Smoky Cat Software Ltd. takes your privacy very seriously. All data entered into or recorded by our apps remains within your control at all times, and is only transmitted from the device at your explicit request, for example sending an email, uploading a file to Dropbox, or automatic backup of your device to iCloud, with the sole exception of the anonymous usage analytics described below. (Connected third-party services such as Strava may make background network requests to maintain your authenticated session.)
What Information does Smoky Cat Software Ltd. collect?
We do not collect any information about you except when you contact us via email or our website, or through the anonymous usage analytics described in the “Analytics and usage data” section below. Data you choose to import from a connected service such as Strava is stored only on your device and is never transmitted to or accessible by Smoky Cat Software Ltd.
How does Smoky Cat Software Ltd. use the information you provide?
Information you provide when contacting us will be used to respond to your query.
Does Smoky Cat Software Ltd. share your information with others?
We do not share your information with third parties except where you explicitly direct us to: for example, when you export a workout to Strava or Dropbox, or back up your device to iCloud, or where required to by law. Data shared in this way is then governed by that service’s own privacy policy.
Changes
From time to time we may make changes to this policy, which will be posted on our website.
Analytics and usage data
To allow us to understand how the app is used and to guide efforts on features we build and improve, the app collects a small amount of anonymous or pseudonymous usage information. This is first-party analytics: it is used only by us to improve the app, and it is never sold, shared for advertising, or combined with data from other companies.
What we collect. Counts of how often certain features are used; which upgrade screen (if any) was shown before a purchase; that a purchase was made; how often the app is launched and brought to the foreground; and basic device information (the device model and operating-system version).
What we never collect through analytics. We do not collect your heart-rate readings or any other health values, we do not collect any data imported from Apple Health, and we do not collect your name, email address, or any account details. The analytics data records that something happened — never any health figure or personal detail.
How it is handled, by region. The destination depends on your App Store country:
- Rest of the World: the app sends counts together with a random installation identifier (a value generated on your device that is not linked to your name, email, or any account) to servers in the United States. This lets us understand patterns over time without identifying you.
- China: the app sends only aggregated, anonymous counts to servers in Hong Kong. No identifier of any kind is attached, and the data cannot be traced back to a device or person.
Your choice. Analytics is on by default, but you can turn it off at any time in the app settings. Turning it off stops all collection and deletes the analytics data stored on your device, including the installation identifier. Deleting the app also clears it.
Retention and location. Analytics data is stored on Amazon Web Services (United States, us-east-1; Hong Kong for the China aggregate, ap-east-1). Records in the United States that include the installation identifier are automatically deleted after about 13 months; the anonymous China aggregate has no fixed schedule.
Strava
Heart Graph can optionally connect to your Strava account. This integration is entirely opt-in and can be disconnected at any time via Settings → Strava → Disconnect.
What data is accessed: When connected, Heart Graph may read your Strava activities (including heart rate, time, distance, activity type and name) solely to allow you to import them into the app. When you choose to, Heart Graph may also export workouts from the app to your Strava account.
How data is used and stored: Strava activities you choose to import are converted into Heart Graph’s own format and stored locally on your device. Once imported, this data is independent of Strava: it is not cached Strava data and is not subject to Strava’s retention requirements. Exported workouts are uploaded to Strava at your request, may involve transferring data outside the UK/EEA, and are thereafter governed by https://www.strava.com/legal/privacy.
Data collected by Strava: When Heart Graph communicates with Strava’s servers, for example during authentication, browsing your activity list, importing, or exporting, Strava may collect data about those interactions, such as which API endpoints were accessed, timestamps, IP addresses, and device or client information. This data is collected by Strava, not by Smoky Cat Software Ltd., and is governed by https://www.strava.com/legal/privacy.
Revoking access: You can disconnect Heart Graph from Strava at any time via Settings → Strava → Disconnect. This removes your Strava credentials from the device. Previously imported workouts are retained as app data unless you delete them manually – you can delete an imported workout at any time by swiping to delete it in the workout list.
Your rights
Smoky Cat Software Ltd. is the data controller for any personal data you provide. Where we process personal data, our legal basis is your consent (for example, connecting your Strava account) or our legitimate interest in responding to your enquiries and in understanding how the app is used in order to improve it (see “Analytics and usage data”). Any data you provide by contacting us is retained only as long as needed to handle your query.
Under the UK GDPR and EU GDPR you have the right to access, correct, erase, restrict, or object to the processing of your personal data, the right to data portability, and the right to withdraw consent at any time. You also have the right to lodge a complaint with the UK Information Commissioner’s Office (ICO) at https://ico.org.uk, or your local supervisory authority.
To exercise any of these rights, contact us via our Support page. Note you can turn off the app’s usage analytics at any time in the app settings; see the “Analytics and usage data” section above.
Contact us
If you have any questions or queries, please contact us using our Support page.
Last updated
19th August 2026