# Synapse: Dual N-Back — Train focus and working memory

> Train focus and working memory (iPhone/iPad app by DAVID KARMJIT GREWAL-SINGH.)

- Source: https://appshunter.io/ios/app/synapse-dual-n-back/id6791672659 (this page in markdown: same URL + `.md`)
- Developer: [DAVID KARMJIT GREWAL-SINGH](https://appshunter.io/developer/1896657816)
- Category: Education
- Price: Free with in-app purchases
- Age rating: 17+
- Requires: iOS 16.0 · 44 MB
- Languages: American English
- Released: 2026-10-29
- Data updated: 2026-10-30

## What is Synapse?

Synapse is a focused dual n-back training app built for short, structured sessions.

Start with an introductory baseline, learn the visual and audio matching task, then build a routine at a level that adapts to your performance.

FEATURES

• Visual and audio dual n-back training
• Quick, Deep and Marathon session options
• Adaptive difficulty
• Personal progress and session history
• Streak tracking and achievements
• Optional reminders
• Local-first design: your training history stays on your iPhone
• No account required

Synapse provides estimated cognitive scores for motivation and progress tracking. These scores are not medical assessments or clinical measurements. Synapse does not diagnose, treat, cure or prevent any condition.

Subscriptions unlock ongoing training. Payment is charged to your Apple ID. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your App Store account settings.

Privacy Policy: https://trysynapseapp.vercel.app/privacy.html
Terms of Service: https://trysynapseapp.vercel.app/terms.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Synapse Weekly | $6.99 | per 7 days |
| Synapse Weekly Offer | $6.99 | per 7 days |
| Synapse Annual | $49.99 | per year |


## Is Synapse safe?

Not enough ratings yet to assess Synapse.

## Is Synapse legit?

Synapse: Dual N-Back has limited verification signals. The AppsHunter Legitimacy Score for Synapse is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-10-29

No release notes.

## More apps by DAVID KARMJIT GREWAL-SINGH

- [Palmlens](https://appshunter.io/ios/app/palmlens/id6769434070)
- [Ironquill](https://appshunter.io/ios/app/ironquill/id6793135278)

All apps by DAVID KARMJIT GREWAL-SINGH: https://appshunter.io/developer/1896657816

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-30.*