SpectrumView vs Radiacode
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SpectrumView
This app provides real-time audio analysis with a dynamic spectrogram and spectrum analyzer. Visualize audible and inaudible frequencies, measure tones, get feedback on speech, identify sounds, and calibrate instruments. Access recordings and snapshots easily.
- Real-time spectrogram and spectrum analyzer
- Configurable sample rate and frequency resolution
- Record, pause, and playback audio files
- Generate snapshots of spectrum data
- Web file transfer
- Tap data cursor for precise frequency and level
- Musical notes or frequency display on tap
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SPECTRUMVIEW Visualise, in real time, the frequencies that you can hear around you and even those you cannot with SpectrumView, your dynamic audio companion for iPhone, iPad, and iPod Touch. SpectrumView provides a high-quality, real-time spectrogram and spectrum analyser display, with a configurable sample rate and frequency resolution. You can use this application to measure the highest tones you can sing, obtain visual feedback of the frequencies in your speech, identify an annoying sound, calibrate musical instruments and all sorts of acoustic analysis. Here's what it can do for you: · Refresh Spectrogram. Allows users to refresh the spectrogram so that it clears the spectrogram that had already been displayed. · Change min and max scale. Allows users to set their own minimum and maximum scale value on the spectrogram and spectrum analyser view, in both linear and log scale. · Set Recording filename. Recording filenames are editable and the suffix can be set to have an incremental value or date/time. · Generate snapshot of the spectrum data from playback and live recordings. [IAP] · Access recordings and snapshots using the "Files" app. All the data can be easily accessible using the "Files" app that is available from iOS 11. · Web File Transfer. Allows you to access your files from another device using a web browser. [IAP] · Logarithmic scale. Allows you to set either linear or logarithmic frequency scales in the Spectrogram and Spectrum Analyser views. [IAP] · Peak hold. Allows you to freeze and hold the peaks of the frequency envelope (three holds in three distinct colours) in Spectrum Analyser mode. [IAP] · Save location. Never forget where a clip was recorded – uses the devices location services. · Auto lock disabled. During playback and recordings auto lock is disabled to prevent the device from automatically locking (if enabled), for uninterrupted recording/playback · Multiple selectable sample rates from 8,000 Hz to 48,000 Hz · High-frequency resolution with configurable signal analysis window lengths or Fast Fourier Transform (FFT) orders. · Sound intensity represented using a colour spectrum scale from -96 dBFS to 0 dBFS. · Frequency Pinch-to-Zoom. Allows you to zoom into the frequency space to look at a specific tone or frequency. [IAP] · Recording and Playback of Audio Files. Provides a fully functional audio recorder that allows you to record, pause and play back files in high-quality, uncompressed, wave format. · Tap Data Cursor. Allows taps on any part of the Spectrogram or Spectrum Analyser display to obtain the exact frequency in Hertz (Hz) and level in decibels (dB) at that point. · Musical Notes or Frequency Display on Tap. Selectable frequency or musical pitch notation to obtain the cent-accurate musical note e.g. A4 (22), when the display is tapped. · Live Spectrogram and Spectrum Analyser Views of Recorded Files. Files recorded can be played back and the Spectrogram and Spectrum Analyser modes can be used to review the audio. · Sharing Recorded Files by Email or iTunes File-sharing. · High Quality Screenshots. · *Improved* Soundcloud support. Audio files can be uploaded to or downloaded from Soundcloud as well as being able to post audio to Facebook. [IAP] · Playback from iTunes library. Files can now be analysed directly form the iTunes library. · *NEW* Import audio from videos in your device library. · Fullscreen mode. Hide the menu at the bottom of the screen to get even more of the screen dedicated to frequency analysis. · Selectable spectrogram colour scales. You can now select one of 7 colour scales for your spectrogram. · Selectable window functions. You can now see the window function options provided. · Apply gain. A maximum of 24dB gain can be applied to make ‘hard to see’ details easier to view. · Open In. Audio files can be directly opened in SpectrumView. View files sent by email directly in SpectrumView.
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.
- 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
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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
Verdict
The clearest difference is rating: Radiacode at 4.2 against SpectrumView's 3.1. Radiacode also leads on in-app purchases (none vs 7) and update cadence (every 2 months vs every 10 months). SpectrumView's advantage is iOS requirement (9.0 vs 17.0). On price, review sentiment, ratings volume and ads 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
Both are free to download. SpectrumView sells 7 one-off in-app purchases. Radiacode asks for nothing beyond the download.
Radiacode holds the better App Store score, 4.2 against 3.1. Both are backed by a comparable volume of ratings — 74 and 93 respectively. Written reviews split almost evenly too, at 63% and 63% positive.
SpectrumView ships an update every 10 months, Radiacode every 2 months. The most recent releases landed on September 21, 2026 and September 8, 2026 respectively.
| Parameter | SpectrumView | Radiacode |
|---|---|---|
| Price | Free | Free |
| Rating | 3.1 (74 ratings) | 4.2 (93 ratings) — better |
| Positive reviews | 63.0% of reviews | 63.0% of reviews |
| Number of ratings | 74 | 93 — better |
| Update frequency | Every 10 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 17 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | Oxford Wave Research Ltd. | Radiacode Ltd |
Customer experience
SpectrumView
Radiacode
User reviews
SpectrumView
From 74 App Store ratingsWhat we love
- 👍 Accurate and reliable spectrogram visualization
- 🎯 Highly configurable FFT and sampling settings
- 🎨 Beautiful and intuitive user interface
- 📊 Excellent for analyzing speech, music, and animal sounds
- ⚙️ Useful for professional audio calibration and research
Room to improve
- 💰 Aggressive in-app purchase model for basic features
- 🔐 Unexplained location permission requests
- 📉 Linear frequency scale wastes screen space
- ⏱️ Slow app startup times
- 🎯 Limited frequency range (8kHz cap in recent versions)
Radiacode
From 93 App Store ratingsWhat 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
SpectrumView
Reported bugs
11 issues- App crashes on startup after updates
- Crashes when attempting to zoom on spectrograms
- Crashes when playing files from iTunes library
- Microphone hijacking error messages
- Pinch-to-zoom and pan features not functioning properly
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- App freezes when backgrounded
- Spectrogram resets when rotating device orientation
- Audio plays through speaker instead of headphones
- Blank screen with no display output
- Incompatibility with older iOS versions
- Requires in-app purchase prompts for all features after iCloud restore
Requested features
13 requests- Logarithmic frequency scale for audio analysis
- Adjustable time scale/window for spectrograms
- Ability to analyze audio from music library/iTunes
- Longer-term averaging for spectrum analyzer
- A-weighting frequency selection
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- Batch delete option for recordings
- Real-time audio input from playing songs
- Metadata storage (timestamp, location) in WAV files
- SPL meter functionality
- 3D display option
- Adjustable color range for spectrogram
- Auto-readout of highest amplitude frequency
- Higher frequency range support (above 20kHz)
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
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- 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
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- 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
SpectrumView
- Enable peak hold$0.99
- Access iTunes and SoundCould$0.99
- Generate data snapshot$0.99
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- Enable Log Scale$1.99
- Disable recording length limit$1.99
- Enable pinch to zoom$1.99
- Enable Web File Transfer$1.99
Radiacode
No in-app purchases









