Body Measurements: Track & Log
The short version. Body Measurements is built to keep your data yours.
• Everything you log stays on your device by default.
• No account, no login, no email required.
• No advertising, no third-party tracking, no data brokers. We don't sell or share your data — ever.
• We collect anonymous usage statistics (which screens and actions are used) to improve the app. These are never linked to your identity and never include your measurements or photos. You can turn this off anytime in Settings.
• Optional iCloud sync uses your own private iCloud, which we cannot read. Your progress photos never leave your device.
This app, “Body Measurements: Track & Log” (bundle identifier com.gainlogger.BodyMeasurements), is developed and operated by Vlad Gasin, an individual developer (“we”, “us”, “the developer”). This policy explains what the app does — and does not do — with your information.
For the purposes of the GDPR, the data controller is Vlad Gasin, based in Israel — a country recognised by the European Commission as providing an adequate level of data protection. The only data the developer receives is the anonymous, non-identifying usage analytics described in Section 6 (processed on our behalf by Supabase); all of your personal content — measurements, photos, and health data — stays on your device or in your own iCloud, processed by Apple under Apple's own safeguards. Controller contact: support@gainlogger.app.
The app is a personal body-measurement and progress tracker designed to work on your device. We deliberately built it with no user accounts and no advertising, and we have no access to your measurements, photos, or health data — those never leave your device or your private iCloud. The one exception is anonymous usage analytics: aggregate, non-identifying signals about which features are used, which we collect to decide what to improve. These contain no personal content and are described in full in Section 6. You can turn them off at any time in Settings.
You may choose to enter or capture the following, all of which is stored locally on your device:
We do not collect your name, email address, phone number, precise location, contacts, or any advertising identifier. The anonymous analytics in Section 6 use a random per-install identifier that is not linked to you or your Apple ID and resets if you reinstall the app.
On your device. All measurements, GLP-1 logs, photos, and settings are stored locally on your iPhone (using Apple's on-device database and file storage).
Optional iCloud sync. If you turn on iCloud Sync (a Pro feature, off by default), your measurements and GLP-1 logs are synced through your own private iCloud account so they appear on your other devices. This data lives in your personal iCloud database, managed and encrypted by Apple. We cannot see or access it. You can turn sync off at any time in Settings.
Your progress photos are never synced and never uploaded. They always remain only on the device where you took them.
If you enable Apple Health sync (a Pro feature, off by default and requiring your explicit permission), the app writes supported metrics to Apple Health so your other health apps can use them: weight, waist circumference, height, body mass index (BMI), and body-fat percentage.
This is one-way. The app only writes these values when you log them — it never reads data from Apple Health, and it never modifies or deletes anything in Health. Custom measurements that Apple Health doesn't support (for example chest, hips, or biceps) are not written. You control this permission in the Health app or iOS Settings.
To understand which features are useful and where the app can be improved, we collect anonymous, aggregate usage analytics. This is the only information that ever leaves your device to us.
What we collect:
What we never collect: your actual measurement values, weights, dates of birth, progress photos, GLP-1 details, names, emails, or any free-text you enter. We record that an action happened — never your personal content.
How it works: these events are sent to our analytics database hosted by Supabase (our data processor), where only the developer can read them in aggregate. We do not sell, rent, or share this data, and it is never combined with data from other apps or used to track you across the internet. There are no advertising or third-party tracking SDKs in the app.
Your control: usage analytics are on by default but fully optional. You can turn them off at any time in Settings → Data → “Share anonymous usage data.” When off, no usage events are sent.
There is also no sign-up, login, or account of any kind, and all other network activity is limited to Apple's own services (iCloud, Apple Health, and the App Store for purchases), which you control.
Optional Pro features are sold as in-app purchases handled entirely by Apple's App Store (StoreKit). Apple processes your payment — the app never sees or stores your payment-card details or billing information. The app only receives a confirmation of whether you have an active Pro entitlement. Apple's handling of purchase data is governed by Apple's Privacy Policy.
The app asks for the following permissions only when you use the related feature, and each is optional:
You can grant or revoke any of these at any time in iOS Settings.
The app is not directed to children under 13 (or 16 in the European Economic Area, or the minimum age required in your country), and we do not knowingly collect data from children. Because all data stays on the device under the device owner's control, we never receive any such information.
Because your data lives on your device, you have direct and complete control over it at all times:
Where the GDPR applies, our legal basis for the app's core functionality is your consent and the performance of that functionality (Article 6(1)(a) and (b)); because your personal content stays on your own device and within your own iCloud and Apple Health accounts, the developer does not access, receive, or control it. Our legal basis for the anonymous usage analytics in Section 6 is our legitimate interest in understanding and improving the app (Article 6(1)(f)); because the data is not linked to your identity it is effectively anonymous, and you can switch it off at any time in Settings. If you are in the European Economic Area or the UK, you have rights of access, rectification, erasure, restriction, portability, and objection — for your on-device data you exercise these directly as described above, and for analytics you can opt out in Settings or contact us. If you are a California resident, you have the rights to know, delete, correct, and to non-discrimination, and we do not sell or share your personal information. We also honour your rights under Israel's Protection of Privacy Law. If you have any request we can help with, contact us using Section 13.
We receive none of your personal content — measurements, photos, GLP-1 logs, and health data stay on your device or in your own iCloud until you delete them. To remove everything: delete entries and photos within the app, then delete the app. If iCloud Sync was enabled, remove the app's data from your iCloud account in iOS Settings. The anonymous usage analytics in Section 6 (which contain no personal content) are retained in aggregate to track product trends; you can stop new analytics at any time in Settings, and you may email us to request deletion of analytics associated with your random install identifier.
If we update this policy, we will revise the “Last updated” date above and post the new version at this same URL. Material changes will be reflected here before they take effect.
Questions about this policy or your privacy? Email us at support@gainlogger.app.