# EFOS Mobile vs BettyTime World Clock

The clearest difference is update cadence: BettyTime World Clock at daily against EFOS Mobile's every 3 weeks. On price, ads, 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.

EFOS Mobile ships an update every 3 weeks, BettyTime World Clock daily. The most recent releases landed on October 7, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | EFOS Mobile | BettyTime World Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Size | 148 MB | 18 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Evoke Systems Limited](https://appshunter.io/developer/688865272) | [TIMOTHY GORDON SKIPPER](https://appshunter.io/developer/6796403020) |

## What reviewers say

### EFOS Mobile

[App page](https://appshunter.io/ios/app/efos-mobile/id6474130996)

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

**In-app purchases:** none


### BettyTime World Clock

[App page](https://appshunter.io/ios/app/bettytime-world-clock/id6796403018)

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

**In-app purchases:** none


## Frequently asked questions

### Is EFOS Mobile free?

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

### Is BettyTime World Clock free?

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

### Do EFOS Mobile or BettyTime World Clock have ads?

Neither EFOS Mobile nor BettyTime World Clock shows ads.

### Which is updated more often, EFOS Mobile or BettyTime World Clock?

EFOS Mobile ships an update every 3 weeks, and BettyTime World Clock daily. Most recently, EFOS Mobile was updated on October 7, 2026 and BettyTime World Clock on September 21, 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.*