# Gas Giants vs Mercury Retrograde Tracker

Gas Giants and Mercury Retrograde Tracker both sit at 4.2 stars, but that hides the real split: 78% of Gas Giants's written reviews are positive against 30% of Mercury Retrograde Tracker's. Gas Giants also leads on in-app purchases (none vs 3) and iOS requirement (10.3 vs 15.6). Mercury Retrograde Tracker's advantage is update cadence (every 3 weeks vs every 6 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Mercury Retrograde Tracker sells 3 in-app purchases, starting at $1.99 per month. Gas Giants asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.2 for Gas Giants against 4.2 for Mercury Retrograde Tracker. Both are backed by a comparable volume of ratings — 25 and 55 respectively. Written reviews are what separate them: 78% of Gas Giants's written reviews are positive against 30% of Mercury Retrograde Tracker's.

Gas Giants ships an update every 6 months, Mercury Retrograde Tracker every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Gas Giants | Mercury Retrograde Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (25 ratings)](https://appshunter.io/ios/app/gas-giants/id397831483/reviews) | **[4.2 (55 ratings)](https://appshunter.io/ios/app/mercury-retrograde-tracker/id6443472258/reviews)** |
| Number of ratings | 25 | **55** |
| Positive reviews | **78.4% of reviews** | 30.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Paid | **Freemium** |
| Size | 58 MB | 29 MB |
| Requires iOS | **10.3** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Software Bisque](https://appshunter.io/developer/397831486) | [Infinite Wave Media, LLC](https://appshunter.io/developer/495187294) |

## What reviewers say

### Gas Giants

[App page](https://appshunter.io/ios/app/gas-giants/id397831483)

Explore the outer planets and their moons through a simulated telescope. View celestial bodies as they appear in real-time or at any specified date and time. Ideal for astronomy enthusiasts and educators.

**Highlights:** Simulated telescope view, Observe Jupiter, Saturn, Uranus, Neptune, View major moons, Real-time celestial positions, Select any date and time, iOS compatible

**In-app purchases:** none


### Mercury Retrograde Tracker

[App page](https://appshunter.io/ios/app/mercury-retrograde-tracker/id6443472258)

Stay ahead of astrological disruptions with this tool that tracks Mercury retrograde dates. Receive advance notifications, access personalized horoscopes, and use the note-taking feature to reflect on each period. Plan your life and avoid potential issues caused by planetary shifts.

**Highlights:** Mercury retrograde event dates, Personalized horoscopes, Advance event notifications, Note-taking for retrograde periods, Astrology forecasts

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $1.99 | per month |
| Pro Annual | $9.99 | per year |
| Pro Lifetime | $14.99 | one-time |


## Frequently asked questions

### Is Gas Giants free?

Gas Giants is free to download, with no in-app purchases.

### Is Mercury Retrograde Tracker free?

Mercury Retrograde Tracker is free to download, with in-app purchases available.

### Which has better reviews, Gas Giants or Mercury Retrograde Tracker?

Mercury Retrograde Tracker is rated higher. Gas Giants averages 4.2 out of 5 from 25 ratings, while Mercury Retrograde Tracker averages 4.2 from 55 ratings.

### Do Gas Giants or Mercury Retrograde Tracker have ads?

Neither Gas Giants nor Mercury Retrograde Tracker shows ads.

### Which is updated more often, Gas Giants or Mercury Retrograde Tracker?

Gas Giants ships an update every 6 months, and Mercury Retrograde Tracker every 3 weeks. Most recently, Gas Giants was updated on November 1, 2026 and Mercury Retrograde Tracker on November 3, 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.*