Solo vs StrumForge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solo
Master your guitar fretboard with this interactive trainer. Learn note names, intervals, chord changes, and scales through guided exercises. Designed by professional guitarists, it offers customizable workouts for all skill levels.
- Fretboard visualization
- Note name trainer
- Interval shape memorization
- Chord change outlining
- Scale practice
- Interactive fretboards
- Customizable workouts
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Solo is the ultimate practice App for mastering fretboard visualization, designed by world renowned guitarists Tom Quayle and David Beebee. Four powerful fretboard trainers allow you to work intuitively on each aspect of the visualization process; learning note names, memorising interval shapes, outlining chord changes, and practicing scales. Solo asks you to find intervallic functions against one root note, chord symbol or scale at a time, listens to the notes you play, and doesn’t move on until you’ve correctly found each note by its intervallic function in the specified order. Practice with Solo and finally learn your note names, master interval shapes, confidently play through chord changes and break out of scale boxes with intervallic functions. Start transforming your playing and confidence on the fretboard today! NOTE TRAINER The Note Trainer is perfect for beginner and intermediate players getting to grips with note names on the neck - the foundation of solid fretboard knowledge. ‣ Solo shows you random root notes to find and listens, waiting for you to get it correct. ‣ Slide on the interactive fretboards for helpful diagrams and to study alternative options. Choose from 6 string guitar (standard and 4ths tuning), 7 string guitar, 4 string bass & 5 string bass. ‣ Optional practice suggestions offer challenging ways to limit and test yourself. ‣ Duration based workouts allow you to craft the perfect practice session. INTERVAL TRAINER The Interval Trainer will help players at all levels work on interval shapes with intervallic functions - the key to unlocking true freedom on the fretboard. ‣ Choose any combination of intervallic functions to practice. ‣ Create custom interval groups or choose the intervals for ANY chord type or scale. ‣ The Interval Trainer will randomise your chosen intervals and ask you to find them against either a fixed or random root note. ‣ Slide on the interactive fretboards for helpful diagrams, showing you where all of the interval shapes are across the neck, and to study alternative options. Choose from 6 string guitar (standard and 4ths tuning), 7 string guitar, 4 string bass & 5 string bass. ‣ Duration based workouts allow you to craft the perfect practice session. CHANGES TRAINER In the Changes Trainer you find intervallic functions, using single notes to outline different chord types or sets of chord changes, a key skill for learning to improvise through chord changes. ‣ Practice outlining intervallic functions through over 100 common chord progressions and single chord exercises. ‣ 50 intervallic function levels. Go from simple chord tones to complex melodic structures and scales. ‣ Solo intelligently maps out the correct intervals over each chord and listens for you to play each intervallic function in the specified order. ‣ Powerful workout options provide almost limitless ways to challenge yourself. ‣ Transpose the key of any progression or exercise. ‣ Choose to randomly transpose the progression (or single chord exercise) each time it repeats. ‣ Work on voice leading chord tones through single note lines. SCALE TRAINER The Scale Trainer contains a vast array of scales and powerful workout options, allowing you to finally break out of the box and develop a much deeper understanding of how scales are constructed on the fretboard. ‣ Practice finding scales on the fretboard using intervallic functions. ‣ Over 50+ Scales and modes. ‣ Powerful workout options provide almost limitless ways to challenge yourself. ‣ Melodic sequence options let you focus on starting from any chord tone within the scale. ‣ Duration based workouts allow you to craft the perfect practice session.
StrumForge
This app helps guitarists expand their playing with over 1,000 riffs, exercises, and chord progressions. It features animated fretboard diagrams, synchronized TAB, and customizable backing tracks for improvisation and songwriting. Explore scales, triads, and arpeggios with dedicated trainers.
