Voice Spectrogram Logger vs ECEToolkit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Voice Spectrogram Logger
Visualize voice frequencies in a spectrogram from 20-2500Hz. Adjust display with sliders and log recordings to export as PNG files. Functions fully offline and supports background processing.
- Real-time voice spectrogram display
- Adjustable frequency range (20-2500Hz)
- Zoomable spectrogram with pinch gestures
- Customizable spectrogram gradation
- Logging mode with history export
- Offline functionality
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1. DESPLAY The spectrogram of voice is displayed in the range of 20 - 2500Hz. You can zoom in/out the spectrogram by pinching in/out smoothly. Also landscape orientation is supported. 2. USEFUL By moving "vivid" slider, the gradation of spectrogram is controlled. The gradation is also controlled by moving "baseline" slider in "Setting" tab and selecting "Mean" or "RMS" as the way of smoothing the spectrogram out. 3. LOGGING When "log" switch is ON, this app runs in the logging mode. To choose a past log from "History" tab, you can pull it from iPhone via email as a PNG file. 4. AVAILABLE Without cellular data service, the full functions are available. The background processing is supported. 5. TECHNICAL NOTE Sample rate: 44.1kHz Bit depth: 32bit float FFT window function: Blackman FFT samples: 4096
ECEToolkit
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A minimalistic, powerful, and effective electrical engineering toolkit! Contains many sub-apps to help students and professionals with electrical engineering specifics. Meant as a toolkit for engineers all around the world for the small intricacies and tedious activities in Electrical Engineering.
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Verdict
The clearest difference is in-app purchases: ECEToolkit at none against Voice Spectrogram Logger's 1. ECEToolkit also leads on update cadence (every 3 weeks vs every 15 months). Voice Spectrogram Logger's advantage is iOS requirement (15.5 vs 18.0). 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
Both are free to download. Voice Spectrogram Logger sells 1 one-off in-app purchase. ECEToolkit asks for nothing beyond the download.
Voice Spectrogram Logger ships an update every 15 months, ECEToolkit every 3 weeks. The most recent releases landed on October 2, 2026 and October 4, 2026 respectively.
| Parameter | Voice Spectrogram Logger | ECEToolkit |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 15 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.5 — better | 18.0 |
| Further details — not scored | ||
| Size | 7 MB | 14 MB |
| Age rating | 12+ | 4+ |
| Developer | Yukiko Iwai | Jason Todd Gentry |
In-app purchases
Voice Spectrogram Logger
- Remove Ads$3.99
ECEToolkit
No in-app purchases
Questions
Is Voice Spectrogram Logger free?
Is ECEToolkit free?
Do Voice Spectrogram Logger or ECEToolkit have ads?
Which is updated more often, Voice Spectrogram Logger or ECEToolkit?
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