# Build vs NumiKids

The clearest difference is in-app purchases: Build at none against NumiKids's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. NumiKids sells 2 in-app purchases, starting at $5.99 per month. Build asks for nothing beyond the download.

Build ships an update fortnightly, NumiKids every 3 weeks. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Build | NumiKids |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/build-a-math/id1521174530/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free | — |
| Size | 1 MB | 13 MB |
| Requires iOS | **17.6** | 18 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Weiran Ye](https://appshunter.io/developer/481592104) | [Gulios](https://appshunter.io/developer/6776302446) |

## What reviewers say

### Build

[App page](https://appshunter.io/ios/app/build-a-math/id1521174530)

This app offers short, focused math drills for addition, subtraction, multiplication, and division. It provides instant feedback and tracks progress through engaging sessions designed for quick practice.

**Highlights:** Short, focused math practice sessions, Master addition, subtraction, multiplication, division, Instant feedback with haptics, color, and sound, Smart question rotation for confidence, Progress tracking and summaries, Works offline, no ads, no accounts

**Features:** macOS Compatibility

**In-app purchases:** none


### NumiKids

[App page](https://appshunter.io/ios/app/numikids/id6776302444)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NumiKids Monthly | $5.99 | per month |
| NumiKids Yearly | $59.99 | per year |


## Frequently asked questions

### Is Build free?

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

### Is NumiKids free?

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

### Do Build or NumiKids have ads?

Neither Build nor NumiKids shows ads.

### Which is updated more often, Build or NumiKids?

Build ships an update fortnightly, and NumiKids every 3 weeks. Most recently, Build was updated on October 1, 2026 and NumiKids on October 12, 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.*