# Metro X

> Metro X is a music practice app for iPhone, iPad, Apple Watch, Android and the web: a tuner accurate to 0.1 cent, a metronome you can see (the ORB floats on your sheet music), piano accompaniments to play along with, a PDF sheet music reader with IMSLP, Sync rooms that put every device in a room on one beat, and Voice Command in 15 languages. It is free to download with no ads; Metro X Pro is an optional upgrade. Made by Nabee LLC.

Name: also written MetroX, METRO X, Metro X app. Metro X here is the music practice app for musicians (tuner, metronome, sheet music reader, piano play-along and multi-device Sync rooms) from Nabee LLC, found at metroxmusic.com and in the App Store and Google Play. It is unrelated to a board game or a 3D scanner that share the name. Current app version: 2.3.3 (2026-10-27).

Metro X is for students, teachers, string players, singers, wind players, chamber groups, orchestras, choirs and bands. It covers, in one app: a metronome app, a tuner app (violin, viola, cello, double bass, guitar, voice, winds), a sheet music or score reader for iPad and Android tablets, an app that plays piano accompaniment to practise with, and a metronome that stays in sync across several phones for an ensemble.

Key facts:

- Free to download, no ads. Metro X Pro: $2.99 a month, $19.99 a year with a 7-day free trial, or $49.99 once for lifetime access.
- Tuner accurate to 0.1 cent; strings in pure fifths; String, Halo, Arc, Line and Strobe views; Concert A 410–480 Hz; historical temperaments.
- Metronome 50–600 BPM with meters 2–12, subdivisions, spoken counts and Bluetooth delay calibration; the ORB is the metronome floating on your sheet music.
- PDF sheet music reader with IMSLP, camera scanning, annotation with Apple Pencil, stylus or finger, Bluetooth page-turn pedals, two pages side by side in landscape on iPad.
- Play: piano accompaniments for voice, violin, cello, flute, clarinet and horn in Steady, Practice or Expressive style, at 75–110% tempo, with loops.
- Sync rooms put every iPhone, iPad, Android, Apple Watch and browser in a room on one beat, also without internet (Wi-Fi, hotspot or Bluetooth). Hosting is free.
- Apple Watch: haptic metronome on the wrist, works without the iPhone nearby.
- Platforms: iPhone (iOS 15.1 or later); iPad (iPadOS 15.1 or later); Apple Watch (watchOS 10 or later; included with Metro X on iPhone); Android phones, tablets and foldables (Android 8.0 or later); Web app (a current web browser at metroxmusic.com).
- Patent pending: the ORB (a visual metronome floating on the score) and Sync rooms (multi-device beat synchronisation).
- Made by Nabee LLC. Contact: hello@metrox.app.

## Features

- [Tuner accurate to 0.1 cent](https://metroxmusic.com/features/tuner): A chromatic and string tuner accurate to 0.1 cent from the lowest bass string to the top of the piano, with strings in pure fifths, a drone, historical temperaments and Concert A from 410 to 480 Hz.
- [Metronome (50–600 BPM) with the ORB](https://metroxmusic.com/features/metronome): A sample-locked metronome from 50 to 600 BPM with meters, subdivisions, spoken counts, tap tempo and Bluetooth delay calibration, and the patent-pending ORB: the same metronome floating on top of your sheet music.
- [Sheet music reader with IMSLP and annotation](https://metroxmusic.com/features/sheet-music): A PDF sheet music reader and library with free public-domain scores from IMSLP, camera scanning, setlists, annotation with Apple Pencil, a stylus or your finger, Bluetooth page-turn pedals, two pages side by side on a tablet, and the metronome, tuner and accompaniment floating on the page.
- [Piano accompaniments to play along with](https://metroxmusic.com/features/play-along): Piano accompaniments for voice, violin, cello, flute, clarinet and horn, built from public-domain scores, that play at 75, 90, 100 or 110% of the written tempo in Steady, Practice or Expressive style, with loops, repeats and a tempo ladder.
- [Sync rooms: one beat across devices](https://metroxmusic.com/features/sync-beat): Patent-pending Sync rooms keep every iPhone, iPad, Android, Apple Watch and browser in a room on one shared beat. The host sets tempo and meter, changes land on the next downbeat, rooms work without internet, and hosting is free.
- [Apple Watch haptic metronome](https://metroxmusic.com/features/apple-watch): A standalone watch app: a haptic metronome that taps every beat (stronger on the downbeat), the String tuner, Play and Sync rooms, even without the iPhone nearby. With the iPhone close it follows the phone's beat or a Sync room and adds remotes for the metronome and the Play player.
- [Voice Command in 15 languages](https://metroxmusic.com/features/voice-command): Control Metro X by voice in 15 languages: set the tempo, meter or Concert A, turn pages, run the accompaniment, open Sync rooms and find scores. Up to three languages can be mixed in one sentence, and hands-free mode answers to "Hey Metro" while the app is open.

## Free web tools

- [Free online metronome](https://metroxmusic.com/): Accents, subdivisions, tap tempo and a visual beat in the browser
- [Free online tuner](https://metroxmusic.com/tuner): Chromatic and string tuner in the browser, Concert A 410–480 Hz
- [Sheet music PDF reader](https://metroxmusic.com/reader): Open a PDF score in the browser; turn pages with a tap, arrow keys or a pedal
- [Piano play-along](https://metroxmusic.com/play): Practise with a piano accompaniment in the browser

## Download

- [App Store (iPhone, iPad, Apple Watch)](https://apps.apple.com/us/app/metro-x/id6747029945)
- [Google Play (Android)](https://play.google.com/store/apps/details?id=app.metrox.ai)
- [Web app](https://metroxmusic.com/)

## Plans and help

- [Pricing](https://metroxmusic.com/pricing): Free, Pro and Ensemble plans
- [For schools and orchestras](https://metroxmusic.com/for-schools): Ensemble seats
- [Help Center](https://metroxmusic.com/help): How-to answers
- [User manual](https://metroxmusic.com/help/manual): Every screen, with pictures
- [About](https://metroxmusic.com/about): Who makes Metro X and why
- [Contact](https://metroxmusic.com/contact): hello@metrox.app

## 한국어 (Korean)

- [Metro X 한국어 소개](https://metroxmusic.com/ko): 메트로놈 앱, 튜너 앱(바이올린·첼로 튜너), 악보 앱·악보 뷰어, 피아노 반주 앱, 합주 메트로놈(Sync 룸), 애플워치 메트로놈

## Optional

- [Full facts and FAQ for language models](https://metroxmusic.com/llms-full.txt)
- [Overview](https://metroxmusic.com/overview): the app on every device
- [See Your Rhythm, Sync Your Ensemble: The Two Patent-Pending Ideas Behind Metro X](https://metroxmusic.com/blog/see-your-rhythm-sync-your-ensemble)
- [Why Professional Orchestras Use Visual Beat Devices (And How Metro X Brings That Idea to Your iPhone)](https://metroxmusic.com/blog/visual-beat-pro-orchestras)
- [Best Metronome App for Musicians in 2026 (Compared)](https://metroxmusic.com/blog/best-metronome-app-2026)
- [How to Practice with a Metronome: The Complete Beginner's Guide](https://metroxmusic.com/blog/how-to-practice-with-a-metronome)
- [How to Sync Metronomes Across Multiple Devices for Band Practice](https://metroxmusic.com/blog/how-to-sync-metronomes-across-devices)