Comparison

Frequency Analyzer vs Welding Heat Input Calculator

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 advanced FFT analysis, SPL monitoring, and detailed visualizations. Record, analyze, and export audio data with precision calibration and multiple weighting filters.

Highlights
  • Real-time FFT analysis
  • Calibrated SPL measurements
  • 32-bit float audio recording
  • Synchronized video recording
  • Spectrogram and octave band analysis
  • 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

Welding Heat Input Calculator

Features
Read full description

Welding Heat Input Calculator is a focused engineering utility for welding procedure qualification and production control. Enter arc voltage, current, travel speed, and thermal efficiency to calculate arc power (kW), arc energy (kJ/mm), and net heat input in both kJ/mm and kJ/in. The app is built for practical WPS/PQR verification with decimal-pad data entry, fast keyboard dismissal, and metric/imperial switching.

Screenshots

Frequency Analyzer4 screens
Welding Heat Input Calculator3 screens

Verdict

The call

The clearest difference is price: Frequency Analyzer at Free against Welding Heat Input Calculator's $9.99. Frequency Analyzer also leads on update cadence (every 8 days vs every 6 months) and iOS requirement (17.2 vs 26.2). Welding Heat Input Calculator's advantage is in-app purchases (none vs 11). On 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

Frequency Analyzer is free to download; Welding Heat Input Calculator costs $9.99 up front. Frequency Analyzer sells 11 in-app purchases, starting at $2.99 per 7 days. Welding Heat Input Calculator asks for nothing beyond the download.

UpkeepUpdate frequency

Frequency Analyzer ships an update every 8 days, Welding Heat Input Calculator every 6 months. The most recent releases landed on September 27, 2026 and September 24, 2026 respectively.

Scorecard4 real differences · 6 level
Frequency Analyzer versus Welding Heat Input Calculator: the parameters behind the verdict, then further details
ParameterFrequency AnalyzerWelding Heat Input Calculator
PriceFree — better$9.99
Rating4.5 (166 ratings) — better—
Positive reviews10.0% of reviews—
Number of ratings166 — better—
Update frequencyEvery 8 days — betterEvery 6 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad — better
Requires iOS17.2 — better26.2
Further details — not scored
Size35 MB1 MB
Age rating4+4+
DeveloperManfred KuegelShanghai Sheyuan Network Technology Co., Ltd.

In-app purchases

11 purchases

Frequency Analyzer

Subscriptions10
  • Frequency Analyzer Pro Weekly3 Days trial$2.997 Days
  • Frequency Analyzer Pro Monthly7 Days trial$3.991 Month
  • Frequency Analyzer Pro Monthly$3.991 Month
Show 7 more
  • Frequency Analyzer Pro Monthly7 Days trial$4.991 Month
  • Frequency Analyzer Pro Monthly$4.991 Month
  • Frequency Analyzer Pro Monthly3 Days trial$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

Welding Heat Input Calculator

No in-app purchases

Questions

Is Frequency Analyzer free?
Frequency Analyzer is free to download, with in-app purchases available.
Is Welding Heat Input Calculator free?
Welding Heat Input Calculator costs $9.99, with no in-app purchases.
Do Frequency Analyzer or Welding Heat Input Calculator have ads?
Neither Frequency Analyzer nor Welding Heat Input Calculator shows ads.
Which is updated more often, Frequency Analyzer or Welding Heat Input Calculator?
Frequency Analyzer ships an update every 8 days, and Welding Heat Input Calculator every 6 months. Most recently, Frequency Analyzer was updated on September 27, 2026 and Welding Heat Input Calculator on September 24, 2026.

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