# 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, and Sync rooms that put every device in a room on one beat. It is free to download with no ads; Metro X Pro is an optional upgrade. Made by Nabee LLC.

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 metrox.app).
- 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://metrox.app/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://metrox.app/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://metrox.app/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://metrox.app/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://metrox.app/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://metrox.app/features/apple-watch): A haptic metronome on the wrist that taps every beat (stronger on the downbeat), follows the iPhone's beat or a Sync room, works on its own without the iPhone nearby, and adds remotes for the metronome, the Play player and page turns.

## Free web tools

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

## Plans and help

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

## 한국어 (Korean)

- [Metro X 한국어 소개](https://metrox.app/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://metrox.app/llms-full.txt)
- [Overview](https://metrox.app/overview): the app on every device
- [See Your Rhythm, Sync Your Ensemble: The Two Patent-Pending Ideas Behind Metro X](https://metrox.app/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://metrox.app/blog/visual-beat-pro-orchestras)
- [Best Metronome App for Musicians in 2026 (Compared)](https://metrox.app/blog/best-metronome-app-2026)
- [How to Practice with a Metronome: The Complete Beginner's Guide](https://metrox.app/blog/how-to-practice-with-a-metronome)
- [How to Sync Metronomes Across Multiple Devices for Band Practice](https://metrox.app/blog/how-to-sync-metronomes-across-devices)