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SynapseGym

Brain training backed by studies. Not vibes.

SynapseGym comes out of cognitive psychology: Dual N-Back for working memory, Stroop tests for flexibility, attention training. 40+ exercises, 28 languages. 20+ of them are free. Premium is €3.99 a month — less than a coffee.

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SynapseGym
— Screenshots

Screenshots

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SynapseGym

Tech stack

  • Swift
  • │ SwiftUI

Platforms

  • iOS

Tags

  • Health
  • │ Brain Training
  • │ Mental Fitness
— Privacy Policy

Privacy

PRIVACY POLICY - SynapseGym

Your privacy matters. This app is designed with privacy in mind.

1. What Data Does the App Collect?

User-Generated Content (stored locally):

  • Training Results: Performance statistics, scores, progress
  • Training Settings: Difficulty level, exercise selection
  • HealthKit Data: Only when user enables (workouts, heart rate)
  • Apple Watch Data: Training sessions, movement data
  • App Settings: Language, notifications, design
  • Achievements: Earned badges and levels

Data that is NOT collected:

  • No user accounts or registration
  • No analytics or tracking
  • No crash reports
  • No device information
  • No location data
  • No usage statistics
  • No advertising IDs

2. Where is Data Stored?

Primary: Local Storage (iPhone/iPad/Apple Watch)

  • Core Data: All training data and statistics
  • HealthKit: Health data (if enabled)
  • UserDefaults: App settings
  • WatchKit: Apple Watch companion app data

Optional: Via Apple Services

  • HealthKit Sync: Between iOS devices (user-controlled)
  • Watch Sync: Between iPhone and Apple Watch
  • No iCloud: Training data stays local

3. Permissions

Requested Permissions:

  1. HealthKit: "SynapseGym wants to write training data to the Health app"
  2. Apple Watch: For companion app and workout tracking
  3. Notifications: For training reminders (optional)

NO other permissions

  • No camera access
  • No microphone
  • No location
  • No contacts
  • No photo library

4. Data Transmission

Only Apple Services:

  • App Store: For in-app purchases
  • HealthKit: Only when user enables
  • Apple Watch: Secure synchronization
  • No external tracking or analytics

No External Data Transmission:

  • All data stays within Apple ecosystem
  • No third-party services
  • No cloud backup except Apple

5. Legal Compliance

App Store Privacy Label: "Data not collected" (for tracking)

Justification:

  • All data stays local or within Apple services
  • No external data transmission
  • HealthKit is user-controlled and Apple-encrypted

6. Contact

For questions: privacy@synapsegym.app Updated: 2026