Comparison

KQ MIDI Modulate vs my15c

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • MIDI signal conversion
  • 8x16 pad output
  • Free MIDI device routing
  • AUv3 plugins included
  • Note and control signal triggering
  • Customizable signal filtering
Features
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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.

About

my15c

Features
Read full description

my15C is a faithful emulation of the classic 15C — the legendary RPN scientific programmable calculator, running the original Voyager-series microcode ROM, cycle-accurate. Built for engineers, scientists, and RPN enthusiasts who want the real thing in their pocket — not just a look-alike. FEATURES • Authentic 15C ROM emulation — same logic, same quirks as the original 1982 hardware • Full RPN entry with a 4-level stack • Complex number arithmetic • Matrix operations • Numerical integration (∫f(x)) • Root solving (SOLVE) • Full programmability — write, edit, and run your own programs • Continuous memory with iCloud sync across your devices • Authentic 7-segment LCD display and keyboard layout • Landscape-optimized for iPhone, iPad, and Mac

Screenshots

KQ MIDI Modulate4 screens
my15c4 screens

Verdict

The call

The clearest difference is price: my15c at Free against KQ MIDI Modulate's $5.99. my15c also leads on update cadence (every 3 days vs fortnightly). KQ MIDI Modulate's advantage is in-app purchases (none vs 1) and iOS requirement (15.0 vs 26.0). 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

my15c is free to download; KQ MIDI Modulate costs $5.99 up front. my15c sells 1 one-off in-app purchase. KQ MIDI Modulate asks for nothing beyond the download.

UpkeepUpdate frequency

KQ MIDI Modulate ships an update fortnightly, my15c every 3 days. The most recent releases landed on October 6, 2026 and October 2, 2026 respectively.

Scorecard4 real differences · 6 level
KQ MIDI Modulate versus my15c: the parameters behind the verdict, then further details
ParameterKQ MIDI Modulatemy15c
Price$5.99Free — better
Rating5.0 (4 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings4 — better—
Update frequencyFortnightlyEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.0 — better26.0
Further details — not scored
Size2 MB55 MB
Age rating4+4+
DeveloperRyouta KiraMiroslav Perovic

In-app purchases

None

KQ MIDI Modulate

No in-app purchases

1 purchases

my15c

One-time1
  • Unlock Full App$9.99

Questions

Is KQ MIDI Modulate free?
KQ MIDI Modulate costs $5.99, with no in-app purchases.
Is my15c free?
my15c is free to download, with in-app purchases available.
Do KQ MIDI Modulate or my15c have ads?
Neither KQ MIDI Modulate nor my15c shows ads.
Which is updated more often, KQ MIDI Modulate or my15c?
KQ MIDI Modulate ships an update fortnightly, and my15c every 3 days. Most recently, KQ MIDI Modulate was updated on October 6, 2026 and my15c on October 2, 2026.

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