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Privacy Policy

This policy explains what personal information MuscleMetric processes, why we use it, which service providers support the app and how you can exercise your privacy rights.

Last updated 15 September 2026UK GDPR aware
On this page
Summary1. Scope2. Information we process3. How we use information4. Legal bases5. Service providers & sharing6. Retention7. Security8. Your rights9. Younger users10. Changes11. Contact & deletion

In short: MuscleMetric processes account information and training information so the app can provide workout planning, logging, history, goals and progress features. Some workout information may be health-related data. We use service providers to operate and monitor the app, and you can contact us to exercise privacy rights or request account/data deletion.

1. Scope of this policy

This Privacy Policy applies when you use the MuscleMetric mobile application, visit this website or otherwise interact with services that link to this policy (together, the "Services").

MuscleMetric is responsible for deciding how personal information described in this policy is processed.

2. Information we process

Account information

When you create or manage an account, we may process information you provide such as your name, email address and username, together with authentication and account-management information.

Workout, progress and fitness information

To provide the core product, we process information you choose to record in MuscleMetric. Depending on how you use the app, this can include training plans, workouts, exercises, sets, repetitions, weights, times, distances, exercise notes, workout history, goals, achievements and progress information derived from your training records.

Some information you choose to enter may be considered health or sensitive information under privacy laws. We process that information only where needed to provide the Services and where an appropriate legal basis applies.

App and technical information

We may process technical and usage information needed to keep the app secure, diagnose problems, understand how features are used and improve reliability. This may include app-version, device, diagnostic, crash or performance information supplied through our infrastructure and monitoring providers.

Push notifications

If you allow notifications, we may process the technical information required to send account or feature-related push notifications. You can control notification permissions through your device settings.

Third-party authentication

If MuscleMetric offers a third-party sign-in method and you choose to use it, the authentication provider may give us basic information needed to create or authenticate your account. The information available depends on the provider and the choices you make with that provider.

3. How we use your information

We process personal information only for legitimate purposes connected to operating MuscleMetric. These purposes may include:

  • creating, authenticating and maintaining your account;
  • providing workout planning, logging, history, goals, achievements and progress features;
  • personalising the fitness experience using information such as your workout history, goals and activity;
  • calculating and displaying progress, trends and historical comparisons from your recorded training;
  • responding to support requests and service enquiries;
  • sending important administrative, security or policy communications;
  • protecting the Services, preventing misuse and maintaining platform integrity;
  • identifying usage trends, diagnosing problems and improving app performance and features; and
  • complying with legal obligations and protecting legal rights where necessary.
MuscleMetric uses recorded information to provide fitness-tracking features. The app is not intended to make medical diagnoses or provide medical treatment.

4. Legal bases for processing

Where UK GDPR, GDPR or similar laws apply, our legal basis depends on the purpose and type of information involved. We may rely on:

  • Performance of a contract — where processing is needed to provide the Services you request, such as account access and core app functionality.
  • Consent — where the law requires your permission, including for certain sensitive information or optional permissions. You can withdraw consent where applicable.
  • Legitimate interests — where reasonably necessary to secure, maintain, analyse and improve the Services and those interests are not overridden by your rights.
  • Legal obligations — where processing is required to comply with law, regulation or lawful requests.
  • Vital interests — in rare circumstances where processing is necessary to protect someone's life or safety.

5. Service providers and when information may be shared

We may share personal information with service providers where they need it to perform services for MuscleMetric. The current policy identifies the following categories and providers:

  • Cloud, database and authentication infrastructure: Supabase.
  • Application infrastructure and delivery: Expo.
  • Performance and error monitoring: Sentry.
  • iOS beta distribution and testing: Apple TestFlight.

These providers process information according to their role in delivering or supporting the Services and their applicable terms and privacy commitments.

We may also disclose information where reasonably necessary to comply with law, respond to lawful requests, protect rights or security, investigate misuse, or in connection with a genuine business transfer such as a merger, financing or acquisition.

6. How long we keep information

We keep personal information only for as long as reasonably necessary for the purposes described in this policy, including while you maintain an account, unless a longer period is required or permitted by law.

When information is no longer needed, we will delete or anonymise it where reasonably possible. Some information may remain for a limited period in backups, security records or records we are legally required to retain.

7. How we protect information

We use reasonable technical and organisational measures designed to protect personal information against unauthorised access, loss, misuse or alteration.

No internet transmission, application or storage system can be guaranteed to be completely secure. You should protect your login credentials and use secure devices and networks where possible.

8. Your privacy rights

Depending on where you live, you may have rights over your personal information. Under UK GDPR and similar laws, these can include rights to:

  • request access to your personal information;
  • ask us to correct inaccurate or incomplete information;
  • request deletion of personal information in applicable circumstances;
  • request restriction of processing;
  • object to certain processing based on legitimate interests;
  • receive certain information in a portable format where applicable; and
  • withdraw consent where processing relies on consent.

We will consider privacy requests in accordance with applicable law. You may also have the right to complain to your local data-protection authority. In the United Kingdom, this is the Information Commissioner's Office (ICO).

9. Younger users

The Services are intended for users aged 13 or over. If you are under 18, you should use MuscleMetric only with the involvement of a parent or legal guardian and where permitted by applicable law.

If you believe personal information has been provided by someone who is not permitted to use the Services, contact us so we can review the situation.

10. Changes to this policy

We may update this policy as MuscleMetric changes, our service providers change or legal requirements develop. The latest revision date is shown at the top of the page. Where appropriate, we may also provide notice of material changes through the app or another reasonable channel.

11. Contact, access and deletion requests

You can contact us with privacy questions or requests to review, update or delete information associated with your account.

MuscleMetricEmail: support.musclemetric@gmail.comWebsite: musclemetric.github.io/musclemetric-legal/Postal contact: 5 The Walled Garden, Badgemore Park, Henley-on-Thames, Oxfordshire RG9 4FL, England

For account deletion, include enough information for us to identify the relevant account. We may need to verify your identity before completing a privacy request.

This page is intended to describe MuscleMetric's current privacy practices clearly. It is not a substitute for legal advice, and the policy should be reviewed by a qualified privacy professional if you require advice about specific regulatory obligations.

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