# OnlyWeekNo. vs Korean Age Calculator

The clearest difference is in-app purchases: Korean Age Calculator at none against OnlyWeekNo.'s 1. Korean Age Calculator also leads on update cadence (every 3 days vs every 2 months). OnlyWeekNo.'s advantage is iOS requirement (16.0 vs 18.2). On price, ads and device support there is nothing between them.

Both are free to download. OnlyWeekNo. sells 1 one-off in-app purchase. Korean Age Calculator asks for nothing beyond the download.

OnlyWeekNo. ships an update every 2 months, Korean Age Calculator every 3 days. The most recent releases landed on October 27, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | OnlyWeekNo. | Korean Age Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 3 days** |
| Size | 4 MB | 8 MB |
| Requires iOS | **16.0** | 18.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takenori Kabeya](https://appshunter.io/developer/289913597) | [Silverlute Company](https://appshunter.io/developer/1791745165) |

## What reviewers say

### OnlyWeekNo.

[App page](https://appshunter.io/ios/app/onlyweekno/id6448488587)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Disable Advertising | $0.49 | one-time |


### Korean Age Calculator

[App page](https://appshunter.io/ios/app/korean-age-calculator/id6740816261)

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

**In-app purchases:** none


## Frequently asked questions

### Is OnlyWeekNo. free?

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

### Is Korean Age Calculator free?

Korean Age Calculator is free to download, with no in-app purchases.

### Do OnlyWeekNo. or Korean Age Calculator have ads?

Both OnlyWeekNo. and Korean Age Calculator show ads.

### Which is updated more often, OnlyWeekNo. or Korean Age Calculator?

OnlyWeekNo. ships an update every 2 months, and Korean Age Calculator every 3 days. Most recently, OnlyWeekNo. was updated on October 27, 2026 and Korean Age Calculator on November 2, 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.*