# YonderClock vs Plumbline Studio

The clearest difference is price: YonderClock at Free against Plumbline Studio's $0.99. YonderClock also leads on update cadence (daily vs every 10 days). Plumbline Studio's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

YonderClock is free to download; Plumbline Studio costs $0.99 up front. YonderClock sells 2 in-app purchases, starting at $9.99 per year. Plumbline Studio asks for nothing beyond the download.

YonderClock ships an update daily, Plumbline Studio every 10 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | YonderClock | Plumbline Studio |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| 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 | Yes | **No** |
| Ads | No | No |
| Update frequency | **Daily** | Every 10 days |
| Monetization | Freemium | — |
| Size | 106 MB | 3 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Guangzhou Black Box Network Technology Co., Ltd.](https://appshunter.io/developer/1526609856) | [Robert Corbin](https://appshunter.io/developer/1890247992) |

## What reviewers say

### 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 |


### Plumbline Studio

[App page](https://appshunter.io/ios/app/plumbline-studio-level-tool/id6771016320)

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

**In-app purchases:** none


## Frequently asked questions

### Is YonderClock free?

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

### Is Plumbline Studio free?

Plumbline Studio costs $0.99, with no in-app purchases.

### Do YonderClock or Plumbline Studio have ads?

Neither YonderClock nor Plumbline Studio shows ads.

### Which is updated more often, YonderClock or Plumbline Studio?

YonderClock ships an update daily, and Plumbline Studio every 10 days. Most recently, YonderClock was updated on October 24, 2026 and Plumbline Studio on October 24, 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.*