Comparison

BlueScalesTrainer vs Guitar Codex

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

Head to head
About

BlueScalesTrainer

Learn guitar scales with your own songs. Analyze music to find keys and display matching scales. Practice with visual fretboard views, adjustable speed, and effects. Supports foot pedal control and integrates with your iTunes library.

Highlights
  • Song key analysis
  • Visual scale patterns
  • Fretboard note display
  • Adjustable playback speed and pitch
  • Built-in audio effects
  • Foot pedal control support
  • Playlist management
Read full description

The BlueScalesTrainer was created by good motivation targets for 2019. Not loosing weight this year, but finally know where notes are on which fretboard position on my guitar to play solos. Like everywhere, this require a lot of practice and I started direct in the AppStore looking for suitable apps. Although there is a lot dealing with Scales, it is either too much, visually too small and often not helpful for practicing. The features I missed are now available in the BlueScalesTrainer: * The scales should be displayed while playing, so it needs a music audio player * New songs should be analyzed because I'm not able hear the key of a song * The scales should then be displayed individually in large size and as an overview, matching the selected song * Overview and single view of scale patterns should be switched by foot pedal * A fretboard view provides a complete overview and should also be able to hide notes. Thanks to my app BlueJamPlayer, I already had the basis for the audio player, song analysis and control via foot pedal. I also took over the effect section, so that you can use the 7 audio effects in the BlueScalesTrainer as well. Here are the extensive functions that I have integrated in the BlueScalesTrainer and everything without subscription, InApp Purchase or advertising: - The main Scales are included: Major, Minor, Pentatonic Major, Pentatonic Minor, Blues Major and Blues Minor - In total 360 scales for your training target to master your guitar solos - Per scale type each of the 12 keys and their 5 patterns according to the CAGED system could be selected - Scale view in 3 modes: Pattern single, Summary and Zoom view - New added large fretboard view, where either root notes, chord notes or all notes of the scale are displayed - Switchable display of the notes or note position in the scale - The player can also be controlled via Bluetooth from PagerTurner foot pedals - Alternative scale views can be switched via foot pedal - The pitch can be adjusted without changing the speed - Also the speed is adjustable without changing the pitch - Free configurable effects (reverb, delay, flanger, equalizer, filter) to improve the sound - All songs in your iTunes library can be used - Songs are analyzed for the key, so that the matching scale will be selected automatically - The BPM will also be analyzed and effects Delay/Flanger will be set to this BPM - In order to sort your session better, there is a playlist management with 16 playlists - Especially for practicing difficult passages, the A->B Play mode is optimal - For the direct start 14 loop songs of different styles already available Hope you enjoy learning Scales with BlueScalesTrainer!

About

Guitar Codex

This app offers a comprehensive suite of tools for guitarists of all levels, from beginners to experienced players. It includes a tuner, metronome, interactive chord and scale libraries, and a structured 140-lesson course covering theory, technique, and songwriting.

Highlights
  • Chromatic tuner with multiple presets
  • Metronome with tap tempo
  • Interactive circle of fifths
  • Extensive chord and scale libraries
  • 140 structured lessons
  • Fretboard diagrams with color-coded notes
Features
Read full description

Guitar Codex is the app you reach for every time you pick up a guitar. Find a chord, run a scale, tune up, or sit down for a proper lesson. It works for total beginners and for players twenty years in. THE TOOLS - Chord Finder: tap the frets on a blank fretboard and watch the chord names appear. Play a shape you can't name and find out what it is, or build a chord note by note and see how it's made. - Chromatic tuner with a smooth needle and presets for Standard, Drop D, Open G, DADGAD, and more. Reference pitch is adjustable from 432 to 445 Hz. - Metronome with tap tempo, time signatures, and a visual beat indicator. - An interactive circle of fifths: tap any key and see its seven chords, its key signature, and its relative key. THE LIBRARIES Every chord, scale, arpeggio, and triad renders on the same big, high-contrast fretboard diagram, with each note color-coded by its job in the shape: root, 3rd, 5th, and so on. You learn why a shape works, not just where your fingers go. - Chords: every common type and voicing, with CAGED positions up the whole neck - Scales: five boxes per scale, a full-neck view, and advice on when to use each one - Triads: three string sets, three inversions each, all on one page - Arpeggios: chord tones mapped across the neck for every quality THE COURSE 140 lessons in 12 modules take you from holding the guitar for the first time through chords, scales, theory, the CAGED system, progressions, modes, songwriting, technique, genre studies, and fretboard and ear mastery. Lessons teach with diagrams and real songs, and every one ends with a short Try It exercise you can do with the guitar in your hands. All of Module 1 is free. PAY ONCE, OWN IT FOREVER Guitar Codex has no subscription and never will. The free version includes the Chord Finder, the full tuner, the metronome, and a real taste of everything else. Two optional one-time purchases unlock the rest: Pro, the complete reference toolkit, and Complete, which adds all 140 lessons plus every lesson added in the future. Buy it once and it is yours for good.

Screenshots

BlueScalesTrainer4 screens
Guitar Codex4 screens

Verdict

The call

The clearest difference is review sentiment: Guitar Codex at 100% against BlueScalesTrainer's 50%. Guitar Codex also leads on price (Free vs $2.99) and rating (5.0 vs 4.0). BlueScalesTrainer's advantage is in-app purchases (none vs 3) and iOS requirement (12.0 vs 15.1). 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

CostPrice · In-app purchases · Ads · Monetization

Guitar Codex is free to download; BlueScalesTrainer costs $2.99 up front. Guitar Codex sells 3 one-off in-app purchases. BlueScalesTrainer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Guitar Codex holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 50% of BlueScalesTrainer's written reviews are positive against 100% of Guitar Codex's.

UpkeepUpdate frequency

BlueScalesTrainer ships an update every 5 months, Guitar Codex every 2 days. The most recent releases landed on October 13, 2026 and October 1, 2026 respectively.

Scorecard8 real differences · 2 level
BlueScalesTrainer versus Guitar Codex: the parameters behind the verdict, then further details
ParameterBlueScalesTrainerGuitar Codex
Price$2.99Free — better
Rating4.0 (1 ratings)5.0 (3 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings13 — better
Update frequencyEvery 5 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.1
Further details — not scored
Size39 MB39 MB
Age rating4+4+
DeveloperStefan ArnholdCampCheck Interactive LLC

Customer experience

BlueScalesTrainer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Guitar Codex

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

BlueScalesTrainer

No in-app purchases

3 purchases

Guitar Codex

One-time3
  • Guitar Codex Pro$9.99
  • Pro to Complete Upgrade$9.99
  • Guitar Codex Complete$19.99

Questions

Is BlueScalesTrainer free?
BlueScalesTrainer costs $2.99, with no in-app purchases.
Is Guitar Codex free?
Guitar Codex is free to download, with in-app purchases available.
Which has better reviews, BlueScalesTrainer or Guitar Codex?
Guitar Codex is rated higher. BlueScalesTrainer averages 4.0 out of 5 from 1 ratings, while Guitar Codex averages 5.0 from 3 ratings.
Do BlueScalesTrainer or Guitar Codex have ads?
Neither BlueScalesTrainer nor Guitar Codex shows ads.
Which is updated more often, BlueScalesTrainer or Guitar Codex?
BlueScalesTrainer ships an update every 5 months, and Guitar Codex every 2 days. Most recently, BlueScalesTrainer was updated on October 13, 2026 and Guitar Codex on October 1, 2026.

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