Comparison

WhatChord MIDI vs SynthBridge MIDI Synth

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

Head to head
About

WhatChord MIDI

Identify chords from live MIDI input or manual note entry. Explore harmony, build chords, and browse scales with musically informed analysis. Learn and understand music theory with real-time feedback.

Highlights
  • Real-time chord recognition
  • Manual chord lookup
  • Explore chords and scales
  • Musically informed analysis
  • Alternative chord interpretations
  • MIDI compatibility
Read full description

Identify chords from live MIDI or manual note entry, follow the key as you play, then explore the harmony behind them. Stop guessing what chord you're playing. WhatChord gives musicians fast, musically informed chord names and live key context. Connect a Bluetooth or USB MIDI keyboard for instant feedback, or use the lookup pad to enter notes from any instrument, sheet music, or recording. Auto key detection listens to your recent live chords, shows confidence, and waits when the evidence is ambiguous. Explore Chords and Explore Scales let you build and hear chords, browse a wide range of scales, inspect keyboard patterns, and understand diatonic harmony. Play it. Explore it. Learn it. WhatChord goes beyond simple note matching. Its musically informed analysis considers inversions, extensions, slash chords, altered tones, key context, and conventional naming practices so chord names appear the way musicians expect to see them. When you're comping with a bassist, Ensemble mode names rootless voicings as the chords they imply and marks the implied root on the keyboard. FEATURES - Real-time chord recognition Chord names update immediately as you play. - Automatic key detection Auto mode estimates the current key from recent live chords, shows confidence across major and minor keys, and can keep the app's key context following your playing. - Manual chord lookup Enter notes directly to identify a chord, choose its bass note, and inspect alternative interpretations without connecting a MIDI device. - Explore chords Tap the chord card to open explore mode and build or hear chords without a keyboard by adjusting the root, quality, extensions, and bass note. - Explore scales Tap the scale-degree strip to browse a wide range of scales with tones, keyboard patterns, and diatonic chords. - Musically informed analysis Recognizes inversions, extensions, slash chords, upper structures, altered tones, and complex harmony. - Ensemble mode When comping with a bassist, switch to Ensemble so rootless voicings are named as the chords they imply. - Alternative interpretations See other valid chord names when more than one reading makes musical sense. - Context-aware spelling Uses enharmonic notation based on key signature and chord function. - Customizable notation Choose the chord symbol style you prefer. - MIDI compatibility Works with standard Bluetooth MIDI and USB MIDI keyboards and controllers. RECOGNITION WhatChord identifies everything from simple triads to rich extended harmony and follows key context from real playing. Whether you're practicing theory, learning progressions, exploring altered dominants, or working through dense extended chords, the app names what you play with accuracy and musical intent. PRIVACY WhatChord is free, contains no ads, and collects no personal data. All analysis happens locally on your device. GET STARTED Play through MIDI, enter notes manually, or start exploring chords, keys, and scales right away.

About

SynthBridge MIDI Synth

Transform your device into a versatile MIDI sound module and virtual piano. Load SoundFont files, connect controllers, and utilize expressive performance tools for practice, production, or live music.

Highlights
  • MIDI controller support (Bluetooth, USB, Network)
  • SoundFont (SF2/SF3) loading and playback
  • Multi-touch piano keyboard and drum pads
  • Pitch bend and modulation wheels
  • MIDI file playback and recording
  • Customizable velocity curves
Features
Read full description

Connect your MIDI keyboard, choose a sound, and play. SynthBridge turns your phone or tablet into a portable sound module and practice workspace. You can also start with the on-screen piano and drum pads. Your sounds: use the built-in library or import SF2/SF3 SoundFonts. Layer sounds and adjust their balance, effects and keyboard ranges. Your keyboard: connect compatible USB MIDI or Bluetooth MIDI devices. Control supported parameters with MIDI CC messages. Your practice: play MIDI files, follow the note visualization, and combine a metronome, loops and Style accompaniment. Your ideas: record MIDI performances, keep named drafts, preview takes and export MIDI files. MIDI files can also be converted to WAV or AAC audio. Your setup: save performance scenes and return to your sounds and playing settings. Use portrait or landscape layouts on phones and tablets. Some features and resources require in-app purchases. iOS or iPadOS 15.0 or later. USB and Bluetooth MIDI require compatible devices and accessories. https://synth.64bit.us/privacy.html https://synth.64bit.us/terms.html

Screenshots

WhatChord MIDI4 screens
SynthBridge MIDI Synth4 screens

Verdict

The call

The clearest difference is in-app purchases: WhatChord MIDI at none against SynthBridge MIDI Synth's 7. WhatChord MIDI also leads on rating (5.0 vs 4.8). SynthBridge MIDI Synth's advantage is ratings volume (4 vs 1). On price, review sentiment, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SynthBridge MIDI Synth sells 7 in-app purchases, starting at $1.99 per month. WhatChord MIDI asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

WhatChord MIDI holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

WhatChord MIDI ships an update weekly, SynthBridge MIDI Synth every 2 weeks. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
WhatChord MIDI versus SynthBridge MIDI Synth: the parameters behind the verdict, then further details
ParameterWhatChord MIDISynthBridge MIDI Synth
PriceFreeFree
Rating5.0 (1 ratings) — better4.8 (4 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings14 — better
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size24 MB76 MB
Age rating4++4
DeveloperAaron Bull Schaefer啟东 徐

Customer experience

WhatChord MIDI

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

SynthBridge MIDI Synth

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

WhatChord MIDI

No in-app purchases

7 purchases

SynthBridge MIDI Synth

Subscriptions2
  • Cloud Monthly7 Days trial$1.991 Month
  • Cloud Yearly7 Days trial$12.991 Year
One-time5
  • Supporter Tip$0.99
  • Remove Ads$1.99
  • Supporter Plus$4.99
Show 2 more
  • SynthBridge Pro$4.99
  • Supporter Patron$9.99

Questions

Is WhatChord MIDI free?
WhatChord MIDI is free to download, with no in-app purchases.
Is SynthBridge MIDI Synth free?
SynthBridge MIDI Synth is free to download, with in-app purchases available.
Which has better reviews, WhatChord MIDI or SynthBridge MIDI Synth?
WhatChord MIDI is rated higher. WhatChord MIDI averages 5.0 out of 5 from 1 ratings, while SynthBridge MIDI Synth averages 4.8 from 4 ratings.
Do WhatChord MIDI or SynthBridge MIDI Synth have ads?
Neither WhatChord MIDI nor SynthBridge MIDI Synth shows ads.
Which is updated more often, WhatChord MIDI or SynthBridge MIDI Synth?
WhatChord MIDI ships an update weekly, and SynthBridge MIDI Synth every 2 weeks. Most recently, WhatChord MIDI was updated on October 22, 2026 and SynthBridge MIDI Synth on October 25, 2026.

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