# Graycode vs Satellite Tracker Pro

The clearest difference is price: Satellite Tracker Pro at Free against Graycode's $2.99. Satellite Tracker Pro also leads on rating (4.3 vs 3.0) and ratings volume (65 vs 2). Graycode's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

Satellite Tracker Pro is free to download; Graycode costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Satellite Tracker Pro holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: Satellite Tracker Pro has 65 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 67% of Graycode's written reviews are positive against 72% of Satellite Tracker Pro's.

Graycode ships an update every 10 months, Satellite Tracker Pro every 11 months. The most recent releases landed on September 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Graycode | Satellite Tracker Pro |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/graycode/id548428653/reviews) | **[4.3 (65 ratings)](https://appshunter.io/ios/app/satellite-tracker-pro/id1518484999/reviews)** |
| Number of ratings | 2 | **65** |
| Positive reviews | 66.7% of reviews | **72.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 11 months |
| Monetization | Paid | **Free** |
| Size | 2 MB | 58 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Duo Pisceses, Inc.](https://appshunter.io/developer/850707063) | [Kornienko Vyacheslav](https://appshunter.io/developer/1518484998) |

## What reviewers say

### Graycode

[App page](https://appshunter.io/ios/app/graycode/id548428653)

This utility converts numbers between decimal, hexadecimal, binary, and Gray code formats. Changes to one value automatically update the others, making it a convenient tool for engineers. It also features an animated demonstration of the Tower of Hanoi puzzle.

**Highlights:** Decimal, hex, binary, Gray code conversion, Real-time updates, Handy calculator for engineers, Animated Tower of Hanoi solution, Supports iPhone, iPad, iPod

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

**In-app purchases:** none


### Satellite Tracker Pro

[App page](https://appshunter.io/ios/app/satellite-tracker-pro/id1518484999)

Track thousands of satellites in real-time with a 3D Earth model and augmented reality sky gazing. Plan your stargazing sessions with pass predictions and receive personalized notifications for your favorite satellites.

**Highlights:** Real-time 3D Earth model with satellite orbits, Augmented reality (AR) sky gazing for satellite location, Next passes feature for stargazing planning, Personalized notifications for satellite passes, Interactive satellite radar with detailed information, In-depth satellite data

**In-app purchases:** none

**What reviewers like**

- 👍 Great and simple UI
- 💡 No in-app purchases
- 💡 Awesome AR feature
- 💡 Surprisingly no adds
- 💡 Free app

**What reviewers complain about**

- 🐛 Buggy on iOS26
- 🐛 Crashes often
- 🐛 Sometimes off by up to 10°
- 🐛 Globe has problems near poles
- 🐛 Globe movement issues

**Reported bugs**

- AR mode camera only turned on first time
- Globe movement issues
- Map is jittery and bogged down with data
- Cannot make Earth move smoothly
- Cannot see satellite itself

**Requested features**

- Filter to see selected satellites
- Preset filters for AR function
- Section for repeater info (on board Yes/No, PL tone, uplink, downlink)
- Add GEO satellites
- Color code different satellites


## Frequently asked questions

### Is Graycode free?

Graycode costs $2.99, with no in-app purchases.

### Is Satellite Tracker Pro free?

Satellite Tracker Pro is free to download, with no in-app purchases.

### Which has better reviews, Graycode or Satellite Tracker Pro?

Satellite Tracker Pro is rated higher. Graycode averages 3.0 out of 5 from 2 ratings, while Satellite Tracker Pro averages 4.3 from 65 ratings.

### Do Graycode or Satellite Tracker Pro have ads?

Neither Graycode nor Satellite Tracker Pro shows ads.

### Which is updated more often, Graycode or Satellite Tracker Pro?

Graycode ships an update every 10 months, and Satellite Tracker Pro every 11 months. Most recently, Graycode was updated on September 25, 2026 and Satellite Tracker Pro on October 7, 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.*