Comparison

Star Walk 2 Pro vs Radiacode

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

Head to head
About

Star Walk 2 Pro

Explore the night sky with this augmented reality stargazing app. Point your device to identify thousands of stars, planets, constellations, and celestial events in real-time. Discover astronomical news and plan your observations with a comprehensive sky map.

Highlights
  • Real-time sky map
  • Augmented reality mode
  • 3D constellation models
  • Time machine feature
  • Deep sky object identification
  • Night mode for comfortable viewing
  • Visible Tonight section for events
Features
Currently charting
Read full description

Star Walk 2 is an exquisite stargazing app enabling you to explore the night sky through the screen of your device. Make an effortless journey through thousands of stars, comets, constellations, and other celestial bodies. All you have to do is point your device to the sky! ⁕ BEST OF 2014: The next generation of the best-selling Star Walk, winner of Apple Design Award, used by over 10 million people ⁕ The app taps your device’s sensors and the GPS to determine the exact position of stars, planets, constellations, comets, ISS, satellites, meteor showers, etc., in the night sky. “She’s a beauty.”- The Next Web “Star Walk 2 is a terrific introduction to astronomy for young and old. It’s also handy for serious stargazers for observing planning.” - TUAW “Star Walk 2 is visually stunning.” - PCmag “This is a very beautiful and unusual application that turns your phone into a real planetarium.” - Free apps for me “For those who enjoy the original app, Star Walk 2 is worth the upgrade — the interface is gorgeous. Anyone with even a passing interest in astronomy should grab Star Walk 2.” - iLounge “It is worth every penny.” - PadGadget Star Walk 2 in travel & tourism industry: ‘Rapa Nui Stargazing’ based on Easter Island uses Star Walk 2 for sky observations during its astronomical tours. ‘Nakai Resorts Group’ in the Maldives uses Star Walk 2 during astronomy meetings for its guests. Main features: ◆ Map of the sky in real time ◆ Stunning 3D models of constellations and other sky objects ◆ “Time machine” ◆ Deep sky objects ◆ Info about celestial bodies and sky events ◆ The sky at different wavelengths ◆ Augmented reality mode ◆ Night mode ◆ "What's new" section with the latest astronomical news ◆ "Visible Tonight" section ► Star Walk 2 shows the real-time map of the sky on your screen in whatever direction you are pointing the device. As you hold your phone up and point it towards the sky, the star map follows your motions using the built-in gyroscope to match the map on your screen to the stars seen from your location. ► What's up in the sky tonight? Open the "Visible Tonight" section of Star Walk 2 and quickly find out all upcoming astronomical events and celestial objects visible for your location. ► Be aware of the latest news from the world of space and astronomy. The app's "What's new" section will tell you about the most outstanding celestial events in time. ► Touching a clock-face icon at the upper-right corner of the screen allows you to select any date and time and watch the sky of different periods. ► Get a deeper understanding of the constellation`s scale and place in the night sky. Enjoy observing wonderful 3D models of constellations, turn them upside down, read their stories. ► Find and study deep sky objects such as meteor showers, planetary nebulae, star clusters, etc. ► The night-mode will make your stargazing at night time more comfortable. Star Walk 2 is the sequel to the original Star Walk, which is one of the most popular apps for stargazing. New in Star Walk 2: -Incredible 3D models of celestial bodies -All-new stunning design -New interface in vibrant colours for retina displays -Atmospheric visual and sound effects, stirring soundtrack -Exclusive handcrafted artwork for constellations The app contains In-App Purchases. If you enjoy exploring the stars, then our app is a must-have for your arsenal. Start your best stargazing experience right now!

About

Radiacode

This application enhances a radiation monitoring device, offering real-time data analysis, interactive dashboards, and advanced search functions. It visualizes isotopes, detects food contamination, and maps radiation levels geographically, providing detailed insights into radiation environments.

Highlights
  • Interactive real-time dashboard
  • Advanced ionizing radiation search
  • Alarms for radiation limits
  • Isotope visualization and spectrometry
  • Food contamination detection (Cesium-137)
  • Radiological mapping on Google Maps
Features
Read full description

