# Harumath vs Sumday

The clearest difference is ads: Harumath at none against Sumday's shown. Harumath also leads on update cadence (every 3 days vs every 11 days). Sumday's advantage is iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Harumath sells 2 in-app purchases, starting at $4.99 per month and Sumday sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Harumath ships an update every 3 days, Sumday every 11 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Harumath | Sumday |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 11 days |
| Monetization | — | Free with in-app purchases |
| Size | 7 MB | 34 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [YE HEON GWON](https://appshunter.io/developer/1872877216) | [TON CO., LTD.](https://appshunter.io/developer/6796677381) |

## What reviewers say

### Harumath

[App page](https://appshunter.io/ios/app/harumath-speed-math-sprints/id6765876660)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 하루암산 Pro 월간 | $4.99 | per month |
| 하루암산 Pro 연간 | $29.99 | per year |


### Sumday

[App page](https://appshunter.io/ios/app/sumday-mental-math-practice/id6802302480)

Sharpen your number sense with daily mental math exercises. This app offers quick arithmetic practice, practical math tricks, and progress tracking to improve your speed and accuracy in just five minutes a day.

**Highlights:** Daily arithmetic questions, Adaptive difficulty levels, Mental math technique cards, Progress tracking and reports, Streak tracking, Offline functionality

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sumday Premium | $3.99 | one-time |


## Frequently asked questions

### Is Harumath free?

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

### Is Sumday free?

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

### Do Harumath or Sumday have ads?

Sumday shows ads; Harumath does not.

### Which is updated more often, Harumath or Sumday?

Harumath ships an update every 3 days, and Sumday every 11 days. Most recently, Harumath was updated on October 24, 2026 and Sumday 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.*