- 1,000+ riffs and exercises
- Theory-based chord progressions
- Animated fretboard diagrams
- Synchronized TAB
- Customizable backing loops
- Scale and triad trainers
- 23 sampled drum grooves
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Expand your playing vocabulary with over 1,000 riffs and exercises in StrumForge Pro, from blues and rock phrases to focused technique drills. Explore scales, triads, and arpeggios with dedicated trainers, using synchronized TAB and animated fretboard diagrams to connect the notes you hear with the shapes you play. Put those ideas into practice with over 1 million unique, theory-based chord progressions across every key. Choose your guitar sound, customize the rhythm, and build a backing loop for improvisation, songwriting, or exploring something new. No ads. No account required to get started. CHORD PROGRESSIONS • Choose 2, 4, 8, 12, or 16 chords for focused loops or longer sessions • Set your key, mode, chord types, tempo, and guitar sound • Lock chords, change voicings, or build your own progression • Browse roots, chord families, and exact types, and choose which chord colors Generate can use • Explore open chords, barre chords, triads, and power chords • Explore major, minor, diminished, augmented, suspended, sixth, seventh, ninth, 11th, and 13th chords—including add9, 6/9, and maj7#11 • Get helpful suggestions for compatible chord options and musical styles • See chord shapes outlined on the fretboard during playback or preview EXERCISES & RIFFS • Explore over 1,000 riffs and technique drills, from beginner to advanced • Practice picking, legato, slides, bends, blues, country, jazz, and more • Follow synchronized TAB and an animated fretboard • Hear ringing notes, sustained chord tones, bends, and prebends • Adjust tempo and key, loop with a count-in and metronome, and save favorites • Search by name or reference, and filter by difficulty, technique, and type • Use All keys for variety and triad or interval colors to highlight chord tones RHYTHM & DRUMS • Play along with 23 sampled drum grooves, including Rock, Jazz Swing, Driving Rock, Half Shuffle, and Pocket Funk • Explore rhythms in 4/4, 3/4, and 6/8 with the full Pro collection • Customize drum parts from light to busy and add fills • Choose guitar strumming patterns independently of the drum groove • Balance guitar and drum volumes, and save rhythm settings with favorites TRIADS & ARPEGGIOS • Explore triad inversions and how shapes connect across the fretboard • Practice with the Triad Trainer and Arpeggio Trainer • Practice nine arpeggio types across all five CAGED positions • Follow animated TAB and adjust tempo, direction, and rhythm SCALES & FRETBOARD • Improvise with matching mode and pentatonic scale diagrams • Choose a scale manually with separate root and scale selections • Explore individual CAGED shapes or the full fretboard • Show note or interval labels and highlight triads or characteristic intervals • View suggested chord fingerings and move diagrams along the fretboard • Use left-handed diagrams in portrait or landscape MAKE IT YOUR OWN • Preview a collection of light and dark themes • Create and save custom color themes with Pro UNLOCK STRUMFORGE PRO Unlock unlimited progression generation, longer progressions, musical styles, the full drum collection, trainers, exercises, and advanced scale tools. Pro also includes: • Save, revisit, and share favorite progressions • Sync favorites and preferences across devices with an account • Automatic practice tracking, session stats, and streaks • Guitar tuner with alternate tunings and reference tones • Metronome with tap tempo, subdivisions, swing, and saved presets • Additional 12-string, overdrive, and arpeggiated guitar sounds • Saved practice preferences Put music theory into practice and discover ideas for your own songs with StrumForge. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: StrumForge at Free against Solo's $17.99. StrumForge also leads on update cadence (every 2 days vs monthly) and review sentiment (100% vs 83%). Solo's advantage is ratings volume (657 vs 62) and chart position (#56 vs unranked). On rating, ads, in-app purchases and monetization model 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
StrumForge is free to download; Solo costs $17.99 up front. Solo sells 2 one-off in-app purchases and StrumForge sells 4 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.7 for Solo against 4.8 for StrumForge. That said, the two scores are not equally well evidenced: Solo has 657 ratings behind it against 62, so its average is the more settled of the two. Written reviews are what separate them: 83% of Solo's written reviews are positive against 100% of StrumForge's.
Solo ships an update monthly, StrumForge every 2 days. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.
| Parameter | Solo | StrumForge |
|---|---|---|
| Price | $17.99 | Free — better |
| Rating | 4.7 (657 ratings) | 4.8 (62 ratings) — better |
| Positive reviews | 83.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 657 — better | 62 |
| Update frequency | Monthly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Best chart rank | #56 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 231 MB | 70 MB |
| Age rating | 4+ | +4 |
| Developer | Trio Software Ltd | Adam Spain |
Customer experience
Solo
StrumForge
Bugs and requests
Solo
Reported bugs
3 issues- Crashes when launching the app
- Inconsistent note detection
- Inability to save progress or settings
Requested features
8 requests- Add ability to create custom chord progressions
- Integrate metronome functionality
- Provide visual representation of intervals on staff
- Add option to practice natural notes only
- Implement option to hear chord tones in the background
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- Allow randomization of scale order
- Add support for non-standard tunings
- Implement sound feedback when finding the correct note
StrumForge
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Solo
- Custom Tunings$1.99
- Custom Chord Progressions$5.99
StrumForge
- StrumForge Pro Weekly7 Days trial$2.997 Days
- StrumForge Pro Monthly$4.991 Month
- StrumForge Pro Annual$24.991 Year
- Lifetime Pro$49.99









