# Arithmetic HD vs iWrite

The clearest difference is update cadence: iWrite at every 5 weeks against Arithmetic HD's every 9 months. Arithmetic HD's advantage is price ($1.99 vs $5.99) and iOS requirement (12.1 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Arithmetic HD costs $1.99 and iWrite $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Arithmetic HD ships an update every 9 months, iWrite every 5 weeks. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Arithmetic HD | iWrite |
| --- | --- | --- |
| Price | **$1.99** | $5.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 weeks** |
| Size | 17 MB | 25 MB |
| Requires iOS | **12.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kostakov Maxim](https://appshunter.io/developer/524964352) | [Ram Tulugu](https://appshunter.io/developer/1748577009) |

## What reviewers say

### Arithmetic HD

[App page](https://appshunter.io/ios/app/arithmetic-hd/id686967632)

**Features:** macOS Compatibility

**In-app purchases:** none


### iWrite

[App page](https://appshunter.io/ios/app/iwrite-abc-and-123-learning/id6787459368)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Arithmetic HD free?

Arithmetic HD costs $1.99, with no in-app purchases.

### Is iWrite free?

iWrite costs $5.99, with no in-app purchases.

### Do Arithmetic HD or iWrite have ads?

Neither Arithmetic HD nor iWrite shows ads.

### Which is updated more often, Arithmetic HD or iWrite?

Arithmetic HD ships an update every 9 months, and iWrite every 5 weeks. Most recently, Arithmetic HD was updated on November 6, 2026 and iWrite on November 5, 2026.

---

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