# World Time Shifter Clock vs ProteGM

The clearest difference is ads: ProteGM at none against World Time Shifter Clock's shown. ProteGM also leads on iOS requirement (13.0 vs 18.0). World Time Shifter Clock's advantage is update cadence (every 3 weeks vs every 3 months). On price, in-app purchases and device support there is nothing between them.

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

World Time Shifter Clock ships an update every 3 weeks, ProteGM every 3 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | World Time Shifter Clock | ProteGM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (97 ratings)](https://appshunter.io/ios/app/world-time-shifter-clock/id1499246199/reviews)** | — |
| Number of ratings | **97** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Ad-supported | — |
| Size | 23 MB | 122 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [David Richmond](https://appshunter.io/developer/329944573) | [Multisistemas de Seguirdad Industrial](https://appshunter.io/developer/1016180405) |

## What reviewers say

### World Time Shifter Clock

[App page](https://appshunter.io/ios/app/world-time-shifter-clock/id1499246199)

This app helps you manage time across different time zones for global coordination. Easily plan meetings, stay connected with loved ones, and track events worldwide. Its intuitive display and time-shifting feature make it simple to understand and use.

**Highlights:** Intuitive world clock display, Time shifting for time zone comparison, Meeting scheduling across time zones, Travel time forecasting, Event reminders and notifications

**Features:** macOS Compatibility

**In-app purchases:** none


### ProteGM

[App page](https://appshunter.io/ios/app/protegm/id1502569858)

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

**In-app purchases:** none


## Frequently asked questions

### Is World Time Shifter Clock free?

World Time Shifter Clock is free to download, with no in-app purchases.

### Is ProteGM free?

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

### Do World Time Shifter Clock or ProteGM have ads?

World Time Shifter Clock shows ads; ProteGM does not.

### Which is updated more often, World Time Shifter Clock or ProteGM?

World Time Shifter Clock ships an update every 3 weeks, and ProteGM every 3 months. Most recently, World Time Shifter Clock was updated on October 29, 2026 and ProteGM on October 27, 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.*