# Simple Clock JP vs Big Digital Clock

The clearest difference is in-app purchases: Simple Clock JP at none against Big Digital Clock's 1. Big Digital Clock's advantage is update cadence (every 10 days vs every 4 weeks) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Big Digital Clock sells 1 one-off in-app purchase. Simple Clock JP asks for nothing beyond the download.

Simple Clock JP ships an update every 4 weeks, Big Digital Clock every 10 days. The most recent releases landed on October 4, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Simple Clock JP | Big Digital Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (3 ratings)](https://appshunter.io/ios/app/big-digital-clock-desk-clock/id6809487420/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 10 days** |
| Size | 0 MB | 21 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kantaro Kobayashi](https://appshunter.io/developer/6797092531) | [Hank Wang](https://appshunter.io/developer/6800213367) |

## What reviewers say

### Simple Clock JP

[App page](https://appshunter.io/ios/app/simple-clock-jp/id6805928074)

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

**In-app purchases:** none


### Big Digital Clock

[App page](https://appshunter.io/ios/app/big-digital-clock-desk-clock/id6809487420)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Unlock | $1.99 | one-time |


## Frequently asked questions

### Is Simple Clock JP free?

Simple Clock JP is free to download, with no in-app purchases.

### Is Big Digital Clock free?

Big Digital Clock is free to download, with in-app purchases available.

### Do Simple Clock JP or Big Digital Clock have ads?

Neither Simple Clock JP nor Big Digital Clock shows ads.

### Which is updated more often, Simple Clock JP or Big Digital Clock?

Simple Clock JP ships an update every 4 weeks, and Big Digital Clock every 10 days. Most recently, Simple Clock JP was updated on October 4, 2026 and Big Digital Clock 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.*