# NUMEN vs Sumday

The clearest difference is in-app purchases: NUMEN at none against Sumday's 1. NUMEN also leads on ads (none vs shown). Sumday's advantage is update cadence (every 9 days vs every 5 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Sumday sells 1 one-off in-app purchase. NUMEN asks for nothing beyond the download.

NUMEN ships an update every 5 weeks, Sumday every 9 days. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | NUMEN | Sumday |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 34 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Byoungho Kim](https://appshunter.io/developer/1888452963) | [TON CO., LTD.](https://appshunter.io/developer/6796677381) |

## What reviewers say

### NUMEN

[App page](https://appshunter.io/ios/app/numen-feel-math-again/id6767151538)

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

**In-app purchases:** none


### 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 NUMEN free?

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

### Is Sumday free?

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

### Do NUMEN or Sumday have ads?

Sumday shows ads; NUMEN does not.

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

NUMEN ships an update every 5 weeks, and Sumday every 9 days. Most recently, NUMEN was updated on October 16, 2026 and Sumday on October 13, 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.*