# NBack for iPad vs Callan App

The clearest difference is review sentiment: NBack for iPad at 50% against Callan App's 0%. NBack for iPad also leads on rating (5.0 vs 1.0). Callan App's advantage is price (Free vs $2.99) and update cadence (every 6 weeks vs every 12 months). On ratings volume, ads and in-app purchases there is nothing between them.

Callan App is free to download; NBack for iPad costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

NBack for iPad holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 50% of NBack for iPad's written reviews are positive against 0% of Callan App's.

NBack for iPad ships an update every 12 months, Callan App every 6 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | NBack for iPad | Callan App |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nback-for-ipad/id504739398/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/callan-app/id1099785360/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 6 weeks** |
| Monetization | Paid | **Free** |
| Size | 3 MB | 22 MB |
| Requires iOS | 18.2 | **14.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [Callan Online Ltd](https://appshunter.io/developer/1099785359) |

## What reviewers say

### NBack for iPad

[App page](https://appshunter.io/ios/app/nback-for-ipad/id504739398)

This application offers a cognitive training tool designed to enhance working memory and mental acuity. It utilizes the N-Back task, a scientifically recognized method for improving cognitive abilities. Users can train their memory through various levels of difficulty.

**Highlights:** Working memory training, N-Back task implementation, Multiple difficulty levels (1'Back to 10'Back), Cognitive ability enhancement, iPad optimized

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Callan App

[App page](https://appshunter.io/ios/app/callan-app/id1099785360)

This app provides audiobooks and eBooks for students enrolled in Callan Accredited Schools. It offers practice areas for recording answers, dictations, and exercises to enhance language skills. Courses are available for General English, Business English, Children's English, and General Spanish.

**Highlights:** Audiobook and eBook access, Question and Answer recording, Dictation practice, Exercise testing, Multiple language courses

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NBack for iPad free?

NBack for iPad costs $2.99, with no in-app purchases.

### Is Callan App free?

Callan App is free to download, with no in-app purchases.

### Which has better reviews, NBack for iPad or Callan App?

NBack for iPad is rated higher. NBack for iPad averages 5.0 out of 5 from 1 ratings, while Callan App averages 1.0 from 1 ratings.

### Do NBack for iPad or Callan App have ads?

Neither NBack for iPad nor Callan App shows ads.

### Which is updated more often, NBack for iPad or Callan App?

NBack for iPad ships an update every 12 months, and Callan App every 6 weeks. Most recently, NBack for iPad was updated on November 1, 2026 and Callan App on November 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*