# ポケット手帳 vs World Time Calc

The clearest difference is in-app purchases: ポケット手帳 at none against World Time Calc's 1. ポケット手帳 also leads on ads (none vs shown) and update cadence (weekly vs every 6 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. World Time Calc sells 1 one-off in-app purchase. ポケット手帳 asks for nothing beyond the download.

ポケット手帳 ships an update weekly, World Time Calc every 6 weeks. The most recent releases landed on October 19, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | ポケット手帳 | World Time Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/world-time-calc-time-converter/id6472414655/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 6 weeks |
| Monetization | — | Ad-supported |
| Size | 21 MB | 10 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Kento Takise](https://appshunter.io/developer/1553271381) | [Hajime Suzuki](https://appshunter.io/developer/1615906018) |

## What reviewers say

### ポケット手帳

[App page](https://appshunter.io/ios/app/id6471104584)

**In-app purchases:** none


### World Time Calc

[App page](https://appshunter.io/ios/app/world-time-calc-time-converter/id6472414655)

Visualize day/night cycles and working hours across different cities with an interactive timeline. Receive custom notifications for sunrise and sunset. Manually adjust work hours for precise scheduling.

**Highlights:** Day/night and working hour graphs, Automatic time updates, Manual work hour adjustment, Interactive time cursor, Sunrise/sunset alarm notifications

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PremiumPlan | $7.99 | one-time |


## Frequently asked questions

### Is ポケット手帳 free?

ポケット手帳 is free to download, with no in-app purchases.

### Is World Time Calc free?

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

### Do ポケット手帳 or World Time Calc have ads?

World Time Calc shows ads; ポケット手帳 does not.

### Which is updated more often, ポケット手帳 or World Time Calc?

ポケット手帳 ships an update weekly, and World Time Calc every 6 weeks. Most recently, ポケット手帳 was updated on October 19, 2026 and World Time Calc on October 23, 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.*