Free Tools


Musician's tools that run right here in the browser — free, no ads, no nasty telemetry, no sign-up. Each one installs as an app and works offline.

Bass Tuner

Hears your instrument through the microphone — built for bass, with guitar, ukulele, banjo, mandolin, the violin family and a full chromatic mode. Plucked reference notes and a drone included, and everything is analysed on your device: sound never leaves it.

Open the Tuner

Metronome

A wooden metronome with a real swinging pendulum — every tempo from 30 to 260 BPM, tap tempo, accented beats, and a rhythm trainer that alternates played and silent bars to test your inner clock.

Open the Metronome

Groove Trainer

A drum machine built for bass practice — rock, funk, swing, bossa, One Drop and four-on-the-floor on a 16-step grid you can edit as it plays. Silence any drum to lock in with what's left, and let the rhythm trainer drop out whole bars to test your inner clock.

Open the Groove Trainer

Take them with you


All three tools install as real apps — their own icon, full screen, no browser around them — and once installed they work with no signal at all. There's no app store in between: you install straight from the tool's own page. Here's the route on each kind of device.

On your desktop

Chrome, Edge, Brave & other Chromium browsers
  1. Open any of the tools in a Chromium browser — Chrome, Edge and Brave all do this.
  2. Press Install on the tool's page, or the small install icon at the right-hand end of the address bar.
  3. The tool opens in its own window, with its own icon in your dock or taskbar — and works offline from then on.

On Android

Phones & tablets
  1. Open the tool in Chrome (or Samsung Internet, Edge — most Android browsers).
  2. Tap Install on the tool's page, or the browser menu , then “Add to Home screen”.
  3. A real app icon lands on your home screen — the tool opens full screen and works with no signal at all.

On Mac, iPad & iPhone

In Safari
  1. Open the tool in Safari.
  2. On iPhone, tap the Share button at the bottom of the screen — top right on iPad — then “Add to Home Screen”.
  3. On a Mac, it's File → Add to Dock. Either way, the tool behaves like any other app, connection or not.

These tools were developed by Hardy Hemmingway — lifelong music enthusiast, and the developer of this site. Hardy is passionate about privacy, which is why the apps are built the way they are — no ads, no nasty telemetry, no sign-up — and why they're free.

In tune and in time? Now the playing

The tools cover the mechanics — the 26 free lessons cover the music: theory, technique and walking bass from Pete, plus printable practice charts to keep by the amp.