Comparison

Frequency Analyzer vs Smell.Board Hub

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

Head to head
About

Frequency Analyzer

Transform your device into a professional audio analysis tool with real-time FFT, SPL monitoring, and advanced visualization. Record, analyze, and export high-quality audio and video data for various acoustic applications.

Highlights
  • Real-time FFT analysis
  • Calibrated SPL measurement
  • High-resolution spectrum analyzer
  • Real-time waveform display
  • 32-bit float audio recording
  • Synchronized video recording
  • Export WAV, CSV, images, and videos
Features
Read full description

Transform your device into a professional-grade audio analysis suite with industry-leading 32-bit float processing, precision calibration tools, and comprehensive visualization capabilities. PROFESSIONAL ACOUSTIC MEASUREMENT • Real-time FFT analysis with configurable window sizes up to 4096 points • Reference SPL measurement with calibrated sound pressure level monitoring • Professional microphone correction with frequency-specific calibration curves • Reference tone calibration for precise frequency measurements • Configurable time averaging (0-1000ms) for stable, accurate readings • Industry-standard weighting filters: dBA, dBC, dBZ, and linear magnitude • Multiple window functions: Hanning, Hamming, Blackman ADVANCED VISUALIZATION MODES • High-resolution spectrum analyzer with peak detection • Real-time waveform display • Professional spectrogram • Octave band analysis • Amplitude tracking over time • Total level monitoring with min/max/average statistics POWERFUL RECORDING & ANALYSIS • High-quality 32-bit float audio recording and playback • Synchronized video recording with audio analysis overlay • Event tracking system with timestamped notes • Playback synchronization with all recorded events and measurements • Location mapping for environmental noise surveys • Export capabilities: WAV audio, CSV data, high-resolution images and videos PRECISION DECIBEL MEASUREMENT • Calibrated SPL measurements with reference level adjustment • Real-time dB monitoring with peak hold functionality • Statistical analysis: Leq, Lmax • Configurable time averaging (0-1000ms) • Frequency-weighted noise exposure calculations • Exposure calculator for NIOSH and OSHA IDEAL FOR PROFESSIONALS • Acousticians and audio engineers • Environmental noise consultants • Musicians and sound designers • Room acoustics optimization • Industrial noise monitoring • Educational and research applications • Live sound reinforcement • Building acoustics assessment Download now and unlock the full spectrum of acoustic measurement capabilities. DISCLAIMER This is a consumer application designed for general audio analysis and educational purposes. It is not a certified measurement instrument and should not be used where legally compliant or certified measurements are required. For professional acoustic assessments requiring traceable calibration or regulatory compliance, we recommend using an external calibrated measurement microphone with certified sound level meters. EULA: https://frequency-analyzer.com/terms-and-conditions/

