# World Clock vs あとで買うたぶん

The clearest difference is in-app purchases: あとで買うたぶん at none against World Clock's 1. あとで買うたぶん also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 6 weeks). World Clock's advantage is iOS requirement (15.0 vs 18.0). On price and device support there is nothing between them.

Both are free to download. World Clock sells 1 one-off in-app purchase. あとで買うたぶん asks for nothing beyond the download.

World Clock ships an update every 6 weeks, あとで買うたぶん every 3 weeks. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | World Clock | あとで買うたぶん |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (14 ratings)](https://appshunter.io/ios/app/world-clock-time-converter/id622366157/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 77.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Ad-supported | — |
| Size | 6 MB | 2 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yuki Fukui](https://appshunter.io/developer/575924491) | [Yuka Yasuda](https://appshunter.io/developer/1624485955) |

## What reviewers say

### World Clock

[App page](https://appshunter.io/ios/app/world-clock-time-converter/id622366157)

Easily calculate time differences worldwide by scrolling a dynamic time bar. Add any city, set specific dates and times, and plan international meetings or calls effortlessly. The app syncs with iOS time data.

**Highlights:** Dynamic time bar for instant difference calculation, Add and manage multiple cities, Direct date and time specification, Customizable city names, Syncs with iOS time data

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Advertisement | $1.99 | one-time |


### あとで買うたぶん

[App page](https://appshunter.io/ios/app/id6799799716)

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

**In-app purchases:** none


## Frequently asked questions

### Is World Clock free?

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

### Is あとで買うたぶん free?

あとで買うたぶん is free to download, with no in-app purchases.

### Do World Clock or あとで買うたぶん have ads?

World Clock shows ads; あとで買うたぶん does not.

### Which is updated more often, World Clock or あとで買うたぶん?

World Clock ships an update every 6 weeks, and あとで買うたぶん every 3 weeks. Most recently, World Clock was updated on October 26, 2026 and あとで買うたぶん 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.*