# N vs Number Memory 25

The clearest difference is price: N at Free against Number Memory 25's $0.99. N also leads on ratings volume (239 vs 5). Number Memory 25's advantage is rating (5.0 vs 4.7) and device support (4 vs 1). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

N is free to download; Number Memory 25 costs $0.99 up front. N sells 7 in-app purchases, starting at $8.99 per month and Number Memory 25 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Number Memory 25 holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: N has 239 ratings behind it against 5, so its average is the more settled of the two.

N ships an update monthly, Number Memory 25 every 3 weeks. The most recent releases landed on October 16, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | N | Number Memory 25 |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.7 (239 ratings)](https://appshunter.io/ios/app/n-back-challenge/id1524599079/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/number-memory-25/id6448686063/reviews)** |
| Number of ratings | **239** | 5 |
| Positive reviews | 82.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 72 MB | 3 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Rivuspurus](https://appshunter.io/developer/1171945549) | [T&T United Inc.](https://appshunter.io/developer/468282934) |

## What reviewers say

### N

[App page](https://appshunter.io/ios/app/n-back-challenge/id1524599079)

This app offers a scientifically validated cognitive training program designed to enhance intelligence. It uses the dual n-back method to improve learning, reasoning, and problem-solving skills. Track progress, compete with friends, and customize your experience to boost cognitive abilities.

**Highlights:** Dual n-back cognitive training, IQ enhancement, Progress tracking and streaks, Social competition and leaderboards, Customizable voices and settings, Weekly habit option

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (monthly) | $8.99 | per month |
| Premium (annual) | $54.99 | per year |
| 1 cup of coffee | $1.99 | one-time |
| 4 cups of coffee | $5.99 | one-time |
| Pizza | $7.99 | one-time |
| 7  cups of coffee | $8.99 | one-time |
| 10  cups of coffee | $10.99 | one-time |

**What reviewers like**

- 🧠 Effective working memory improvement
- 🎮 Excellent gamification and motivation system
- 💰 Free to use with affordable payment options
- 🎨 Clean, polished, intuitive user interface
- 📚 Scientifically-backed with educational articles

**What reviewers complain about**

- 🐛 Frequent mid-session freezes and crashes
- 🔊 Unclear letter pronunciation (some letters sound similar)
- 💳 Controversial 'coffee' paywall for missed days
- 🔌 Requires internet connection (not offline compatible)
- ⚠️ Inconsistent instant feedback on answers

**Reported bugs**

- Mid-session freezing and soft locks (most common)
- Sound not generating for letters during gameplay
- Buttons greyed out preventing interaction
- App crashes when accessing stats
- Double coffee charge on streak breaks

**Requested features**

- Single n-back and quad n-back modes
- Lock screen widgets for streak reminders
- Color-position dual n-back mode
- More granular settings (interference, probability, trial count)
- Penalty system for incorrect answers


### Number Memory 25

[App page](https://appshunter.io/ios/app/number-memory-25/id6448686063)

This brain training app helps improve memory by challenging users to memorize and recall sequences of numbers. Regular, short practice sessions can enhance visual memory and cognitive skills.

**Highlights:** Memorize and recall number sequences, Visual memory training, Daily 30-second practice, Progressive difficulty, Simple, challenging gameplay

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All | Free | one-time |


## Frequently asked questions

### Is N free?

N is free to download, with in-app purchases available.

### Is Number Memory 25 free?

Number Memory 25 costs $0.99, and also offers in-app purchases.

### Which has better reviews, N or Number Memory 25?

Number Memory 25 is rated higher. N averages 4.7 out of 5 from 239 ratings, while Number Memory 25 averages 5.0 from 5 ratings.

### Do N or Number Memory 25 have ads?

Neither N nor Number Memory 25 shows ads.

### Which is updated more often, N or Number Memory 25?

N ships an update monthly, and Number Memory 25 every 3 weeks. Most recently, N was updated on October 16, 2026 and Number Memory 25 on October 2, 2026.

---

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