Comparison

Clef Trainer vs Preludia

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

Head to head
About

Clef Trainer

Features
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Ready to read sheet music faster? Clef Trainer offers focused practice drills designed to significantly improve your speed and accuracy in recognizing musical notes on the staff. Our clean and simple interface makes practicing easy and effective. Get started right away: Key Features: Focused Note Practice: Quickly identify notes presented on the musical staff. Customizable Sessions: Choose your practice duration – select from timed sessions (1, 10, 30 minutes) or practice indefinitely with the 'Unlimited' option. Clef Selection: Train on Treble clef, Bass clef, or a mix of both (Confirm if users can select individually in Settings, if so, mention it). Intuitive Interface: See the note clearly displayed on the staff and identify it (Mention the input method if relevant, e.g., "using the on-screen piano keys"). Performance Tracking: Monitor your score and accuracy during practice sessions. Your Statistics: Track your progress over time in the dedicated statistics section. See how your note recognition skills improve! (You can elaborate slightly here if the stats section shows specific metrics like accuracy %, notes per minute etc.) [Your App Name] is perfect for: Beginner musicians learning to read notes. Students needing extra sight-reading practice. Anyone wanting a quick and straightforward tool to keep their note-reading skills sharp. Download Clef Trainer now and start mastering music note recognition today!

About

Preludia

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Preludia is a piano practice support app for mobile devices, developed by Také (たけ) / Mordent Music. This app turns your smartphone/tablet into your most useful practice partner, monitoring and evaluating your piano playing to help you make progress. And you can use it with common digital pianos, as well as acoustic pianos with a MIDI output unit. Find Your Music, Feel Your Joy! [* Highlights *] • Evaluates piano performance from 4 criteria: 1. Attack Timing 2. Release Timing 3. Touch Strength 4. Sound Balance • Allows you to view detailed information for every individual note you play • Boosts and maintains your motivation with a play scoring system • Equipped with many useful practice support features • Supports the diverse playing styles unique to classical music [* Pro Mode *]  This app is free to play, but you can upgrade to Pro Mode [paid] to unlock exclusive pieces and features for an even richer experience. • Playable Pieces (Number of pre-installed pieces) - Free Play:20 standard pieces + 3 training pieces with a total of 8 variations - Pro Mode:55 standard pieces + 9 traning pieces with a total of 33 variations (* DLC pieces are also available in addition to the pre-installed pieces. [currently 40+ pieces available]) • Pro Mode Exclusive Features - Expanded tempo adjustment range (50% - 150%) - Save and load your performance data - Playback loaded performance data - Ad-free (* Excluding the limited-time free play service for individually purchased pieces) [* Included Pieces *] The app includes over 50 pre-installed piano pieces by the various classical composers. (below) These pieces feature famous classical favorites and training exercises for finger practice. In addition to the pre-installed library, we also offer a growing selection of DLC pieces (paid / free). We will continue to release new DLC pieces on an ongoing basis! ##### List of Pre-installed pieces ##### • 1. Standard Pieces (55 pieces) - Bach: Invention No. 1 to 15 (+ No. 1 Variant) - Bach: Sinfonia No. 1 to 15 - Bach: The Well-Tempered Clavier: Book I No. 1 - Prelude, Fugue - Beethoven: 6 Ecossaises in E-flat major, WoO. 83 - Beethoven: Piano Sonata No. 8 "Pathétique" - 2nd, 3rd Mov. - Burgmüller: Candour, Arabesque, Ballad, Trotting from 25 Etudes - Chopin: Etude, Op. 10-5 - Chopin: Fantasie-Impromptu, Op. 66 - Chopin: Nocturne No. 2 - Chopin: Waltz No. 6, 19 - Daquin: Le Coucou - Debussy: Passpied from Suite Bergamasque - Grieg: Batterfly from Lyric Pieces Book III) - Handel: The Harmonious Blacksmith - Hanon: The Virtuoso Pianist No. 1, 2, 3, 4, 5, 39(Scale), 60(The Tremolo) - Joplin: Maple Leaf Rag - Mozart: Piano Sonata No. 11 - 3rd Mov. (Turkish March) - Mozart: Piano Sonata No. 16 - 1st Mov. - Petzold: Minuet in G major - Ravel: Menuet sur le nom d'HAYDN - Schubert: Moment Musical No. 3 - Schubert: Impromptu D 899/2 • 2. Traning Pieces (9 pieces with a total of 33 variations) - Czerny: 30 Etudes - No. 1 - Czerny: The School of Velocity - No. 1 - Hanon: The Virtuoso Pianist No. 1, 2, 3, 4, 5, 39(Scales in All Keys), 60(The Tremolo) [* Web Site *] https://preludia.mordentmusic.com/en/home_en/ [* Term of Use *] https://preludia.mordentmusic.com/en/terms-of-use_en/ [* Privacy Policy *] https://www.mordentmusic.com/en/privacy-policy_en/ [* Support *] https://preludia.mordentmusic.com/en/support_en/ ------------------------------------ Preludia © 2025 Také (たけ) / Mordent Music

Screenshots

Clef Trainer3 screens
Preludia4 screens

Verdict

The call

The clearest difference is update cadence: Clef Trainer at every 4 days against Preludia's every 10 days. On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Clef Trainer sells 1 one-off in-app purchase and Preludia sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Clef Trainer ships an update every 4 days, Preludia every 10 days. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.

Scorecard1 real difference · 5 level
Clef Trainer versus Preludia: the parameters behind the verdict, then further details
ParameterClef TrainerPreludia
PriceFreeFree
Update frequencyEvery 4 days — betterEvery 10 days
AdsYesYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.114.5 — better
Further details — not scored
Size29 MB246 MB
Age rating4+4+
DeveloperTuan Anh NguyenKeiji Takeishi

In-app purchases

1 purchases

Clef Trainer

One-time1
  • Clef Trainer Plus$0.99
10 purchases

Preludia

One-time10
  • Les Barricades Mystérieuses$0.99
  • Etude in F minor, Op. 25-2$0.99
  • Preludes: Book I - No. 8$0.99
Show 7 more
  • Golliwogg's Cakewalk$0.99
  • Etude in A minor, Op. 25-11$1.49
  • Prelude in Db major, Op. 28-15$1.49
  • Etude Op. 65-3$1.49
  • Prélude (Tombeau de Couperin)$1.49
  • Aufschwung, Op. 12-2$1.99
  • Piano Sonata No. 8 - 1st Mov.$2.99

Questions

Is Clef Trainer free?
Clef Trainer is free to download, with in-app purchases available.
Is Preludia free?
Preludia is free to download, with in-app purchases available.
Do Clef Trainer or Preludia have ads?
Both Clef Trainer and Preludia show ads.
Which is updated more often, Clef Trainer or Preludia?
Clef Trainer ships an update every 4 days, and Preludia every 10 days. Most recently, Clef Trainer was updated on October 1, 2026 and Preludia on October 7, 2026.

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