Comparison

Tandem MIDI Canvas vs HarmoTuner

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

Head to head
About

Tandem MIDI Canvas

Design and build custom MIDI controllers on your iPhone or iPad. Save presets, perform with motion and snapshots, and collaborate in real-time with others. Features smart snapping, layout templates, and morphing between states.

Highlights
  • Build custom MIDI controller layouts
  • Save and recall presets
  • Perform with motion and snapshots
  • Real-time collaboration
  • Smart MIDI setup
  • Morphing between states
Features
Read full description

Tandem turns your iPhone or iPad into a customizable MIDI controller you can actually trust on stage. Build your own layouts in minutes, map them fast, save reusable presets, and perform with powerful features like snapshots, morphing, motion control, and real-time collaboration. Whether you’re producing in the studio, playing live, teaching, or building DJ performance layouts, Tandem gives you a fast, flexible way to create controllers that fit your workflow instead of forcing you into someone else’s. BUILD THE CONTROLLER YOU ACTUALLY WANT Create custom layouts with knobs, faders, XY pads, drum pads, buttons, toggles, momentary buttons, endless encoders, transport controls, and gyroscope-based motion. Start from a blank canvas or jump in quickly with templates for mixers, synth performance rigs, drum layouts, dashboards, and more. Save your setups as presets and reuse them whenever you want. FAST WORKFLOW, BUILT FOR REAL USE Tandem is designed to help you build quickly and perform confidently. Features include: • Smart snapping and responsive grids • Spacing tools for clean layouts • Focus Mode for precision editing • Fast MIDI Learn • Helpful hints and a replayable tutorial walkthrough • Smart MIDI setup so new controls can automatically map to unused assignments SHAPESHIFT YOUR PERFORMANCE This is where Tandem becomes more than a controller. Save up to 8 snapshots of an entire layout, including all control values. Instantly jump between states or smoothly interpolate between them using a Morph Driver. It’s perfect for live performance, evolving sound design, transitions, and expressive macro control. RANDOMIZATION YOU CAN PLAY Map Randomize to a button or pad and generate musical variation on demand. Great for experimentation, happy accidents, sound design, and live moments that feel alive instead of static. COLLABORATE IN REAL TIME With Tandem Mode, multiple devices can share and control the same layout together. Host or join a session and collaborate live across devices—ideal for bands, classrooms, writing rooms, rehearsals, and shared performance setups. Locally and Remotely via SharePlay! DJ AND PERFORMANCE READY Tandem isn’t just for synths and studio control. It can also power performance-oriented layouts for transport, mixing, browser access, FX control, looping, hot cues, waveforms, and more. Build focused pages for the way you actually perform. THEMES THAT LOOK GOOD AND HOLD UP ON STAGE Use high-contrast, stage-ready themes or create your own look. Tandem includes a redesigned Theme Maker plus import/export support for themes and preset packages so you can share setups and visual styles. FLEXIBLE CONNECTIVITY Connect with: • USB-C • Bluetooth MIDI • Wi-Fi Background processing helps keep MIDI flowing while you work. Tandem isn’t just a MIDI controller app. It’s a controller builder with performance features you usually only get from dedicated hardware—wrapped in a workflow that’s fast, modern, and easy to come back to. Design your ideal controller, save your favorite setups, morph entire layouts, and perform anywhere—solo or together.

About

HarmoTuner

Features
Read full description

HarmoTuner is a tuner and metronome designed to help ensembles explore harmony through just intonation. Alongside precise single-note tuning, HarmoTuner lets you choose a target chord and compare the current position of each chord tone with its just-intonation target. Use it for individual long-tone practice or for shaping intonation and resonance in wind bands, orchestras, chamber groups, and other ensembles. CHORD TUNING Choose a target from 96 chords, including C, Am, G7, and CM7. HarmoTuner detects up to four input tones and displays a separate gauge for each role in the chord, such as the root, third, fifth, and seventh. In addition to the deviation from equal temperament, a target marker shows where each tone sits in just intonation. You can also find possible chords by selecting the note names you hear, making it easy to choose a target even when you do not know the chord symbol. SINGLE-NOTE TUNER View the note name, frequency, and deviation in cents from the selected reference in real time. • Adjustable A4 reference pitch • Equal temperament, just intonation, Pythagorean tuning, and meantone temperament • Adjustable input sensitivity and lock sensitivity • Lock indicator for a stable pitch • Reference tone with selectable note and octave • Analysis display for waveform and harmonic content Use it not only for tuning an instrument, but also for long tones and for checking the stability of embouchure and breath support. METRONOME Set the tempo, meter, and subdivision, then follow the beat through sound and visual feedback. • 30–300 BPM • Meters from 1/4 to 10/4 • Quarter-note, eighth-note, triplet, and sixteenth-note subdivisions • Tap tempo • Tempo marking display • Optional screen-edge beat flash Practice intonation and tempo without switching between apps. THREE FOCUSED MODES Open Tuner, Chord, or Metronome directly from its own tab. HarmoTuner remembers your most recently used mode and settings, so you can get back to practice quickly. PRIVACY All microphone input is analyzed on your device. HarmoTuner does not save recordings, transmit audio to external servers, or collect personal information.

Screenshots

Tandem MIDI Canvas4 screens
HarmoTuner4 screens

Verdict

The call

The clearest difference is price: HarmoTuner at Free against Tandem MIDI Canvas's $14.99. HarmoTuner also leads on update cadence (every 2 weeks vs every 5 weeks). On ads, in-app purchases, device support and iOS requirement 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

HarmoTuner is free to download; Tandem MIDI Canvas costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Tandem MIDI Canvas ships an update every 5 weeks, HarmoTuner every 2 weeks. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

Scorecard2 real differences · 8 level
Tandem MIDI Canvas versus HarmoTuner: the parameters behind the verdict, then further details
ParameterTandem MIDI CanvasHarmoTuner
Price$14.99Free — better
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 5 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size24 MB1 MB
Age rating4+4+
DeveloperMitchell CohenShunsuke Hosomi

In-app purchases

None

Tandem MIDI Canvas

No in-app purchases

None

HarmoTuner

No in-app purchases

Questions

Is Tandem MIDI Canvas free?
Tandem MIDI Canvas costs $14.99, with no in-app purchases.
Is HarmoTuner free?
HarmoTuner is free to download, with no in-app purchases.
Do Tandem MIDI Canvas or HarmoTuner have ads?
Neither Tandem MIDI Canvas nor HarmoTuner shows ads.
Which is updated more often, Tandem MIDI Canvas or HarmoTuner?
Tandem MIDI Canvas ships an update every 5 weeks, and HarmoTuner every 2 weeks. Most recently, Tandem MIDI Canvas was updated on October 10, 2026 and HarmoTuner on October 13, 2026.

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