MIDI SolFa Mode vs Guitar Intervals Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MIDI SolFa Mode
Explore music theory with an interactive instrument. Learn scales, modes, and solmization, or connect to MIDI devices. Play melodies, chords, and discover improvisational techniques.
- Interactive spiral and piano keyboards
- Study scales, modes, and circle of fifths
- Learn Movable-Do and Fixed-Do solmization
- MIDI input/output and file playback
- Improvise polyphonic canons
- Load custom sounds and MIDI files
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A unique musical instrument. An interactive music theory medium. An amazing solmization machine. A universal MIDI tool. All in one: "MIDI SolFa Mode-Go-Round" unites and extends the possibilities of the apps "Musk MIDI Keyboard", "Musk MIDI Player", "Musk Diatonic Modes" and the "SolFa Mode-Go-Round". Therefore there are many creative and didactic use cases. Play and grasp music! Use cases: ========== * Play on the diatonic or chromatic keyboard. * Study or teach scales, church modes, and the circle of fifths. * Discover improvising polyphonic canons. * Learn Movable-Do and Fixed-Do solmization. * Connect to your MIDI apps and devices or play with connected "SolFa Mode-Go-Rounds". * Load sounds and polyphonic pieces. * Tune into your part. Hear its solmization. Touch instruments: ================== * The app features a diatonically oriented spiral shaped keyboard with 7 keys per octave. (Tone circle) * With it you can easily play well sounding melodies and chords in major, minor or other church modes. + Besides it, there is a chromatic piano keyboard. (iPhone: Landscape orientation, iPad: double tap piano-button) Sounds: ======= * Instrumental sounds: a General-MIDI sound font is pre-installed. (See also "Musk MIDI Keyboard" for more options.) * To study church modes and solmization, the syllables "do re mi fa so la ti" where recorded in 3 octaves. + Freely mix instrument and solmization sounds. Listen to the solmization of the tenor, hear the bass as piano and the soprano as flute notes. + Choose a small choir ("Erlebnisland") with warm sounds or synthetic Bruno, who really sings to the point. Music theory: ============= * The generalised touch circle of fifth gives access to 12 tonics und 7 modes. * The touch instruments change according to the selected tonic and mode. * There are 5 mathematical-musical base modulations. * Interactive tutorials introduce you to the operation. * Get a fine feeling for the character differences between the diatonic scales Major (Ionian), natural Minor (Aeolean) and the church modes Dorian, Phrygian, Lydian, Mixolydian and Locrian. * Understand how they are interrelated. + Improvise up to five-part counterpoint canons "note-by-note": You play the melody and the canon assistent shows how to proceed. * You can also invent normal canons. Just play in half notes. + You can change labels on the tone circle, e.g. to test your or your students knowledge. Solmization: ============ * The syllables depend on the pitch, the chosen tonic/mode configuration and the solmization method. * They are shown on the tone circle and can be heared. * Solmization methods: absolute solmization (Fixed-Do), relative solmization (Movable-Do) and scale degree solmization. MIDI features: ============== * With this app, you can send and receive MIDI notes and play back MIDI files. * All features of "Musk MIDI Keyboard" and "Musk MIDI Player" are available. (See "Related Apps" in the App Store) + Record tracks and export midi files. + During recording of notes, the related solmization syllables can be attached to the track as lyrics. These can be shown by any MIDI-Karaoke player. + This app sends and receives configuration change commands. You can keep all connected "MIDI SolFa Mode-Go-Rounds" in sync. + You can also add bass notes with an external notation app. These will trigger tonic/mode changes. Synchronization: ================= + Notes and configuration changes are transmitted via MIDI to connected devices and apps. + Using SharePlay you can play with friends over the Internet and play back midi files synchronously. + Nearby devices, e.g. in the classroom, can synchronize their settings via OSC and OSC-Query. See also: ========= * "SolFa Mode-Go-Round", "Tonkreisel", "Musk MIDI Player", "Musk MIDI Keyboard". * Features marked with "*" are available in other apps. * Features marked with "+" are only available in this app. Have fun and let the mode go round! We love to hear feedback.
Guitar Intervals Pro
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Guitar Intervals shows you where every musical interval lies on the guitar neck, so you can recognize intervals by sight and by ear, and find them anywhere on the fretboard. Choose a root note and an interval, and the app highlights the root and the interval note on every string. Tap any note to hear how it sounds. FEATURES - 12 intervals, from minor 2nd up to the octave - 12 root notes - 9 tunings: standard, half step down, whole step down, drop tunings and more - Realistic fretboard view - Tap a note to hear it, with real guitar samples - Small download size, works offline WHO IS IT FOR Guitarists who want to understand the fretboard: beginners learning the notes, players who want to build chords and scales from intervals, and anyone training their ear and theory. Knowing intervals is the foundation of chords, scales, melodies and improvisation. Pick an interval, find it on the neck, play it, and the shapes will quickly become familiar. The app is free and supported by ads. Questions or suggestions? Write to us, we read every message.
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Verdict
The clearest difference is update cadence: MIDI SolFa Mode at every 3 months against Guitar Intervals Pro's every 39 months. MIDI SolFa Mode also leads on iOS requirement (14.0 vs 17.0). Guitar Intervals Pro's advantage is price ($2.99 vs $3.99). On ads, in-app purchases 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
MIDI SolFa Mode costs $3.99 and Guitar Intervals Pro $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MIDI SolFa Mode ships an update every 3 months, Guitar Intervals Pro every 39 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | MIDI SolFa Mode | Guitar Intervals Pro |
|---|---|---|
| Price | $3.99 | $2.99 — better |
| Rating | 4.5 (2 ratings) — better | — |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months — better | Every 39 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 45 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Dr. Garbers Softwareentwicklung | Andrii Pirumov |
In-app purchases
MIDI SolFa Mode
No in-app purchases
Guitar Intervals Pro
No in-app purchases
Questions
Is MIDI SolFa Mode free?
Is Guitar Intervals Pro free?
Do MIDI SolFa Mode or Guitar Intervals Pro have ads?
Which is updated more often, MIDI SolFa Mode or Guitar Intervals Pro?
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