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Terms of Use

Welcome to PerfLog ("the app", "the service"). These Terms of Use ("Terms") govern your use of the PerfLog mobile application developed by Vincent BERHOUET ("we", "our", "us"). By downloading, installing or using the app, you agree to be bound by these Terms. If you do not accept these Terms, do not use the app.

This English text is a translation provided for convenience; the service is governed by French law and the French version prevails in case of any discrepancy.

1. Service description

PerfLog is a mobile strength-training tracking app that lets the user:

• Browse a curated exercise catalogue (≈ 400 exercises)
• Create custom training programs
• Log sessions, sets, reps and loads
• Track progress through statistics (PRs, tonnage, frequency)
• Back up data to an end-to-end encrypted cloud (optional, opt-in)
• Restore data on another device

The app is available on iOS and Android.

2. User account

2.1 Local mode

By default, using PerfLog requires no account or sign-up. All data stays locally on your device, isolated in the app's sandbox and encrypted at rest by the operating system (Data Protection AES-256 on iOS, File-Based Encryption on Android 7+).

2.2 Cloud mode (opt-in)

If you enable the Cloud Backup feature, you must:

• Provide a valid email address (used for OTP authentication)
• Set a strong passphrase (≥ 12 characters) that you alone know
• Keep your 12-word recovery code (generated per BIP-39)

Important: we have no access to your passphrase or recovery code. If you lose them, your encrypted data is unrecoverable (E2E architecture). That is the price of privacy.

2.3 Account security

You are responsible for:

• The confidentiality of your passphrase
• Keeping your recovery code (paper, password manager, etc.)
• Access to your email inbox (used for OTP login codes)

3. Acceptable use

You agree to:

• Use the app for personal, non-commercial purposes
• Not attempt to circumvent the security mechanisms (cert pinning, encryption)
• Not use the app to store illegal data

We reserve the right to suspend any cloud account that manifestly abuses the service (DoS, intrusion attempts on the APIs).

4. Intellectual property

4.1 Application

The PerfLog application (source code, design, brand) remains the exclusive property of Vincent BERHOUET.

4.2 Exercise catalogue

Part of the built-in exercise catalogue comes from free-exercise-db under the MIT license (attribution kept in the source code). The French translations, descriptions and adaptations are the property of Vincent BERHOUET.

4.3 Your data

You remain the sole owner of the data you enter (programs, sessions, measurements). No assignment is made to us. At any time, you can:

• Export your data in JSON format (Profile → Export)
• Delete your data (Settings → Erase all data)
• Delete your cloud account if enabled (GDPR Art. 17)

5. Limitations of liability

5.1 Medical advice

PerfLog is not medical advice. Exercise descriptions are for information only. Consult a healthcare professional before any training program, especially in case of joint, cardiac or musculoskeletal issues.

We disclaim all liability for injury resulting from the use of the proposed exercises without professional supervision.

5.2 Availability

The app is provided "as is" without warranty of uninterrupted operation. Cloud services may experience temporary outages (Supabase, OVH maintenance, etc.).

5.3 Data loss

Although every effort is made to preserve your data:

• In local mode, loss/reset of the device without cloud backup enabled will cause permanent data loss
• In cloud mode, forgetting both your passphrase AND your recovery code will make your backups unrecoverable (E2E architecture with no backdoor)

We strongly recommend:

• Enabling cloud backup if you care about your data
• Storing your recovery code in a safe place (paper in a safe, 1Password, etc.)
• Performing regular JSON exports as a complement

6. Personal data (GDPR)

The processing of your personal data is detailed in our Privacy Policy.

Summary:

• No analytics tracking, no advertising
• Local data isolated in the app's sandbox, encrypted at rest by the operating system
• Optional cloud backup, end-to-end encrypted
• GDPR rights upheld (access, rectification, erasure, portability, objection)
• EU hosting (Supabase Frankfurt)

To exercise your rights: contact@perflog.app

7. Account and data deletion

7.1 Local deletion

Settings → Data → Erase all data.

Effect: immediate and irreversible erasure of the local database (SQLite file + rows).

7.2 Cloud account deletion

Settings → Cloud backup → Delete my account.

Effect: deletion within 30 days (grace period for cancellation), then effective purge with a GDPR Art. 30 audit (SHA-256 hash kept for 30 days for legal traceability).

7.3 Prolonged inactivity

Cloud accounts inactive for 24 months are automatically marked for deletion with 30 days' notice (email notification). You can extend via the dedicated button in Settings.

8. Changes to the Terms

We may amend these Terms to reflect legal or functional changes. Major changes will be notified through the app or by email (cloud account only).

The "Last updated" date at the top of this document indicates the version in force.

9. Governing law

These Terms are governed by French law. Any dispute will be submitted to the courts having jurisdiction at Vincent BERHOUET's place of residence.

10. Contact

For any question about these Terms:

• Vincent BERHOUET
• Email: contact@perflog.app