# Satellite Tracker ISS Live Map vs Spectrum SDR (RTL

Satellite Tracker ISS Live Map and Spectrum SDR (RTL both sit at 4.7 stars, but that hides the real split: 100% of Spectrum SDR (RTL's written reviews are positive against 52% of Satellite Tracker ISS Live Map's. Spectrum SDR (RTL also leads on ads (none vs shown) and monetization model (free vs free with in-app purchases). Satellite Tracker ISS Live Map's advantage is ratings volume (477 vs 2) and iOS requirement (17.6 vs 26.0). On price, rating and in-app purchases there is nothing between them.

Both are free to download. Satellite Tracker ISS Live Map sells 9 in-app purchases, starting at $6.99 per 7 days and Spectrum SDR (RTL sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Satellite Tracker ISS Live Map holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Satellite Tracker ISS Live Map has 477 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 52% of Satellite Tracker ISS Live Map's written reviews are positive against 100% of Spectrum SDR (RTL's, so the app with the better star average is not the one people write more warmly about.

Satellite Tracker ISS Live Map ships an update monthly, Spectrum SDR (RTL every 11 days. The most recent releases landed on November 12, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Satellite Tracker ISS Live Map | Spectrum SDR (RTL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (477 ratings)](https://appshunter.io/ios/app/satellite-tracker-iss-live-map/id6746504191/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/spectrum-sdr-rtl-sdr/id6764391865/reviews) |
| Number of ratings | **477** | 2 |
| Positive reviews | 52.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 11 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 91 MB | 7 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Phong Pham](https://appshunter.io/developer/1731047500) | [James Mainwaring](https://appshunter.io/developer/1895761181) |

## What reviewers say

### Satellite Tracker ISS Live Map

[App page](https://appshunter.io/ios/app/satellite-tracker-iss-live-map/id6746504191)

Track satellites and the International Space Station in real-time with accurate orbital paths and visibility forecasts. Learn about space missions and receive custom alerts for upcoming passes. Designed for space enthusiasts and stargazers of all levels.

**Highlights:** Live Satellite & ISS Tracking, Satellite Visibility & Pass Forecasts, Educational Insights, User-Friendly Interface, Custom Alerts

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $6.99 | per 7 days |
| Premium Weekly | $7.99 | per 7 days |
| Premium Monthly | $12.99 | per month |
| Premium Monthly | $14.99 | per month |
| Premium Yearly | $39.99 | per year |
| Premium Yearly | $49.99 | per year |
| Premium Yearly | $59.99 | per year |
| Premium Lifetime | $49.99 | one-time |
| Premium Lifetime | $59.99 | one-time |


### Spectrum SDR (RTL

[App page](https://appshunter.io/ios/app/spectrum-sdr-rtl-sdr/id6764391865)

Explore radio signals with your RTL-SDR dongle. Listen to AM/FM/SSB/CW, view FFT and waterfall displays, and customize your experience. Requires a remote rtl_tcp instance over WiFi.

**Highlights:** Full frequency range support, AM, FM, SSB, CW reception, FFT and Waterfall displays, Adjustable sample rates, Bias tee and gain controls, Squelch functionality, Customizable display options

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $2.99 | one-time |


## Frequently asked questions

### Is Satellite Tracker ISS Live Map free?

Satellite Tracker ISS Live Map is free to download, with in-app purchases available.

### Is Spectrum SDR (RTL free?

Spectrum SDR (RTL is free to download, with in-app purchases available.

### Which has better reviews, Satellite Tracker ISS Live Map or Spectrum SDR (RTL?

Satellite Tracker ISS Live Map is rated higher. Satellite Tracker ISS Live Map averages 4.7 out of 5 from 477 ratings, while Spectrum SDR (RTL averages 4.5 from 2 ratings.

### Do Satellite Tracker ISS Live Map or Spectrum SDR (RTL have ads?

Satellite Tracker ISS Live Map shows ads; Spectrum SDR (RTL does not.

### Which is updated more often, Satellite Tracker ISS Live Map or Spectrum SDR (RTL?

Satellite Tracker ISS Live Map ships an update monthly, and Spectrum SDR (RTL every 11 days. Most recently, Satellite Tracker ISS Live Map was updated on November 12, 2026 and Spectrum SDR (RTL on October 31, 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.*