Privacy Policy

Next-Gen Trainer

Last updated: 24 August 2026

1. Who operates this application

Next-Gen Trainer ("the Application") is developed and operated by Shahar Halperin, an individual developer, and is published at halperin.cc. Contact: [email protected].

2. Scope of the application

The Application is a private, single-user health and training tool. It is operated by and for its developer. There is no public registration, and it does not collect, process or store personal data belonging to members of the public.

3. Google user data the application accesses

With the explicit consent of the signed-in Google Account holder, the Application requests the following read-only Google Health API scopes:

  • googlehealth.activity_and_fitness.readonly — activity, workouts, steps, heart-rate and energy-expenditure records.
  • googlehealth.sleep.readonly — sleep sessions, stages and durations.
  • googlehealth.health_metrics_and_measurements.readonly — body measurements such as weight, body composition and resting heart rate.

All three scopes are read-only. The Application never writes, modifies or deletes data in the user's Google Account.

4. How that data is used

The data is used exclusively to provide the features the user requested:

  • Calculating training load, recovery and readiness scores.
  • Estimating daily energy expenditure and calorie balance.
  • Generating a personal daily training brief and weekly summary.
  • Displaying personal history charts in a private dashboard.

The data is not used for advertising, profiling, credit assessment, or any purpose unrelated to these features.

5. Storage and security

Health data retrieved from Google is stored in a private database on infrastructure controlled solely by the developer, and is accessible only to the account owner. OAuth access and refresh tokens are stored in restricted-permission configuration files on that same infrastructure and are never exposed to any third party or embedded in client-side code. All network transport uses HTTPS/TLS.

6. Data sharing

Google user data is never sold, rented, traded, or transferred to advertisers, data brokers, or any other third party. It is not used to train generalised artificial intelligence or machine-learning models. No human other than the account owner reads the data.

7. Limited Use disclosure

The Application's use and transfer of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements.

8. Data retention and deletion

Health records are retained only while they remain useful for personal trend analysis. The account owner may delete the local database at any time, which permanently removes all stored Google data.

9. Revoking access

Access can be withdrawn at any time from Google Account › Third-party apps & services. Revocation immediately invalidates the Application's tokens and stops all further data retrieval.

10. Children

The Application is not directed at, and is not used by, anyone under 18.

11. Changes to this policy

Material changes will be published on this page with an updated revision date.

12. Contact

Privacy questions or requests: [email protected].

Home Terms of Service

© 2026 Shahar Halperin