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.
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.
- 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
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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/
Welding Heat Input Calculator
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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
Verdict
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
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.
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.
| Parameter | Frequency Analyzer | Welding Heat Input Calculator |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 4.5 (166 ratings) — better | — |
| Positive reviews | 10.0% of reviews | — |
| Number of ratings | 166 — better | — |
| Update frequency | Every 8 days — better | Every 6 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.2 — better | 26.2 |
| Further details — not scored | ||
| Size | 35 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Manfred Kuegel | Shanghai Sheyuan Network Technology Co., Ltd. |
In-app purchases
Frequency Analyzer
- 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
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- 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
- Pro access for lifetime$89.99
Welding Heat Input Calculator
No in-app purchases
Questions
Is Frequency Analyzer free?
Is Welding Heat Input Calculator free?
Do Frequency Analyzer or Welding Heat Input Calculator have ads?
Which is updated more often, Frequency Analyzer or Welding Heat Input Calculator?
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