# Solar System Clock vs Ringy Alarm

The clearest difference is in-app purchases: Ringy Alarm at none against Solar System Clock's 1. On price, update cadence, ads and device support there is nothing between them.

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

Solar System Clock ships an update every 6 weeks, Ringy Alarm monthly. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Solar System Clock | Ringy Alarm |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 26 MB | 35 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Sunita George](https://appshunter.io/developer/1777332550) | [ELYES SELLAMI](https://appshunter.io/developer/6785517209) |

## What reviewers say

### 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 |


### Ringy Alarm

[App page](https://appshunter.io/ios/app/ringy-alarm/id6785517207)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solar System Clock free?

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

### Is Ringy Alarm free?

Ringy Alarm is free to download, with no in-app purchases.

### Do Solar System Clock or Ringy Alarm have ads?

Neither Solar System Clock nor Ringy Alarm shows ads.

### Which is updated more often, Solar System Clock or Ringy Alarm?

Solar System Clock ships an update every 6 weeks, and Ringy Alarm monthly. Most recently, Solar System Clock was updated on October 15, 2026 and Ringy Alarm on October 14, 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.*