# London Air vs worldclock.today

The clearest difference is review sentiment: worldclock.today at 100% against London Air's 47%. London Air's advantage is iOS requirement (9.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | London Air | worldclock.today |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/worldclocktoday/id6773991323/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 46.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 179 MB | 1 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [Environmental Research Group-King's College London](https://appshunter.io/developer/358970520) | [Luca Barberis](https://appshunter.io/developer/6773991326) |

## What reviewers say

### London Air

[App page](https://appshunter.io/ios/app/london-air/id358970517)

Monitor air pollution in London with real-time data from over 100 stations. Get interactive maps, personalized site tracking, and push notifications for moderate or high pollution levels. Understand historical air quality trends and objectives.

**Highlights:** Real-time pollution levels, Interactive pollution maps, Push notifications for high pollution, Personalized 'My Sites' tracking, Historical air quality statistics

**Features:** macOS Compatibility

**In-app purchases:** none


### worldclock.today

[App page](https://appshunter.io/ios/app/worldclocktoday/id6773991323)

This app visualizes time zones by replacing clock hands with city names on a single dial. A white center indicates daytime and a dark outer ring signifies nighttime, allowing for quick understanding of global time and who is currently awake. It supports up to eight cities and works offline.

**Highlights:** Cities as clock hands, Day/night indicator, Real-time global time, Supports up to 8 cities, Offline functionality, No account required

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is London Air free?

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

### Is worldclock.today free?

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

### Do London Air or worldclock.today have ads?

Neither London Air nor worldclock.today shows ads.

### Which is updated more often, London Air or worldclock.today?

London Air ships an update every 2 months, and worldclock.today every 2 months. Most recently, London Air was updated on November 1, 2026 and worldclock.today on October 31, 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.*