This Privacy Policy explains how Gym Logbook (“App”, “we”, “us”) handles information when you use the App. By using the App, you acknowledge this Policy. If you do not agree, do not use the App.
Gym Logbook is designed to be local-first: workout logs primarily live on your device. Optional features—sign-in, cloud sync, health export, friends and sharing, community exercise statistics, an optional ad you can choose to watch after a workout, analytics, and crash reporting—process additional data as described below. Two things are worth stating up front: the App never reads your health data except heart rate, and only if you turn that on (section 2.3), and the height, weight, year of birth, and sex used by the optional energy estimate stay on your device unless you sign in, in which case they are also stored with your account so that your devices agree (section 2.2) — and nowhere else.
Depending on how you use the App, we may store locally:
If you sign in with Apple or Google, we process account identifiers and profile metadata needed to authenticate you (such as a user ID, and display name or email when the provider shares them). When cloud sync is enabled for a signed-in account, workout and library data associated with that account may be stored on our cloud backend so you can restore or use it across devices.
Device session information (for example device model, OS version, app version, locale, and last-active time) may be stored to show your signed-in devices and support remote sign-out.
Body values for the energy estimate. If you have turned the optional energy estimate on, the four values it needs — height, weight, year of birth, and sex — are stored with your signed-in account as well, so that a second device you sign in on shows the same figures instead of asking you to enter them again. They are stored as all four together or not at all, and never for a signed-out or guest session. They are never used for advertising or profiling, never included in analytics, and not shared with other users or with any third party. Deleting your account deletes them.
If you enable Health export, the App may write finished workouts to Apple Health (or Health Connect on Android) as workout samples, plus distance when you authorize it.
Heart rate is the only thing the App reads, and only if you turn it on. Health export is otherwise write-only. If you enable the optional heart-rate chart, the App reads heart-rate readings from Apple Health for the minutes of a workout you finished, copies them onto that workout so the chart still works later, and uses the average to estimate the energy cost of the cardio part of that session. While a workout is in progress it also shows your heart rate live: the Gym Logbook app on your Apple Watch reads that workout's readings on the watch and sends them directly to the App on your iPhone, which also reads the same workout's readings from Apple Health. These live readings are held in memory for that workout only — they are not saved, not uploaded and not sent to us; the chart kept with a finished workout still comes from Apple Health. It reads no other kind of health data at any time, it reads nothing for periods you were not training, and it does not monitor your heart rate in the background. With the setting off, the App requests no read access at all, on iPhone or on Apple Watch, and imports nothing.
Heart-rate readings copied this way are stored on your device with the workout, are included if you create a backup file yourself (section 2.9), are never used for advertising or profiling, are never included in analytics, and are not shared with other users or with any third party. Turning the setting off stops all further reading; readings already copied stay with their workouts until you delete those workouts.
Energy is written only if you ask for it twice. If — and only if — you have enabled Health export and turned on the optional energy estimate and granted the energy permission, the App also writes an estimated active energy value for each finished workout. If any of those is off, no energy value is written at all. The figure is an estimate calculated on your device from the height, weight, year of birth, and sex you entered — it is not a measurement, and it is not taken from any sensor. If you also wear a watch that records the same session, both may write energy and your daily totals can count it twice; the App tells you this when you turn the estimate on.
Turning the estimate off stops future writes. It does not remove energy values already written to your health store — you can delete those in the Health app, which is the only place they live.
Apple’s (or Google’s) privacy terms apply to data stored in your health store.
So the App can show which exercises and supersets are commonly trained, a signed-in device adds to shared counters when you finish a workout. Two kinds of counter exist:
Exercises you created yourself are never included in the shared totals — only exercises from our built-in catalog are counted, so a custom exercise name never leaves your device this way. The shared totals record only that a catalog exercise was trained and how much; they do not record when, by whom, or in what workout. The one way a custom exercise's name can reach us is if you deliberately send it — see section 2.5.
