Free iPhone app
Your ring. Your phone. Nobody else.
Ringlocket is a free, private companion app for low-cost SmartHealth smart rings. Heart rate, sleep, blood oxygen estimates, breathing, HRV and stress, read straight from the ring and kept on your iPhone. No account, no cloud, no tracking.
These rings cost about as much as lunch, and they measure real things. The app they ship with wants you to create an account first. Ringlocket talks to the ring directly over Bluetooth and keeps everything on your phone, with optional copies to Apple Health and to a backup folder you choose.
Built by one person for himself and his dad. It is free and stays free.
Ringlocket works with rings built on the Yucheng SmartHealth platform. The model name on the listing does not matter (sellers reuse names); what matters is that the box or listing says to use the SmartHealth app. If you pair a ring that is not compatible, Ringlocket tells you right away instead of half-working.
| Ring | Status | Notes |
|---|---|---|
| TK5 | Tested | Our daily ring. Sleep, heart rate, blood oxygen, breathing, HRV, stress, steps. |
| R10M, R11M / R99, R20, R21M | Reported working | Same platform per other developers; we are buying units to confirm. |
| Rings whose listing says "SmartHealth" | Likely | Check the listing for the app name before you buy. |
| SR08 (JRing app) | Not compatible yet | "SR08" is a shared label: some use the JRing app, others QRing. Support for the JRing version is being worked on. |
| QRing / Colmi, Jring / KeepFit, RWfit, LuckRing / TK18, Lefun | Not compatible | Different protocols, even when the ring looks identical. |
Buy links for tested rings will appear here once each listing has been checked with a real unit. Listings change often, so we only link to ones we have verified.
Put the ring on its charger for a minute to wake it, keep it near the phone, and make sure the original SmartHealth app is closed (a ring talks to one app at a time). Then open Ringlocket and tap Connect.
The ring stores readings while you sleep and Ringlocket collects them the next time the app is open and the ring is nearby. If the ring was not worn, or was on the charger, there is nothing to collect.
In Ringlocket, open Data, then Backup, and choose a folder. The app saves a copy once a day. On the new phone, install Ringlocket and tap "Restore from a backup".
No. A ring's optical sensor gives useful trends, especially for heart rate and sleep, but blood pressure and blood oxygen from a ring are estimates. Ringlocket is a wellness app, not a medical device.
Email support@peaksummitlabs.com. A real person reads it.
Last updated: 2026-11-14 (app renamed Ringlocket; workout routes and location, optional Apple Maps, air pressure, marked moments, full Apple Health list)
Ringlocket is a private, on-device companion app for compatible Bluetooth smart rings. It has no accounts, no servers, no advertising, and no analytics. This page explains exactly what the app touches and where it goes.
Short version: your data stays on your iPhone. Ringlocket never sends it to the developer or to anyone else.
When you pair a compatible ring over Bluetooth, the app reads the sensor data the ring records:
You can also enter a few details yourself: age, sex, weight, and an optional blood pressure calibration reading from your own cuff. Habit and symptom tags, mood check-ins, caffeine entries, cycle-tracking entries (only if you turn cycle tracking on), workout sessions, and marked moments ("headache at 2:25", with an optional short note) are stored too.
On this ring model, the blood oxygen and breathing-rate values the ring reports are calculated from heart rate rather than measured. Ringlocket labels them "from HR", leaves them out of its scores and alerts, and does not write them to Apple Health.
Ringlocket makes no network connections of its own. It includes no third-party SDKs: no analytics, no crash reporting, no advertising, no tracking. The only web links in the app (this page and the list of compatible rings) open in Safari when you tap them. One optional exception: if you turn on Settings > Workout routes > Show Apple Maps under routes (off by default), Apple's MapKit downloads map images from Apple Maps for the area your route covers, so Apple can see roughly which area you looked at. Your route itself is never sent. With the setting off, routes are drawn as a plain line and nothing is loaded.
When you start a walk, run, ride or hike, Ringlocket asks for your location (While Using the App) and records your route with the phone's GPS until you end the workout. Recording continues with the screen locked during that workout, and iOS shows the blue location indicator while it does. Location is never used at any other time. The route is stored on your phone and, if you allow it, saved to Apple Health with the workout (as a workout route and distance).
When you mark a moment, Ringlocket reads the air pressure from your iPhone's barometer (iOS asks for Motion & Fitness access the first time), and after that it takes a pressure reading when you open the app, so it can show whether the weather was changing around the moment. Readings are kept on your phone for 14 days. No motion or activity data is read.
If you allow it, Ringlocket connects to Apple Health.
You choose each category in the iOS permission sheet and can change it at any time in Settings > Health > Data Access & Devices > Ringlocket. The app keeps working with Health access denied.
Health data is used only to show you your own information inside the app. It is never used for advertising, marketing, or data mining, and it is never shared with third parties. Ringlocket does not use iCloud itself. Your data only leaves the app as a file you export or a backup folder you choose (see Backups).
If you enable alerts, Ringlocket schedules local notifications on your phone (for example when two readings in a row fall outside limits you set). They are generated on the device. Nothing is sent to a notification server.
Ringlocket can create CSV, JSON, and PDF files of your data. This happens only when you tap an export or share button, and the file goes only where you send it using the standard iOS share sheet (Files, AirDrop, Mail, and so on). Once you share a file, the receiving app or person is governed by their own policies.
You can choose a folder in the Files app and Ringlocket will save a copy of your history there once a day, as a single file, so you can restore it on a new phone. Where that folder lives (on the phone, on a drive, or in a cloud service you use) is your choice, and you can stop at any time. Ringlocket never sends the file anywhere else.
If you use iCloud Backup or an encrypted Finder/iTunes backup for your whole device, the app's data may be included in that device backup, like any other app's data. That backup is controlled by your Apple settings, not by Ringlocket.
None. Ringlocket has no developer-operated servers and shares nothing with third parties. Apple's own frameworks (Bluetooth, HealthKit, notifications, Core Location for workout routes, Core Motion for air pressure) operate on your device under your permissions. The one exception that involves Apple's servers is the optional Apple Maps background for routes, described above.
Ringlocket is not directed to children under 13 and collects nothing from anyone.
Ringlocket is for general wellness and informational use. It is not a medical device, does not diagnose, treat, cure, or prevent any condition, and its readings and estimates (including blood pressure, blood oxygen, sleep, and scores) can be wrong. Do not use it to make medical decisions. Talk to a qualified healthcare professional about health concerns, and call your local emergency number in an emergency.
If this policy changes, the new version will be posted at the same address with a new date. Because the app collects nothing off your device, a material change would require an app update that you would have to install.
Questions: support@peaksummitlabs.com