Discover the full potential of Radiacode, a device designed for smart, flexible, and efficient operations, which transforms into an even more powerful tool when paired with Radiacode application, thereby enhancing device capabilities in radiation monitoring and data analysis. INTERACTIVE DASHBOARD Experience a user-friendly, real-time dashboard that displays comprehensive gamma energy and source analysis metrics, offering seamless navigation across all tools. SEARCHER The feature introduces an advanced ionizing radiation search function, equipped with an optimal averaging algorithm that enhances data processing and significantly improves responsiveness, providing users with precise and efficient real-time monitoring of radiation levels across diverse environments. SIGNALISATION The feature enhances the application with critical safety tools, activating alarms when detected radiation surpasses preset limits and providing users the flexibility to deactivate these alerts, ensuring a comprehensive approach to radiation monitoring and response. GAMMA SPECTROMETRY AND ISOTOPE VISUALIZATION Radiacode uniquely visualizes isotopes by interpreting the radiation spectrum, revealing varied gamma energy levels and enabling precise discrimination between different radiation elements for an engaging analytical experience. Visualize isotopes such as Radium-226 and Cesium-137 with ease, revealing varied gamma energy levels for a thorough understanding of different radiation elements, using technology previously exclusive to expensive laboratory equipment, now available in a portable, cost-effective format.

 SPECTROGRAM The spectrogram feature enhances data visualization and analysis in radiation spectrometry. It allows users to view the distribution of gamma radiation intensity across various energy levels in a visual format, making it easier to analyze and interpret radiation data. This function provides a detailed visual representation of the radiation spectrum, improving the ability to monitor and understand variations in radiation levels over time.
 DOSE MONITOR
 Monitor your radiation exposure throughout the day with a clear and intuitive overview of your accumulated dose. Track how your exposure evolves over time, identify spikes, and compare your data against reference safety levels for better awareness and control.
 The system automatically subtracts background radiation for improved accuracy and synchronizes environmental data via Radiaverse based on your location. Advanced algorithms ensure continuity by estimating exposure even when the device is not actively connected.
 Customize your monitoring experience by adjusting reference levels, selecting time ranges, and switching between total dose and above-background views. A detailed history chart allows you to manage sessions and refine your personal exposure data. FOOD CONTAMINATION Radiacode offers a specialized mode for detecting Cesium-137 in food products and liquid samples, using technology similar to laboratory analysis in a compact, easy-to-use format. Check seafood, berries, mushrooms, dairy, and meat for traces of Cs-137, compare results with safety limits, and ensure greater confidence in everyday food safety. With optional accessories such as a Marinelli beaker, Radiacode makes advanced contamination checks simple and accessible. RADIOLOGICAL MAPPING Explore the captivating feature of recording radiation measurements directly on Google Maps, where tracks are vividly plotted with color-coded points, each representing the exposure rate at specific locations. 

EVENTS The Events section allows alarms to function and register as events when set radiation levels are exceeded. It records the duration of the event and displays the limit level values for the period of the event. This section also includes the display of various system events for comprehensive monitoring. Radiacode is an excellent tool for scientific experimentation, research and safety.

Screenshots

Star Walk 2 Pro4 screens
Radiacode4 screens

Verdict

The call

The clearest difference is price: Radiacode at Free against Star Walk 2 Pro's $2.99. Radiacode also leads on in-app purchases (none vs 8). Star Walk 2 Pro's advantage is rating (4.7 vs 4.2) and ratings volume (67K vs 93). On update cadence, ads and device support 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

Radiacode is free to download; Star Walk 2 Pro costs $2.99 up front. Star Walk 2 Pro sells 8 one-off in-app purchases. Radiacode asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Star Walk 2 Pro holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Star Walk 2 Pro has 67K ratings behind it against 93, so its average is the more settled of the two. Written reviews point the same way: 72% of Star Walk 2 Pro's written reviews are positive against 63% of Radiacode's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 26, 2026 and September 8, 2026 respectively.

Scorecard8 real differences · 3 level
Star Walk 2 Pro versus Radiacode: the parameters behind the verdict, then further details
ParameterStar Walk 2 ProRadiacode
Price$2.99Free — better
Rating4.7 (67K ratings) — better4.2 (93 ratings)
Positive reviews72.3% of reviews — better63.0% of reviews
Number of ratings67K — better93
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#44 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS15.0 — better17.0
Further details — not scored
Size357 MB49 MB
Age rating4+4+
DeveloperVito Technology Inc.Radiacode Ltd

Customer experience

Star Walk 2 Pro

All ratings67,054 ratings
Positive93.7%
Neutral2.7%
Negative3.6%
Written reviews567 reviews
Positive72.3%
Neutral6.3%
Negative21.3%

Radiacode

All ratings85 ratings
Positive81.2%
Neutral8.2%
Negative10.6%
Written reviews54 reviews
Positive63.0%
Neutral16.7%
Negative20.4%

