Comparison

Satellite Tracker ISS Live Map vs Spectrum SDR (RTL

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Satellite Tracker ISS Live Map

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
Read full description

Discover the cosmos with our Satellite Tracker app, offering real-time tracking of low-earth-orbit satellites and the International Space Station (ISS). Perfect for astronomers, students, and anyone fascinated by space, this app brings satellite motion and sky visibility to your fingertips. Key Features: - Live Satellite & ISS Tracking: Track thousands of low-earth-orbit satellites and the ISS in real time, with accurate orbital paths and pass predictions. - Satellite Visibility & Pass Forecasts: View detailed visibility schedules to know when satellites are brightest and observable in your location. - Educational Insights: Learn about satellite missions, orbits, and space technology using publicly available data. - User-Friendly Interface: Navigate easily and follow satellites with a clean, intuitive design. - Custom Alerts: Set notifications for upcoming satellite passes, including the ISS and supported satellite constellations. Why Our App? - Comprehensive and Up-to-Date: Access recent public orbital data for a wide range of satellites and space objects. - For Everyone: Whether you're a space enthusiast or a casual stargazer, our app is designed for all users. Download our app now and start tracking satellites directly from your device. Embrace the beauty of space exploration and stay informed about the satellites orbiting our planet. *Disclaimer: This app is not affiliated with neither SpaceX nor NASA nor Starlink nor ISS nor any satellite operator/space related . All satellite data is sourced from public, third-party databases, we do not own any of these data. Notice - This app are free-to-install, but has some premium features that need purchase/subscribe to use. Non-subscribed users can use each Premium feature for a limited number of times per day. - Subscriptions automatically renew unless cancelled 24 hours before the end of the period. - Manage your subscription and turn off auto-renewal in your account settings. - Any unused portion of a free trial will be forfeited if you subscribe. Term of use: https://moniqtap.com/terms-of-use/ Privacy Policy: https://moniqtap.com/privacy-policy/

About

Spectrum SDR (RTL

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
Read full description

This application is about having a bit of fun with those amazing little RTL-SDR dongles, whilst listening to AM/FM/SSB/CW radio signals. It's nice and easy to use so why not give it a try? - Covers the full frequency range of your RTL-SDR dongle. - AM and FM, wide and narrow, SSB, CW. - FFT and Waterfall displays. - Sample rates 240000 Hz to 2160000 Hz. - Bias tee control. - 75 presets over 5 pages. - Gain controls. - Squelch. - Flexible display options, hide things you don't need to see. - Built-in help. The application needs to be connected to an instance of rtl_tcp running on a remote computer, most likely over WiFi. You will need a good network connection for this to work reliably when using the higher sample rates. It can be installed on an iPhone, iPad or Apple Silicon Mac. We hope you enjoy using this application.

Screenshots

Satellite Tracker ISS Live Map4 screens
Spectrum SDR (RTL3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Satellite Tracker ISS Live Map versus Spectrum SDR (RTL: the parameters behind the verdict, then further details
ParameterSatellite Tracker ISS Live MapSpectrum SDR (RTL
PriceFreeFree
Rating4.7 (477 ratings) — better4.5 (2 ratings)
Positive reviews52.4% of reviews100.0% of reviews — better
Number of ratings477 — better2
Update frequencyMonthlyEvery 11 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhoneiPhone, iPad, Mac — better
Requires iOS17.6 — better26.0
Further details — not scored
Size91 MB7 MB
Age rating4+4+
DeveloperPhong PhamJames Mainwaring

Customer experience

Satellite Tracker ISS Live Map

All ratings388 ratings
Positive92.8%
Neutral4.4%
Negative2.8%
Written reviews21 reviews
Positive52.4%
Neutral4.8%
Negative42.9%

Spectrum SDR (RTL

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

9 purchases

Satellite Tracker ISS Live Map

Subscriptions7
  • Premium Weekly3 Days trial$6.997 Days
  • Premium Weekly3 Days trial$7.997 Days
  • Premium Monthly$12.991 Month
Show 4 more
  • Premium Monthly$14.991 Month
  • Premium Yearly$39.991 Year
  • Premium Yearly$49.991 Year
  • Premium Yearly$59.991 Year
One-time2
  • Premium Lifetime$49.99
  • Premium Lifetime$59.99
1 purchases

Spectrum SDR (RTL

One-time1
  • Full Version$2.99

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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