# 光速时钟 vs Clock Stamp

The clearest difference is ads: Clock Stamp at none against 光速时钟's shown. Clock Stamp also leads on update cadence (every 2 days vs every 2 months). 光速时钟's advantage is iOS requirement (17.2 vs 26.2). 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.

光速时钟 ships an update every 2 months, Clock Stamp every 2 days. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 光速时钟 | Clock Stamp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/clock-stamp/id6800348277/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | — | Free |
| Size | 17 MB | 4 MB |
| Requires iOS | **17.2** | 26.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [成都时光赛博科技有限公司](https://appshunter.io/developer/1846792152) | [Zhicheng Chen](https://appshunter.io/developer/6800348339) |

## What reviewers say

### 光速时钟

[App page](https://appshunter.io/ios/app/id6777318497)

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

**In-app purchases:** none


### Clock Stamp

[App page](https://appshunter.io/ios/app/clock-stamp/id6800348277)

This app displays multiple city time zones on a single, elegant clock face. It provides visual context for day, night, and weather in each location, aiding in travel planning and international communication.

**Highlights:** Multiple city time zones, Visual analog world clock, Local time difference display, Weather and day/night context, 12-hour and 24-hour modes, Light and dark appearance

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

**In-app purchases:** none


## Frequently asked questions

### Is 光速时钟 free?

光速时钟 is free to download, with no in-app purchases.

### Is Clock Stamp free?

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

### Do 光速时钟 or Clock Stamp have ads?

光速时钟 shows ads; Clock Stamp does not.

### Which is updated more often, 光速时钟 or Clock Stamp?

光速时钟 ships an update every 2 months, and Clock Stamp every 2 days. Most recently, 光速时钟 was updated on October 28, 2026 and Clock Stamp on October 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*