# N vs LeetCard

The clearest difference is ads: N at none against LeetCard's shown. N also leads on review sentiment (83% vs 54%) and rating (4.7 vs 4.5). LeetCard's advantage is update cadence (every 2 days vs monthly). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. N sells 7 in-app purchases, starting at $8.99 per month and LeetCard sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

N holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 237 and 80 respectively. Written reviews point the same way: 83% of N's written reviews are positive against 54% of LeetCard's.

N ships an update monthly, LeetCard every 2 days. The most recent releases landed on October 12, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | N | LeetCard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (237 ratings)](https://appshunter.io/ios/app/n-back-challenge/id1524599079/reviews)** | [4.5 (80 ratings)](https://appshunter.io/ios/app/leetcard-coding-flashcards/id6478087443/reviews) |
| Number of ratings | **237** | 80 |
| Positive reviews | **82.8% of reviews** | 53.8% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 72 MB | 124 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Rivuspurus](https://appshunter.io/developer/1171945549) | [Kubicle LLC](https://appshunter.io/developer/1679797468) |

## 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


### LeetCard

[App page](https://appshunter.io/ios/app/leetcard-coding-flashcards/id6478087443)

Prepare for coding interviews with AI-powered flashcards and adaptive learning. Master data structures, algorithms, and coding patterns with personalized plans and intelligent hints. Track your progress with detailed analytics to identify weak areas and stay motivated.

**Highlights:** AI-powered hints, Personalized study plans, Smart flashcards, Clean organization, Personalized dashboard, Detailed analytics

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LeetCard Pro | $3.99 | per month |
| LeetCard Pro | $24.99 | per year |
| LeetCard Pro | $39.99 | one-time |


## Frequently asked questions

### Is N free?

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

### Is LeetCard free?

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

### Which has better reviews, N or LeetCard?

N is rated higher. N averages 4.7 out of 5 from 237 ratings, while LeetCard averages 4.5 from 80 ratings.

### Do N or LeetCard have ads?

LeetCard shows ads; N does not.

### Which is updated more often, N or LeetCard?

N ships an update monthly, and LeetCard every 2 days. Most recently, N was updated on October 12, 2026 and LeetCard on October 9, 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.*