DR.Lissajous vs Voice Spectrogram Logger
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DR.Lissajous
Explore the visual patterns created by combining horizontal and vertical electron beam movements. Manipulate amplitudes, frequencies, and phase differences to generate unique spirograph-like curves on your screen.
- Create Lissajous curves
- Simulate electron beam motion
- Adjust amplitudes
- Modify frequencies
- Change phase difference
- Generate spirograph patterns
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Create Lissajous curves by combining the horizontal and the vertical motion of an electron beam on an oscilloscope. Tap the screen to get a spirograph like representation of your curve. Change the amplitudes, the frequencies and the phase difference to change the curve. http://www.youtube.com/watch?v=hN9jMaT_Zu8
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
Screenshots
Verdict
The clearest difference is review sentiment: DR.Lissajous at 50% against Voice Spectrogram Logger's 0%. DR.Lissajous also leads on rating (4.5 vs 1.0) and in-app purchases (none vs 1). On price, ratings volume, update cadence 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. Voice Spectrogram Logger sells 1 one-off in-app purchase. DR.Lissajous asks for nothing beyond the download.
DR.Lissajous holds the better App Store score, 4.5 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 50% of DR.Lissajous's written reviews are positive against 0% of Voice Spectrogram Logger's.
DR.Lissajous ships an update every 23 months, Voice Spectrogram Logger every 15 months. The most recent releases landed on July 17, 2026 and July 29, 2026 respectively.
| Parameter | DR.Lissajous | Voice Spectrogram Logger |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 23 months | Every 15 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.1 — better | 15.5 |
| Further details — not scored | ||
| Size | 41 MB | 7 MB |
| Age rating | 4+ | 12+ |
| Developer | Daniel Roth | Yukiko Iwai |
Customer experience
DR.Lissajous
Voice Spectrogram Logger
In-app purchases
DR.Lissajous
No in-app purchases
Voice Spectrogram Logger
- Remove Ads$3.99
Questions
Is DR.Lissajous free?
Is Voice Spectrogram Logger free?
Which has better reviews, DR.Lissajous or Voice Spectrogram Logger?
Do DR.Lissajous or Voice Spectrogram Logger have ads?
Which is updated more often, DR.Lissajous or Voice Spectrogram Logger?
Other comparisons
