Chord Analyzer Z vs KeyJaan!
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Chord Analyzer Z
Analyze music in real-time with visual and audible feedback. Record and playback audio, convert to MIDI, and identify chord structures and sound strength for instruments and vocals.
- Real-time chord and harmony analysis
- Spectrum Roll Graph visualization
- Audio recording and playback
- MIDI file conversion and sharing
- Flush Keyboard and Pitch Pipe
- Zoom and scrollable keyboard
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◎ Newly added conversion output to MIDI file (SMF) and file sharing function. ● Equipped with "Spectrum Roll Graph" that allows you to visually check the chord structure and sound strength of singing voice and harmony of musical instruments in real time. ● The sound picked up by the built-in microphone is recorded automatically saved. If you play the file, you can reproduce and check it as many times as you like. ● You can use not only recorded files but also audio files shared from other apps. ● The pitch and strength of chords and single notes can be checked both visually and audibly using "Flush Keyboard" and "Pitch Pipe". ● Simply touch the Spectrum Roll Graph to repeat playback of the same point any number of times. ● The keyboard and the graph can be freely controlled by intuitive touch operations for zooming and scrolling. ・Because the musical tone composition of multiple instruments and singing voices such as choruses and ensembles can be viewed in real time in the form of power spectra, it is also useful for play by ear . ・By playing the pitch pipe while looking at the spectrum graph, you can hear the harmony parts and the chords of the instruments. ・Please use it for checking and practicing the sound of the harmony part of karaoke. ・You can observe the overtone components that characterize musical instruments and singing voices. ・It is also useful for chord analysis and pitch analysis of music played in the background, such as Apple Music and YouTube. ■ Features of the app ・Real-time analysis of chords and harmony ・Various and rich screen display ・Screen mode linked to device orientation ・Real-time analysis of microphone input sound ・Recording of microphone input sound ・Playback of recorded files ・Playback loop, playback jump ・Analysis of recorded files ・Play shared files ・Analysis of shared files ・Pitch pipe ・Zoom & scroll keyboard ・Spectral Roll Graph ・Flash Keyboard ・(NEW) Conversion output to MIDI file (SMF) and file sharing ● Display items (real time) ・Spectrum Roll Graph ・MIDI note number ・Power Spectrum ・Oscilloscope ・Microphone input level ・Audio level meter ・Playback progress bar ● Sound playback ・Audio files (recorded files, shared files) ・Loop playback ・Replay jump ・Pitch pipe (6 types of tones, keyboard tap) ● Precautions ・To prevent howling, the microphone input signal is automatically disabled during pitch pipe or audio file playback. ・Instrumental sounds and singing voices contain sounds of various frequencies, such as fundamental tones and integer harmonics, and this app allows you to visually observe them.
KeyJaan!
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Your songs become the game. KeyJaan! is a chord-progression rhythm game that analyzes songs from your own music library — right on your device. Pick a song, and its tempo, beats, bars and chord progression become a playable chart in seconds. No sheet music, no chart downloads. ■ Three ways to play Plug in a MIDI keyboard and your real playing becomes the score Use the microphone to play with a piano or your voice (experimental) No instrument? Tap the beat and swipe the chords ■ Music theory scores points 7th chords, slash chords, modulations, voice leading — the more musical your playing, the higher the score. Harder songs multiply your points. Left hand rides the beat, right hand sings the melody. ■ The crowd goes wild Ten audience characters react to your playing in real time. Nail a 7th and they'll actually hear it. ■ Records that stack up Achievements, daily streaks, per-song best scores and rankings. Chase that S rank — it's reserved for near-perfect play. ■ 6 demo songs included Original demo tracks are bundled and pre-analyzed, so you can play the moment you download. ■ Private by design Analysis and scoring happen entirely on your device. Your songs never leave it. No data collection, no ads. FREE: 6 demo songs + analyze up to 5 of your own songs, with a 7-day full-feature trial (1-minute mode stays available afterwards). KEYJAAN PRO (one-time purchase): unlimited analysis + all play lengths. No subscription. Works with: MIDI keyboards (USB/Bluetooth) / your music library / audio files (mp3, m4a, wav and more) Note: DRM-protected streaming tracks (e.g. Apple Music subscription songs) cannot be analyzed.
Screenshots
Verdict
The clearest difference is price: KeyJaan! at Free against Chord Analyzer Z's $1.99. Chord Analyzer Z's advantage is in-app purchases (none vs 1) and iOS requirement (13.0 vs 17.0). 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
KeyJaan! is free to download; Chord Analyzer Z costs $1.99 up front. KeyJaan! sells 1 one-off in-app purchase. Chord Analyzer Z asks for nothing beyond the download.
| Parameter | Chord Analyzer Z | KeyJaan! |
|---|---|---|
| Price | $1.99 | Free — better |
| Positive reviews | 33.3% of reviews | — |
| Update frequency | Every 4 months | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 29 MB | 90 MB |
| Age rating | 4+ | 4+ |
| Developer | Masanori Katsuta | Mamiko Tsukamoto |
In-app purchases
Chord Analyzer Z
No in-app purchases
KeyJaan!
- KeyJaan Pro$9.99







