# CalculatorRed vs Clock Stamp

The clearest difference is update cadence: Clock Stamp at every 2 days against CalculatorRed's every 4 weeks. CalculatorRed's advantage is iOS requirement (17.0 vs 26.2). 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.

CalculatorRed ships an update every 4 weeks, Clock Stamp every 2 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CalculatorRed | 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 | No | No |
| Update frequency | Every 4 weeks | **Every 2 days** |
| Monetization | — | Free |
| Size | 1 MB | 4 MB |
| Requires iOS | **17.0** | 26.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kodwerk Software Ltd.](https://appshunter.io/developer/1741040469) | [Zhicheng Chen](https://appshunter.io/developer/6800348339) |

## What reviewers say

### CalculatorRed

[App page](https://appshunter.io/ios/app/calculatorred/id6496602010)

**Features:** macOS Compatibility

**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 CalculatorRed free?

CalculatorRed 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 CalculatorRed or Clock Stamp have ads?

Neither CalculatorRed nor Clock Stamp shows ads.

### Which is updated more often, CalculatorRed or Clock Stamp?

CalculatorRed ships an update every 4 weeks, and Clock Stamp every 2 days. Most recently, CalculatorRed was updated on November 8, 2026 and Clock Stamp on October 31, 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.*