# MobAlerm vs YonderClock

The clearest difference is price: YonderClock at Free against MobAlerm's $0.49. YonderClock also leads on update cadence (daily vs every 10 days). MobAlerm's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 18.0). On ads and device support there is nothing between them.

YonderClock is free to download; MobAlerm costs $0.49 up front. YonderClock sells 2 in-app purchases, starting at $9.99 per year. MobAlerm asks for nothing beyond the download.

MobAlerm ships an update every 10 days, YonderClock daily. The most recent releases landed on September 24, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | MobAlerm | YonderClock |
| --- | --- | --- |
| Price | $0.49 | **Free** |
| Rating | — | **[2.3 (3 ratings)](https://appshunter.io/ios/app/yonderclock/id6762817899/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Daily** |
| Monetization | — | Freemium |
| Size | 1 MB | 106 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kengo Tate](https://appshunter.io/developer/1458012620) | [Guangzhou Black Box Network Technology Co., Ltd.](https://appshunter.io/developer/1526609856) |

## What reviewers say

### MobAlerm

[App page](https://appshunter.io/ios/app/mobalerm/id6737408995)

**In-app purchases:** none


### YonderClock

[App page](https://appshunter.io/ios/app/yonderclock/id6762817899)

Experience a dynamic view of the world's time zones through real-time 3D aerial perspectives of global landmarks. Watch as the scene changes every 15 minutes, showcasing morning, noon, or dusk across different cities. Collect visited landmarks and see your progress on a world map.

**Highlights:** Real-time 3D aerial views of landmarks, Dynamic scene changes every 15 minutes, Collection of visited landmarks, World map progress tracking, Home screen widget, Unlimited landmark shuffling (PRO)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Year-Pro | $9.99 | per year |
| Buyout-PRO | $16.49 | one-time |


## Frequently asked questions

### Is MobAlerm free?

MobAlerm costs $0.49, with no in-app purchases.

### Is YonderClock free?

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

### Do MobAlerm or YonderClock have ads?

Neither MobAlerm nor YonderClock shows ads.

### Which is updated more often, MobAlerm or YonderClock?

MobAlerm ships an update every 10 days, and YonderClock daily. Most recently, MobAlerm was updated on September 24, 2026 and YonderClock on September 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.*