If you create your own exercise, the App may ask — after a workout — whether you would like to share it so we can consider adding it to the built-in library. Nothing is sent unless you tap Share. When you do, we receive only the definition of that exercise:
Your workouts, sets, weights, dates, records and body details are never included, and neither is how often you train the exercise. We use what you send only to decide whether to add the exercise to the library and, if we do, to write the library entry — which we author ourselves, in our own words and artwork. What you send is never shown to other users as your words, and we do not publish your name with it.
You can withdraw a suggestion from the App while it is still awaiting review, and you can turn the question off entirely in Account → Preferences. Suggestions are deleted within about 180 days of being reviewed, and when you delete your account.
If you use the friends features, additional information is processed so other people can see what you choose to share with them:
Information you share with a friend is visible to that friend. We cannot un-share something another person has already seen, and removing a friend stops future access rather than erasing what they saw.
If you take part in the streak leaderboards, your score is submitted to Apple Game Center under your Game Center identity, which is managed by Apple and governed by Apple's privacy terms. You control Game Center in iOS Settings, and the App works fully without it.
We may collect anonymized or pseudonymous product analytics (feature usage events) and crash diagnostics to improve reliability. These services may include device and app technical information (such as OS version, app version, and crash stacks). We do not sell your personal information.
If you export or import a backup, the file you choose to share or restore is under your control. We do not receive exported files unless you send them to us yourself.
After you finish a workout, the App may offer you one short video ad that you can choose to watch to support the App. It is the only advertising in the App: there are no banners and nothing appears during a workout. Watching unlocks nothing and skipping it changes nothing. Nothing ad-related happens until you tap Watch an ad — no advertising service is started, no consent form or tracking prompt is shown, and no ad is requested before that tap.
When you do tap it, the ad is provided by Google AdMob, which may fill it through its mediation partners Unity Ads and AppLovin. To show, measure and protect the ad, these providers may collect:
If you allow tracking, ads may be personalised and this information may be linked with data those providers hold from other apps and websites. If you decline, you may still see ads, but they are not personalised using your advertising identifier. Where the law requires it (for example in the EEA and the UK), Google's consent form asks for your choice first, and you can change it at any time in Account → Preferences → Ad privacy choices.
No workout, set, weight, record, body value or heart-rate reading is ever passed to an ad request. The ad providers process the data above under their own privacy policies: Google, Unity and AppLovin.
Where applicable privacy law requires a legal basis, we rely on: performance of a contract (providing the App you request); your consent (for example optional Health access, personalised ads and tracking, or analytics where consent is required); and legitimate interests (security, reliability, and product improvement) that do not override your rights.
We share information only as needed to run the App:
We do not sell personal information. The only data shared for advertising is what our advertising providers collect when you choose to watch an ad, and it is used for personalised advertising only if you allow tracking (section 2.10).
Local data remains on your device until you delete it (including via in-app delete / Recycle Bin flows) or remove the App. Cloud account and synced data are retained while your account is active and for a reasonable period afterward as needed for backups, abuse prevention, or legal obligations. You may request account deletion where the App provides that control; local workouts may remain on device after account deletion unless you remove them separately.
We use industry-standard safeguards appropriate to a consumer fitness logbook (including transport encryption for network requests and provider-managed authentication). No method of transmission or storage is completely secure.
The App is not directed to children under 13 (or the minimum age required in your country). We do not knowingly collect personal information from children. If you believe a child has provided personal information, contact us so we can delete it.
If you use cloud features, your data may be processed in countries where our service providers operate. Where required, we rely on appropriate transfer mechanisms provided by those vendors.
Depending on your location, you may have rights to access, correct, delete, or export personal data, or to object to certain processing. Contact us at davit.ghushchyan@gmail.com or via Support to exercise those rights.
We may update this Privacy Policy. The “Last updated” date will change when we do. Continued use after an update means you acknowledge the revised Policy.
For privacy questions or requests, email davit.ghushchyan@gmail.com or see Support.