# DualBrain+  Brain Training vs Number Join

The clearest difference is price: Number Join at Free against DualBrain+  Brain Training's $1.99. Number Join also leads on ratings volume (202 vs 3) and update cadence (every 5 months vs every 22 months). DualBrain+  Brain Training's advantage is in-app purchases (none vs 1) and ads (none vs shown). On rating, review sentiment, device support and iOS requirement there is nothing between them.

Number Join is free to download; DualBrain+  Brain Training costs $1.99 up front. Number Join sells 1 one-off in-app purchase. DualBrain+  Brain Training asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.3 for DualBrain+  Brain Training against 4.2 for Number Join. That said, the two scores are not equally well evidenced: Number Join has 202 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 74% of DualBrain+  Brain Training's written reviews are positive against 66% of Number Join's.

DualBrain+  Brain Training ships an update every 22 months, Number Join every 5 months. The most recent releases landed on October 27, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | DualBrain+  Brain Training | Number Join |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/dualbrain-plus-brain-training/id371426052/reviews)** | [4.2 (202 ratings)](https://appshunter.io/ios/app/number-join-connect-numbers/id603551538/reviews) |
| Number of ratings | 3 | **202** |
| Positive reviews | **73.8% of reviews** | 66.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 22 months | **Every 5 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 26 MB | 11 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [subkom GmbH](https://appshunter.io/developer/363120138) | [Stanley Lam](https://appshunter.io/developer/453164363) |

## What reviewers say

### DualBrain+  Brain Training

[App page](https://appshunter.io/ios/app/dualbrain-plus-brain-training/id371426052)

Engage in a variety of exciting games designed to challenge your cognitive abilities. Compete against yourself and others on global leaderboards while unlocking achievements. Enjoy a multi-language interface and customizable music options.

**Highlights:** Eight distinct timed games, Three challenging game modes, Multiple difficulty levels, GameCenter leaderboards, Unlockable achievements, Social media sharing, Multi-language support

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

**In-app purchases:** none


### Number Join

[App page](https://appshunter.io/ios/app/number-join-connect-numbers/id603551538)

A logic puzzle game where you fill in missing numbers sequentially, horizontally or vertically. Features multiple difficulty levels, over 500 puzzles, and helpful tools like a "Check" function to highlight errors. It also tracks your best completion times and offers Game Center achievements.

**Highlights:** Fill missing numbers sequentially, Horizontal and vertical paths only, 5 difficulty levels, Over 500 levels, Highlight wrong numbers function, Auto-save progress, Record best completion times

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Full Version | $0.99 | one-time |

**What reviewers like**

- 🧠 Great mind exercise
- 🧩 Fun and challenging puzzle
- 👍 Intuitive and well-thought-out
- 💡 Satisfying gameplay
- ⏳ Good time passer

**What reviewers complain about**

- 🐛 Frequent crashes
- 🖱️ Non-intuitive controls
- 📱 UI issues after updates
- 💰 Unclear monetization
- 🖱️ Small and close undo/redo buttons

**Reported bugs**

- Game crashes upon opening
- Game crashes during gameplay
- Update issues: game alignment, inaccessible older games
- View mode screwed up, nothing lines up
- Congrats window blocks game

**Requested features**

- More puzzles, larger grids (11x11+)
- Ability to set up puzzles from external sources
- More distinguishing colors for tiles
- A 'backwards mode' for reverse number solving
- Different color tiles for next vs. back numbers


## Frequently asked questions

### Is DualBrain+  Brain Training free?

DualBrain+  Brain Training costs $1.99, with no in-app purchases.

### Is Number Join free?

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

### Which has better reviews, DualBrain+  Brain Training or Number Join?

DualBrain+  Brain Training is rated higher. DualBrain+  Brain Training averages 4.3 out of 5 from 3 ratings, while Number Join averages 4.2 from 202 ratings.

### Do DualBrain+  Brain Training or Number Join have ads?

Number Join shows ads; DualBrain+  Brain Training does not.

### Which is updated more often, DualBrain+  Brain Training or Number Join?

DualBrain+  Brain Training ships an update every 22 months, and Number Join every 5 months. Most recently, DualBrain+  Brain Training was updated on October 27, 2026 and Number Join on October 23, 2026.

---

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