Comparison

丸単 vs Trombone Trainer

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

Head to head
About

丸単

Features
Read full description

丸単は、韓国語の単語学習を毎日続けるための単語帳アプリです。 レベル診断から始めて、自分に合った教材に進み、学習した単語を復習できます。四択、フラッシュカード、翻訳練習を組み合わせて、見て分かる単語から思い出して使える単語へ育てていきます。 主な機能: - レベル診断 - 毎日の単語学習 - TOPIK・ハン検レベル別教材 - 復習モード - 学習記録と連続学習 - Appleアカウントでのログイン - アカウント削除 まずは無料で学習を始められます。 まずは無料で学習を始められます。一部のTOPIK・ハン検レベル別教材は、アプリ内課金で追加できます。

About

Trombone Trainer

This app helps brass players improve their trombone slide technique through interactive exercises and real-time scoring. It offers a slide position chart, ear transcription, and built-in practice libraries. Track your progress with detailed statistics and unlockable badges.

Highlights
  • Interactive slide position chart
  • Real-time scoring and clean-run detector
  • Transcribe music by ear onto staff
  • Bass-clef staff notation
  • Play-along loops with chords
  • Progress tracking and unlockable badges
  • Multiple note name display options
Features
Read full description

Trombone Trainer is a trombone slide position chart and practice game for brass players. Pick an exercise, hit play, and move to the correct slide position as each note sounds — the app scores your trombone slide positions in real time and highlights the note you're on, so you build the link between what you see on the staff, what you hear, and where your slide goes. Built for trombonists: • Arm slide — play it like a real trombone. Hold the phone in front of you and move your arm: the front camera reads how far the phone is from your face, and the on-screen slide follows, position for position. Fit it to your own reach in two taps, then fine-tune any position. It’s optional — touch still works — and nothing is recorded or leaves your device. • Interactive slide position chart — the on-screen chart shows the right slide position for every note (all seven), and real-time scoring gives you credit for holding it as the note plays, with a clean-run detector that rewards mistake-free passes. • Transcribe by ear — play a passage on your instrument and the app writes it onto the staff, note by note, in your key, so you can build or fix a song without tapping each one. • Bass-clef staff — everything is written and read in bass clef, the way trombone music actually looks. • Play-along loops — eight measures on the staff, played back with a piano-style chord under each measure, so you train positions in a musical context, not in silence. • Alternate positions — set your own preferred slide position for notes that can be played in more than one place. • Swipe to control — swipe left/right to change tempo. • Trombone scales and studies — built-in libraries of major and minor scales, chromatics, arpeggios, and technical etudes for daily brass practice. • Track your progress — daily/weekly/monthly trends, streaks, and unlockable badges, plus a full stats screen for every song with an accuracy-over-time chart. Your best score, average, and attempt count show right in the song list. Read music your way: • Note names in letters (C D E), German (H / B), or fixed-do solfège (Do Re Mi) — switch independently of the app language. • Available in English, Spanish, French, German, Portuguese, Italian, Japanese, Korean, Dutch, Polish, Swedish, Norwegian, and Chinese. Free to start: • The free version includes trombone scale libraries so you can practice positions right away. • Upgrade to Standard to unlock every song, import songs and libraries, and share songs; Pro adds creating, deleting, and exporting whole libraries. Both are one-time purchases — no subscription. Whether you're a beginner learning where the slide positions are or an advancing brass player pushing tempo, Trombone Trainer keeps your trombone practice focused, musical, and measurable.

Screenshots

丸単4 screens
Trombone Trainer4 screens

Verdict

The call

丸単 and Trombone Trainer are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. 丸単 sells 10 one-off in-app purchases and Trombone Trainer sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

丸単 ships an update every 4 days, Trombone Trainer every 5 days. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

ScorecardNo meaningful differences
丸単 versus Trombone Trainer: the parameters behind the verdict, then further details
Parameter丸単Trombone Trainer
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 4 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better18.0
Further details — not scored
Size7 MB106 MB
Age rating4+4+
Developersungjae parkEdmund Trujillo

In-app purchases

10 purchases

丸単

One-time10
  • TOPIK Upgrade 3$0.49
  • TOPIK Upgrade 4$0.49
  • All Upgrade Mixed$0.49
Show 7 more
  • All Upgrade 4 TOPIK$0.99
  • TOPIK Upgrade 2$1.99
  • All Upgrade 3 TOPIK$1.99
  • All Upgrade TOPIK$1.99
  • All Upgrade HANKEN$1.99
  • All Upgrade 2 TOPIK$3.99
  • All Upgrade 1 TOPIK$4.99
2 purchases

Trombone Trainer

One-time2
  • Standard — All Songs$19.99
  • Pro — Author & Export$39.99

Questions

Is 丸単 free?
丸単 is free to download, with in-app purchases available.
Is Trombone Trainer free?
Trombone Trainer is free to download, with in-app purchases available.
Do 丸単 or Trombone Trainer have ads?
Neither 丸単 nor Trombone Trainer shows ads.
Which is updated more often, 丸単 or Trombone Trainer?
丸単 ships an update every 4 days, and Trombone Trainer every 5 days. Most recently, 丸単 was updated on October 24, 2026 and Trombone Trainer on October 19, 2026.

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