Live Spectrogram vs KQ MIDI Modulate
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Live Spectrogram
Visualize sound frequencies in real-time with this tool. It displays audio intensity across time and frequency using color, helping you perfect singing, analyze animal calls, or locate household noises.
- Real-time audio visualization
- Frequency analysis
- Time-based spectrum display
- Intensity shown by color
- Singing voice perfection
- Animal call analysis
- Sound source identification
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Visualize audio with this handy tool. It displays the frequencies of sound around you over time. The horizontal axis is time, the vertical is frequency, and the intensity of frequencies is shown using pretty shades of red. Use it to: Perfect your singing voice Analyze the call of animals Identify and locate annoying sounds around your house Learn about the world of frequency analysis I hope you enjoy this handy little tool!
KQ MIDI Modulate
This tool is designed for advanced MIDI users to manipulate and route MIDI signals. It offers extensive control over signal conversion, note triggering, and pad-based MIDI output, including AUv3 plugins. It does not produce sound on its own.
- MIDI signal conversion
- 8x16 pad output
- Free MIDI device routing
- AUv3 plugins included
- Note and control signal triggering
- Customizable signal filtering
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This is a tool for MIDI experts. Not recommended for beginners. - This app by itself does not produce sound. - It converts input MIDI signals and outputs them. - You can use 8x16 pads to output any MIDI signal. - You can route MIDI devices freely. - This app includes 2 AUv3 Plugins. - Compatible only with MIDI 1.0; MIDI 2.0 is not supported. - The developer uses this app conveniently with a MIDI wind controller. Convert Converts the values of control signals. Cannot be set per channel. Note Ctrl, Threshold: Transmit note on messages only if the value of the Note Ctrl is above the threshold. Key: Key of the note signal Vel1: Velocity of Note On Vel0: Velocity of Note Off CC: Control Change AT: Channel Aftertouch PB: Pitch Bend PC: Program Change N/A: Not applicable HR: High Resolution - when enabled, handles 14-bit signals. E: Envelope, tap to open the settings window. F: Filter, tap to open the settings window. LPF: Low-pass filter, smoothes out value changes. The higher the Strength value, the slower the change. HPF: High-pass filter, applies only abrupt value changes. The value automatically approaches the Return Base value. The higher the Strength value, the faster the change. Tap the graph to switch between line graph, history, and bar graph. Long press the graph and tap “Edit Curve” to edit the curve. "- 0 +" denotes the offset; this value is added to the input value. Press the button in the top left corner to switch to a minimized view. The "!" in the top right corner is the panic button. Pressing it sends All Notes Off and All Sound Off messages. Trigger Sends signals according to the rules upon receiving specified MIDI signals. You can specify channels. Harmony: Shifted note signals Channel Rewrite: Rewrite of channels Signal Trigger: Trigger of any MIDI signal Value Offset: Increment/decrement of value Filter: Suppression of transmission Pad Consists of 8x16 pads. Note: Note signal CC/AT/PB Oneshot: Control signal (when pressed) CC/AT/PB On/Off: Control signal (press/release) Program: Patch Change (bank selectable) Convert Offset: Offset specification for the Convert screen Load Preset: File loading on the Profiles screen Misc/SysEx: Any signal Latch: Pads become toggles. If a group is specified, the pads act as radio buttons. Options Key Delay: Delays Note On Velocity Convert: When outputting Vel1 in Convert, select whether to always convert or only when legato is not present MIDI Rx Channel: Receiving channel MIDI Tx Channel: Transmitting channel Filter Other Channel: Suppress transmission of channels other than receiving channel Duplicated Notes: Specifies handling of duplicated notes Note that: The application and description contain machine-translated text.
Screenshots
Verdict
The clearest difference is update cadence: KQ MIDI Modulate at fortnightly against Live Spectrogram's every 31 months. KQ MIDI Modulate also leads on rating (5.0 vs 4.8). Live Spectrogram's advantage is price ($1.99 vs $5.99) and chart position (#184 vs unranked). On review sentiment, ratings volume, ads and in-app purchases 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
Live Spectrogram costs $1.99 and KQ MIDI Modulate $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
KQ MIDI Modulate holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 6 and 4 respectively. Written reviews point the same way: 63% of Live Spectrogram's written reviews are positive against 67% of KQ MIDI Modulate's.
Live Spectrogram ships an update every 31 months, KQ MIDI Modulate fortnightly. The most recent releases landed on September 18, 2026 and September 19, 2026 respectively.
| Parameter | Live Spectrogram | KQ MIDI Modulate |
|---|---|---|
| Price | $1.99 — better | $5.99 |
| Rating | 4.8 (6 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 62.5% of reviews | 66.7% of reviews — better |
| Number of ratings | 6 — better | 4 |
| Update frequency | Every 31 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #184 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 15 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Krueger Systems, Inc. | Ryouta Kira |
Customer experience
Live Spectrogram
KQ MIDI Modulate
In-app purchases
Live Spectrogram
No in-app purchases
KQ MIDI Modulate
No in-app purchases
Questions
Is Live Spectrogram free?
Is KQ MIDI Modulate free?
Which has better reviews, Live Spectrogram or KQ MIDI Modulate?
Do Live Spectrogram or KQ MIDI Modulate have ads?
Which is updated more often, Live Spectrogram or KQ MIDI Modulate?
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