# Build vs NumDrill

The clearest difference is ads: Build at none against NumDrill's shown. 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.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 1, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Build | NumDrill |
| --- | --- | --- |
| 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 | No |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free | — |
| Size | 1 MB | 111 MB |
| Requires iOS | **17.6** | 18.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Weiran Ye](https://appshunter.io/developer/481592104) | [KEN ITAKURA](https://appshunter.io/developer/1673182074) |

## 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


### NumDrill

[App page](https://appshunter.io/ios/app/numdrill-math-you-cant-stop/id6752035917)

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

**In-app purchases:** none


## Frequently asked questions

### Is Build free?

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

### Is NumDrill free?

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

### Do Build or NumDrill have ads?

NumDrill shows ads; Build does not.

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

Build ships an update fortnightly, and NumDrill fortnightly. Most recently, Build was updated on October 1, 2026 and NumDrill 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.*