mellowD – Intonation Trainer

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Content rating
Everyone
10+
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Content rating
Everyone
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About this app

TRAIN YOUR INTONATION WITH PRECISION

mellowD helps beginners and advanced string instrument players systematically improve their intonation and sense of rhythm.
Play scales, randomly arranged notes, or complete pieces of music on your instrument—the app analyzes your pitch in real time and provides clear feedback on your accuracy and progress. In the PRO version, you can import and practice additional custom music pieces in .musicxml format. In orchestra mode, you will learn fast sight-reading and playing along within a virtual orchestra group.

No more guesswork. No more out-of-tune notes.
You can see instantly how cleanly you are playing. And if you are unsure which finger goes where in a given position, simply check the interactive fretboard tap!

CORE FEATURE: INTONATION TRAINING

• Play selected scales, random melodies, or complete practice pieces on your instrument

• Learn fast sight-reading and finger positioning on the fretboard
• Get used to playing along with music pieces in an orchestra group
• Live pitch analysis
• Precise feedback on your intonation
• Detailed evaluation and trend analysis after every practice session
• Track your progress over time and view targeted statistics of your practice success

Ideal for daily practice.

WHO IS MELLOWD FOR?

• Beginners
• Music students
• Returning players
• Teachers to support lessons

Perfect for structured practice at home or during lessons.

MORE FEATURES

INTERACTIVE FRETBOARD

Learn the positions of all notes on the fretboard and play simple melodies virtually on your smartphone.

PRECISE TUNER

Tune your string instrument with an adjustable reference frequency and tolerance range.

METRONOME

Practice scales rhythmically with confidence—from slow to fast.

WHY MELLOWD IS DIFFERENT

mellowD is and will remain ad-free.
Many apps only offer a tuner or a metronome.
mellowD goes further: you actively train your intonation based on real music pieces and etudes—with measurable progress.

MULTILINGUAL
German, English, Italian, Spanish, and French.

mellowD was developed by an active musician—built by practice, for practice.

Make your intonation measurable.
Train with purpose.
Play more cleanly.
Always ad-free.
Train your intonation with live feedback and progress analysis
Updated on
Oct 29, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    App activity and App info and performance
  • No data collected
    Learn more about how developers declare collection
  • Data is encrypted in transit
  • Data can’t be deleted
  • Committed to follow the Play Families Policy

What’s new

New in this veersion:
PRO subscription enabled
Content rating
Everyone
Learn more

App support

About the developer
Kai Lehmann
lekatech.berlin@gmail.com
Winterfeldtstraße 31 10781 Berlin Germany