User reviews

Star Walk 2 Pro

From 67K App Store ratings

What we love

  • 🚀 Accurate sky mapping
  • 🌟 Visually stunning graphics
  • 🔍 Detailed information on celestial objects
  • 🧑‍🎓 Educational and informative
  • 🔔 Helpful notifications about sky events

Room to improve

  • 🔔 Too many notifications
  • 💰 Expensive in-app purchases required for full features
  • 🐛 Occasional glitches and bugs
  • 🧭 Difficulty calibrating and aligning the app with the sky
  • 🌍 Limited support for Southern Hemisphere users

Radiacode

From 93 App Store ratings

What we love

  • 👍 Great app and device
  • 👍 Easy to use and intuitive
  • 🚀 Constantly being developed
  • 👍 Fun to explore radiation
  • 👍 Great value for hobbyist

Room to improve

  • 🐛 App keeps crashing
  • 🐛 App crashes immediately
  • 🐛 App won't open
  • 🐛 App crashes constantly
  • 🐛 Features flat out don't work

Bugs and requests

Star Walk 2 Pro

Reported bugs

3 issues
  • App crashing on launch for some users
  • Incorrect celestial object positioning in certain locations
  • Notifications not working as expected

Requested features

5 requests
  • Customizable notification settings
  • More detailed information on moons and satellites
  • Option to disable animated constellation overlays
  • Improved time/date controls for planning future sky viewing
  • Support for equatorial mounts and telescopes

Radiacode

Reported bugs

20 issues
  • App keeps crashing
  • App crashes immediately upon opening
  • App won't open on iPhone 15 Pro
  • App crashes constantly
  • Features don't work
Show 15 more
  • Map tracks deleted after short time
  • App unstable and shuts down immediately
  • App locks up, especially with track function
  • Bluetooth disconnects periodically
  • App crashes every so often
  • Geotracking stops recording in background
  • Screen doesn't lock to avoid background mode
  • Measurement units cannot be changed in app
  • Settings have to be changed on device
  • Minimal integration with Apple Watch
  • Spectra list doesn't populate for calibration
  • Map function crashes a lot
  • App crashes when running map
  • Bluetooth connectivity issues
  • Firmware management issues

Requested features

31 requests
  • Scale data on map view
  • Plot data along exponential curve
  • See nuances in data less binary
  • Clicks play through headphones
  • Tone frequency proportional to energy
Show 26 more
  • Change units to CPM
  • Russian language support
  • Option to use Bluetooth headphones
  • CPM option when app is minimized
  • Keep device awake when using app
  • Better pinch to zoom in spectrum view
  • Option to shut down device when app disconnects
  • See all tracks at once
  • Match device readout units in app (REM/CPM)
  • Map function works with Apple CarPlay
  • Change temperature to Fahrenheit
  • Show photon energies as detected
  • Include altitude when recording tracks
  • Dedicated Apple Watch app with clock face integration
  • Widget for the app
  • Calibrate device offset
  • Filter in spectrum view
  • Spectrograph, events, and Inspector features
  • Charge percentage display
  • Profile feature
  • Spectrogram feature
  • Events feature
  • Map running, but log GPS when alert triggered
  • Export spectra from spectrum library
  • Overlay background spectrum during analysis
  • Select spectrum from library to view in spectrum viewer

In-app purchases

8 purchases

Star Walk 2 Pro

One-time8
  • Constellations of AvengersFree
  • Satellite Finder in Sky Above$0.99
  • Constellations 3D on Sky Map$0.99
Show 5 more
  • Deep Space Objects Explorer$0.99
  • Explore Solar System Objects$0.99
  • Planets of the Solar System$0.99
  • Space Explorer: Kids Cartoons$0.99
  • Star Tracker AR: Full Version$2.99
None

Radiacode

No in-app purchases

Questions

Is Star Walk 2 Pro free?
Star Walk 2 Pro costs $2.99, and also offers in-app purchases.
Is Radiacode free?
Radiacode is free to download, with no in-app purchases.
Which has better reviews, Star Walk 2 Pro or Radiacode?
Star Walk 2 Pro is rated higher. Star Walk 2 Pro averages 4.7 out of 5 from 67K ratings, while Radiacode averages 4.2 from 93 ratings.
Do Star Walk 2 Pro or Radiacode have ads?
Neither Star Walk 2 Pro nor Radiacode shows ads.
Which is updated more often, Star Walk 2 Pro or Radiacode?
Star Walk 2 Pro ships an update every 2 months, and Radiacode every 2 months. Most recently, Star Walk 2 Pro was updated on September 26, 2026 and Radiacode on September 8, 2026.

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