions people ask
What does OKOK International write to Apple Health?
Weight is the documented item: with your authorization "we can synchronize all weight data to your Health app" (OKOK International on the App Store, checked October 18, 2026). OKOK's user agreement also says it shares health data "such as height, weight, blood sugar, blood pressure" to Health, and no source lists the scale composition values it sends.
Which scales use the OKOK International app?
WeGuard's Amazon listing directs buyers to install it, and an App Store reviewer describes pairing a Temu-bought scale with it. OKOK says not every scale on the market works with this app, so check the manual or QR code that came with yours.
How do I allow OKOK to write to Apple Health?
OKOK requests Apple Health access through the standard iOS permission sheet; grant it write access for Weight. If you declined earlier, go to Settings, Health, Data Access & Devices, OKOK, or in the Health app tap your profile picture, then Apps.
Why isn't my OKOK scale syncing to Apple Health?
First confirm the scale connects to the OKOK International app: turn the phone's Bluetooth off and on, weigh again, and check that the scale is bound to this phone (tap Bind Now if it isn't). Then, in the Health app, tap your profile picture, then Apps, then OKOK, and check that Weight is allowed.
Does the OKOK app show ads?
App Store reviewers across 2024 and 2025 describe full-screen ads when the app opens, close buttons that can't be tapped, and video ads before a weigh-in can be recorded. The app's overall rating remains high at 4.7 stars across 17K ratings (review themes on the listing, checked October 18, 2026).
Sources
- OKOK International on the App Store (Health sync scope, review themes, rating)
- OKOK International on Google Play (com.chipsea.btcontrol.en package)
- OKOK app user agreement (HealthKit sharing statement)
- Amazon: WeGuard body fat scale (directs buyers to OKOK)
- Apple: protecting access to Health data (Data Access & Devices)
- OKOK FAQ: why is there no data uploaded after weighing?
- OKOK FAQ: can one scale be bound to multiple phones?
- OKOK FAQ: Bluetooth connection frequently unsuccessful
- Apple Support: manage Health data sources and their order
Trendline is not affiliated with or endorsed by Shenzhen Careyou, Chipsea Technologies, WeGuard, or any scale brand named on this page. Vendor behaviors change; everything above was verified against the linked pages on October 18, 2026, except where the page says we could not read a source.