# Number Series for kids vs Missing Num

The clearest difference is ads: Number Series for kids at none against Missing Num's shown. Number Series for kids also leads on iOS requirement (9.0 vs 15.6). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Number Series for kids ships an update every 21 months, Missing Num every 11 months. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Number Series for kids | Missing Num |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/number-series-for-kids/id722797784/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 21 months | **Every 11 months** |
| Monetization | Free | — |
| Size | 11 MB | 8 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Alakmalak](https://appshunter.io/developer/406782291) | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) |

## What reviewers say

### Number Series for kids

[App page](https://appshunter.io/ios/app/number-series-for-kids/id722797784)

This educational game helps children practice speedy calculation accuracy by identifying missing numbers in various series. It offers customizable game settings and four distinct difficulty levels to suit each child's expertise.

**Highlights:** Speedy calculation practice, Identify missing numbers, Customizable game settings, Four difficulty levels, Continuous number series, Odd and even number series

**Features:** macOS Compatibility

**In-app purchases:** none


### Missing Num

[App page](https://appshunter.io/ios/app/missing-num/id868026877)

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

**In-app purchases:** none


## Frequently asked questions

### Is Number Series for kids free?

Number Series for kids is free to download, with no in-app purchases.

### Is Missing Num free?

Missing Num is free to download, with no in-app purchases.

### Do Number Series for kids or Missing Num have ads?

Missing Num shows ads; Number Series for kids does not.

### Which is updated more often, Number Series for kids or Missing Num?

Number Series for kids ships an update every 21 months, and Missing Num every 11 months. Most recently, Number Series for kids was updated on October 23, 2026 and Missing Num on October 25, 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.*