Privacy Policy

This Privacy Policy explains how Arrakis Studios (“Synapse,” “we,” “us”) handles information in connection with the Synapse iPhone app (the “App”). By using the App you agree to the practices described here.

The short version

1. Information we do not collect

• We do not require or create an account.
• We do not ask for your name, email address, phone number, or date of birth as personal identifiers.
• We do not collect your photos, contacts, precise location, or microphone audio. Analytics and attribution providers may infer an approximate region from network information.
• We do not sell your personal information. With your tracking permission, we share limited advertising attribution data as described below.

2. Information stored on your device

Your complete training history and settings are stored locally on your iPhone. We do not operate a server that backs up this database. It contains:

• Your baseline cognitive test and every training session.
• Your cognitive index, sub-scores, streaks, and achievements.
• App settings and progress.

Summary training metrics are sent to our analytics provider as described below; this is not a backup of your training history. If you delete the App, its local database is removed. We cannot restore that database.

3. Pseudonymous analytics

To understand how the App is used and to improve it, we collect usage events through PostHog (a product-analytics provider) — for example: a session was completed, a screen was viewed, a paywall was shown.

• These events are associated with a persistent random app identifier rather than your name, email, or Apple ID. We use the same identifier to connect product analytics with subscription records and, if tracking is allowed, attribution records. The identifier is stored in the iPhone Keychain and may survive reinstalling the App.
• Events include onboarding answers (age range, training goals, self-rated sharpness, selected blockers such as fatigue or stress, target score and training frequency), summary training metrics, milestones, and paywall interactions. Session summaries can include the training mode and style, outcome, difficulty and progression, duration, accuracy, average correct-response reaction time, hits, misses, false alarms, completed blocks or trials, in-app scores and score changes, and Arcade combos and Brakes used.
• We use these events to understand onboarding, training, retention and subscription conversion. We can inspect event histories associated with a random identifier when investigating problems.
• Events include the app name, version, build and production/test environment. Synapse shares a US-hosted PostHog project with our other app, Iron Quill; reports distinguish the apps.
• Analytics are collected automatically, including after upgrading from an older version with analytics turned off. The App does not offer an analytics opt-out switch. Profile links to this privacy policy. Apple's tracking permission controls advertising attribution. Refusing it does not turn off PostHog product analytics or subscription processing.

3a. Advertising attribution

We use AppsFlyer to measure which marketing channels lead to installs, training activity and subscriptions. We request Apple's tracking permission before starting this measurement.

If you allow tracking, AppsFlyer may receive advertising and vendor identifiers, a pseudonymous app/customer identifier, device and network information, and install and limited engagement events. RevenueCat can send verified subscription and revenue events to AppsFlyer. Enabled advertising partners may receive attribution and conversion data to measure campaign performance.

If you refuse or restrict tracking, we disable advertising/vendor identifier collection, enable AppsFlyer anonymisation, block partner sharing and remove the RevenueCat-to-AppsFlyer identifier. Limited anonymised measurement and Apple's aggregate attribution may remain available. We do not send your onboarding answers, cognitive scores or detailed training results to AppsFlyer.

You can change tracking permission in iPhone Settings → Privacy & Security → Tracking. We recheck permission when you return to the App. Changes to RevenueCat's server-side sharing take effect after the App syncs; permission changes cannot recall events already delivered.

4. Crash and diagnostic data

If the App crashes or hits an error, we may receive a report through Sentry to help us diagnose and fix the problem. Reports may include device model, OS version, performance information, and technical error details. We do not attach your training database, screenshots, or the persistent identifier used for PostHog and RevenueCat.

5. Subscriptions and payments

Synapse offers auto-renewing subscriptions. Purchases are processed by Apple and managed through RevenueCat, which validates your subscription receipt and tells the App whether your subscription is active.

• We never see or store your payment card or billing details — Apple handles all billing.
• RevenueCat associates your subscription with the same random device/app identifier described above, not with personal contact information. Subscription lifecycle and revenue events may also be sent to PostHog to understand conversion and retention.
• The App enables Apple Ads attribution through RevenueCat using Apple's AdServices token. This helps associate eligible ad-driven installs with campaigns and subscriptions. AppsFlyer attribution follows the tracking choices described above.
• You manage or cancel your subscription in Settings → Apple ID → Subscriptions on your iPhone.

6. Third-party services

The App relies on these providers, each of which processes limited data as described above under its own privacy policy:

Provider	Purpose	What it receives
Apple App StorePolicy ↗	App distribution & billing	Purchase and subscription, handled by Apple
RevenueCatPolicy ↗	Subscription entitlement & revenue attribution	Pseudonymous app/device identifier, subscription status, Apple attribution token and, with tracking permission, AppsFlyer identifier
AppsFlyerPolicy ↗	Marketing attribution	Install, engagement and permitted subscription events, device/network information and permitted identifiers
PostHogPolicy ↗	Product analytics	Usage events tied to a random identifier
SentryPolicy ↗	Crash/error diagnostics	Crash and device-technical data

We do not control, and are not responsible for, these providers' own privacy practices.

7. Legal basis (UK/EU users)

Where the UK GDPR or EU GDPR applies, we rely on our legitimate interest in operating and improving the App for analytics and diagnostics, and on performance of a contract with you for providing subscriptions. For questions or requests about this processing, contact us using the details below.

8. How long we keep data

• On-device data stays until you delete it or uninstall the App.
• Pseudonymous analytics and crash data are retained by our providers according to the applicable service retention settings. Uninstalling the App does not delete data already sent to providers.

9. Your choices and rights

• Contact us about analytics or to exercise your applicable data rights using the details below.
• Delete local app data by uninstalling the App. This does not cancel your subscription or erase provider-held records.
• Provider records use pseudonymous identifiers, so we may need additional information to locate your records. Depending on where you live (for example under the GDPR or CCPA/CPRA), you may have rights regarding personal data; contact us at the address below and we will help where technically possible.

10. Security

Your training data is stored on your device and protected by your iPhone's built-in security. Data sent to our service providers is encrypted in transit. No method of storage or transmission is 100% secure, but we work to protect your information.

11. Children

Synapse is intended for adults and is not directed to children under 13 (or the minimum age in your country). We do not knowingly collect personal information from children.

12. International users

The App and its service providers may process data in countries other than where you live, including the United States. By using the App you understand that data may be processed in these locations.

13. Changes to this policy

We may update this Policy from time to time. We will revise the “Last updated” date above, and material changes will be reflected in the App or on this page.

14. Contact

Questions about this Policy or your privacy? Contact Arrakis Studios — Contact support.