# Plus & Minus 2 vs Solar System Clock

The clearest difference is price: Solar System Clock at Free against Plus & Minus 2's $3.99. Solar System Clock also leads on update cadence (every 2 days vs every 8 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Solar System Clock is free to download; Plus & Minus 2 costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Plus & Minus 2 ships an update every 8 months, Solar System Clock every 2 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Plus & Minus 2 | Solar System Clock |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/solar-system-clock/id6746730661/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 days** |
| Size | 62 MB | 5 MB |
| Requires iOS | 17.0 | **16.6** |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Magiwise](https://appshunter.io/developer/690146664) | [Mateusz Andrzejczuk](https://appshunter.io/developer/1158375886) |

## What reviewers say

### Plus & Minus 2

[App page](https://appshunter.io/ios/app/plus-and-minus-2-magiwise/id1491887684)

**In-app purchases:** none


### Solar System Clock

[App page](https://appshunter.io/ios/app/solar-system-clock/id6746730661)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Plus & Minus 2 free?

Plus & Minus 2 costs $3.99, with no in-app purchases.

### Is Solar System Clock free?

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

### Do Plus & Minus 2 or Solar System Clock have ads?

Neither Plus & Minus 2 nor Solar System Clock shows ads.

### Which is updated more often, Plus & Minus 2 or Solar System Clock?

Plus & Minus 2 ships an update every 8 months, and Solar System Clock every 2 days. Most recently, Plus & Minus 2 was updated on October 25, 2026 and Solar System Clock on October 25, 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.*