C ChordLens

iPhone app

Find the chord from the notes. Then learn how to play it.

ChordLens turns a pile of notes into a named chord, then shows you the piano tones, guitar voicings, and string notes that make it usable in practice.

See the app Guide Support
Screenshots

Find, detect, then play.

Three screens, one flow: input notes, confirm the chord, then move into voicings.

ChordLens Find tab showing the idle piano and guitar layout.
Find starts with both instruments ready. Use the piano or fretboard to enter notes and begin building the chord.
ChordLens Find tab after detecting a C chord with highlighted piano and guitar notes.
Detection is mirrored across the app. The chord name, notation, piano keys, and guitar positions stay in sync as soon as notes are selected.
ChordLens Play tab showing an E major chord with piano tones and guitar voicing cards.
Play turns the chord into usable shapes. Browse roots and chord types, hear voicings, and inspect the sounding note on every string.
How to use

A compact guide to the app.

Find

Tap notes on piano or guitar. ChordLens names the chord in real time, shows the note names, and mirrors the same pitches on both instruments.

Play

Switch to the Play tab to choose a root and chord type directly, hear the piano tones, and browse guitar voicings for the same chord.

Pattern

Use the floating Pattern control to change how every play button performs the chord, from block playback to broken-chord patterns.

Playback patterns

Choose a global playback pattern once, then every play button uses it. Switch between block, up, down, bounce, spread, and pedal playback.

Guitar note labels

Each voicing card shows the sounding note for each string, so the shape is easier to read without mentally translating fret numbers first.

Exact piano note playback

The piano panel can replay the actual notes you tapped, which is helpful when octave placement matters.

One-tap transition into Play

When Find recognizes a chord, you can jump directly into the matching Play view instead of re-entering it manually.

Support

Need help, want to report something, or have a question?

Good details to include

  • Your device model and iOS version.
  • What chord or voicing you were trying to enter.
  • Which tab you were using: Find or Play.
  • What you expected to happen and what happened instead.
Privacy

Simple privacy by design.

No accounts or tracking

ChordLens does not ask you to create an account and does not include ad tracking or analytics SDKs.

Notes stay on your device

The notes and chords you play remain on your device. ChordLens is designed to work offline.