# Number Master vs Arrow Harbor Chain

The clearest difference is in-app purchases: Number Master at none against Arrow Harbor Chain's 7. Number Master also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). Arrow Harbor Chain's advantage is update cadence (weekly vs every 2 weeks). On price and device support there is nothing between them.

Both are free to download. Arrow Harbor Chain sells 7 one-off in-app purchases. Number Master asks for nothing beyond the download.

Number Master ships an update every 2 weeks, Arrow Harbor Chain weekly. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Number Master | Arrow Harbor Chain |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Weekly** |
| Size | 63 MB | 304 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Nguyen Pham Tuan Hoang](https://appshunter.io/developer/1722632422) | [RECRE8BOX](https://appshunter.io/developer/1815455727) |

## What reviewers say

### Number Master

[App page](https://appshunter.io/ios/app/number-master-brain-training/id6753109959)

**Features:** macOS Compatibility

**In-app purchases:** none


### Arrow Harbor Chain

[App page](https://appshunter.io/ios/app/arrow-harbor-chain/id6809627420)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 500 Coins | $0.99 | one-time |
| Booster Pack | $1.99 | one-time |
| No Ads | $2.99 | one-time |
| 1500 Coins | $2.99 | one-time |
| Starter Bundle | $4.99 | one-time |
| Growth Pass | $4.99 | one-time |
| 4000 Coins | $6.99 | one-time |


## Frequently asked questions

### Is Number Master free?

Number Master is free to download, with no in-app purchases.

### Is Arrow Harbor Chain free?

Arrow Harbor Chain is free to download, with in-app purchases available.

### Do Number Master or Arrow Harbor Chain have ads?

Arrow Harbor Chain shows ads; Number Master does not.

### Which is updated more often, Number Master or Arrow Harbor Chain?

Number Master ships an update every 2 weeks, and Arrow Harbor Chain weekly. Most recently, Number Master was updated on October 30, 2026 and Arrow Harbor Chain on November 5, 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.*