About

Smell.Board Hub

Features
Read full description

Today, machines can see, hear, feel, and even learn—but what about smell? Smell Board Hub introduces the missing sense to digital systems. Powered by advanced nanomaterial-based sensing technology and AI-driven analysis, the app enables real-time smell detection, recognition, and interpretation. Built as part of the Smell Inspector Developer Kit, Smell Board Hub provides a powerful platform to monitor, annotate, and analyze smell data from smart sensing devices. It is ideal for industrial safety, research, environmental monitoring, and smart environment applications. What is Smell Board Hub? Smell Board Hub is an AI-powered application designed to: Capture real-time smell data from connected devices Analyze and classify smells using machine learning Convert raw sensor data into meaningful insights Enable annotation and continuous improvement of detection accuracy It acts as a bridge between hardware sensors and intelligent software systems, making smell detection practical and scalable. Real-Time Monitoring and Insights Live smell detection results Timestamped activity logs Model version tracking Monitor system performance and make informed decisions using real-time data. Smell Annotation and Event Management Label detected smells with custom tags Convert detections into structured events Group multiple detections into a single event Define time windows for precise observations This system improves data quality and strengthens machine learning models. Manual Event Recording Record smell or substance details manually Add start and end times Include notes and observations Maintain accurate datasets for validation Useful for real-world scenarios where manual input is required. Notifications and Alerts Instant alerts for detected smells Device-specific notifications Filter notifications by status View detailed prediction data Stay informed and respond quickly to environmental changes. Feedback and Model Improvement Mark predictions as correct, incorrect, or uncertain Provide contextual feedback Improve AI model accuracy over time User feedback directly enhances system intelligence. Sensor Data Integration Smell Board Hub integrates with advanced sensing hardware, including: 4 Smell iX16 detector chips Temperature sensors Humidity sensors View both real-time and historical environmental data for deeper analysis. Smell Inspector Device Integration The app connects seamlessly with the Smell Inspector device, a developer kit designed for smell detection applications. Key capabilities include: Multiple sensor chip integration Compatibility with smartphones, tablets, and PCs Suitable for testing, research, and prototyping Supports diverse smell detection use cases Key Benefits AI-powered smell detection and analysis Real-time monitoring and alert system Advanced annotation and event tracking Seamless hardware integration Clean and intuitive user interface Reliable and secure platform Security and Access Secure login system Password recovery with verification Email-based authentication Safe and reliable data handling About SmartNanotubes Technologies SmartNanotubes Technologies is focused on enabling digital smell recognition. The company aims to make smell detection fast, accessible, and practical for businesses developing gas and odor sensing solutions. Learn more at: http://smart-nanotubes.com

Screenshots

Frequency Analyzer4 screens
Smell.Board Hub4 screens

Verdict

The call

The clearest difference is in-app purchases: Smell.Board Hub at none against Frequency Analyzer's 10. Smell.Board Hub also leads on iOS requirement (15.6 vs 17.2). Frequency Analyzer's advantage is update cadence (weekly vs every 5 weeks). On price, 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

Both are free to download. Frequency Analyzer sells 10 in-app purchases, starting at $2.99 per 7 days. Smell.Board Hub asks for nothing beyond the download.

UpkeepUpdate frequency

Frequency Analyzer ships an update weekly, Smell.Board Hub every 5 weeks. Both last shipped on November 8, 2026.

Scorecard3 real differences · 7 level
Frequency Analyzer versus Smell.Board Hub: the parameters behind the verdict, then further details
ParameterFrequency AnalyzerSmell.Board Hub
PriceFreeFree
Rating4.5 (188 ratings) — better—
Positive reviews9.1% of reviews—
Number of ratings188 — better—
Update frequencyWeekly — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPod — better
Requires iOS17.215.6 — better
Further details — not scored
Size35 MB58 MB
Age rating4+4+
DeveloperManfred KuegelSmartNanotubes Technologies

In-app purchases

10 purchases

Frequency Analyzer

Subscriptions9
  • Frequency Analyzer Pro Weekly$2.997 Days
  • Frequency Analyzer Pro Weekly3 Days trial$2.997 Days
  • Frequency Analyzer Pro Monthly7 Days trial$3.991 Month
Show 6 more
  • Frequency Analyzer Pro Monthly7 Days trial$4.991 Month
  • Frequency Analyzer Pro Monthly$4.991 Month
  • Frequency Analyzer Pro Annual7 Days trial$29.991 Year
  • Frequency Analyzer Pro Annual7 Days trial$44.991 Year
  • Frequency Analyzer Pro Annual$44.991 Year
  • Frequency Analyzer Pro Annual3 Days trial$44.991 Year
One-time1
  • Pro access for lifetime$89.99
None

Smell.Board Hub

No in-app purchases

Questions

Is Frequency Analyzer free?
Frequency Analyzer is free to download, with in-app purchases available.
Is Smell.Board Hub free?
Smell.Board Hub is free to download, with no in-app purchases.
Do Frequency Analyzer or Smell.Board Hub have ads?
Neither Frequency Analyzer nor Smell.Board Hub shows ads.
Which is updated more often, Frequency Analyzer or Smell.Board Hub?
Frequency Analyzer ships an update weekly, and Smell.Board Hub every 5 weeks. Most recently, Frequency Analyzer was updated on November 8, 2026 and Smell.Board Hub on November 8, 2026.

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