# B vs World Clock...

The clearest difference is in-app purchases: B at none against World Clock...'s 2. World Clock...'s advantage is update cadence (monthly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. World Clock... sells 2 in-app purchases, starting at $1.99 per month. B asks for nothing beyond the download.

B ships an update every 4 months, World Clock... monthly. The most recent releases landed on September 30, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | B | World Clock... |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Monthly** |
| Size | 68 MB | 121 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Alp Mountain](https://appshunter.io/developer/1630775518) | [Olga Ivanova](https://appshunter.io/developer/1733570435) |

## What reviewers say

### B

[App page](https://appshunter.io/ios/app/b-ischool/id6738282264)

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

**In-app purchases:** none


### World Clock...

[App page](https://appshunter.io/ios/app/world-clock/id6751114970)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| timezones_by_oliva_subscription | $1.99 | per month |
| timezones_by_oliva_donation | $1.99 | one-time |


## Frequently asked questions

### Is B free?

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

### Is World Clock... free?

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

### Do B or World Clock... have ads?

Both B and World Clock... show ads.

### Which is updated more often, B or World Clock...?

B ships an update every 4 months, and World Clock... monthly. Most recently, B was updated on September 30, 2026 and World Clock... on October 3, 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.*