# Unix TimeStamp vs Solar System Clock

The clearest difference is in-app purchases: Unix TimeStamp at none against Solar System Clock's 1. Unix TimeStamp also leads on iOS requirement (15.6 vs 18.0). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Solar System Clock sells 1 one-off in-app purchase. Unix TimeStamp asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Unix TimeStamp | Solar System Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/unix-timestamp/id6737517840/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 4 MB | 26 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | iPhone, iPod, Mac | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [灿耿 陈](https://appshunter.io/developer/1688324562) | [Sunita George](https://appshunter.io/developer/1777332550) |

## What reviewers say

### Unix TimeStamp

[App page](https://appshunter.io/ios/app/unix-timestamp/id6737517840)

This tool simplifies working with Unix timestamps, offering one-click display and copying. It supports switching between second and millisecond precision, bidirectional conversion to human-readable dates, and multi-time zone conversions.

**Highlights:** One-click timestamp display, One-click copy to clipboard, Second and millisecond precision toggle, Bidirectional timestamp to date conversion, Multi-time zone conversion, Manual data copying

**Features:** Vision Pro support

**In-app purchases:** none


### Solar System Clock

[App page](https://appshunter.io/ios/app/solar-system-clock/id6737652569)

Explore the time and positions of celestial bodies across our solar system. View analog and digital clocks for planets, dwarf planets, and moons, with interactive maps and customizable widgets. Understand planetary seasons and translate times between objects.

**Highlights:** Planet and moon time displays, Analog and digital clock formats, Interactive solar system map, Customizable widgets, Planetary season information, Time translation between celestial bodies

**Features:** macOS Compatibility, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Planets and Dwarf Planets | $2.99 | one-time |


## Frequently asked questions

### Is Unix TimeStamp free?

Unix TimeStamp is free to download, with no in-app purchases.

### Is Solar System Clock free?

Solar System Clock is free to download, with in-app purchases available.

### Do Unix TimeStamp or Solar System Clock have ads?

Neither Unix TimeStamp nor Solar System Clock shows ads.

### Which is updated more often, Unix TimeStamp or Solar System Clock?

Unix TimeStamp ships an update every 6 weeks, and Solar System Clock every 6 weeks. Most recently, Unix TimeStamp was updated on October 8, 2026 and Solar System Clock on October 15, 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.*