For Chrome, Edge, Brave, and Chromium-based browsers

Your practice room,
docked in the browser.

Metronome, tuner, timer, stopwatch, library, notes, and video practice controls in one tidy side panel — right next to whatever you're learning. Less setup, more playing.

Add Tempo Kit — FreeSee it in action
Free core toolsOne side panelLocal-first tools
Tempo Kit
Tempo Kit
6-in-1 side panel
MetronomeChromatic TunerTimer & StopwatchYouTube PracticeBilibili PracticeAudio/Video PracticeLocal FilesA–B LoopsPitch TransposeSpeed ControlBPM DetectionPreset LibraryPractice NotesMetronomeChromatic TunerTimer & StopwatchYouTube PracticeBilibili PracticeAudio/Video PracticeLocal FilesA–B LoopsPitch TransposeSpeed ControlBPM DetectionPreset LibraryPractice Notes

Built for the way

musicians actually practice

Every practice tool in the side panel. Keep playing. Keep focused.

Tempo Kit chromatic tuner
Tempo Kit metronome
Metronome + TunerFREE

Keep steady time.
Stay in tune.

A full metronome — 30 to 600 BPM, tap tempo, subdivisions, swing — plus a real-time chromatic tuner that reads your mic and shows note, cents, and Hz. Audio is processed on your device.

  • Tap tempo, swing feel, per-beat volume
  • Note, octave, cents & Hz readout
  • Mic audio processed locally — never recorded
Tempo Kit YouTube practice controls
Video PracticePRO

Slow it down.
Loop it. Nail it.

Works on YouTube and Bilibili out of the box. Slow down a passage, transpose the pitch, mark an A–B loop, and run BPM detection from the tab — all from the side panel.

  • Speed 0.1×–3×, pitch ±12 semitones
  • A–B loop markers and BPM detection
  • YouTube, Bilibili, and your own files
Tempo Kit practice library presets
Tempo Kit practice notes popup
Practice Library + NotesFREEPRO

Save your setup.
Pick up where you left off.

Save any combination — tempo, video, speed, pitch, loop, notes — as a named preset. Pin note to different tabs to keep track and analyze what you are practicing. Reload in one click. Export the whole library as a backup.

  • 3 presets free · 300+ with Pro + folders
  • Pinned practice notes per preset
  • Export & import as a backup file

Features

All tools, free and Pro, at a glance.

Metronome
Tap Tempo
Different Sounds
Chromatic Tuner
Preset Library
Save / Load Preset
Pinned Notes
Import / Export
Video Practice
Speed Control
Pitch Transpose
A–B Loop
BPM Detection
Local Files
Stopwatch + Laps
Mini Tools
Countdown Timer
Multiple Languages
Light & Dark Theme
Privacy-First

Free to start. Unlock video tools and library space.

Start with the metronome, tuner, timer, and stopwatch. Upgrade to Pro for video practice controls and the full practice library.

Free
$0no account
Add free
Pro
Monthly
$4.99
 
Most popular
Yearly
$38.99
~35% off
Best value
Lifetime
$129.99
Pay Once
Get Pro
Metronome (BPM, tap tempo, subdivisions)
Chromatic tuner
Timer & stopwatch
Mini control drawers
Metronome
Metronome + Videos
Saved presets
3 presets
300+ presets

FAQ

Frequently asked questions

Full setup help and docs also available on the Support page.

Is Tempo Kit really free?
Yes. The metronome, chromatic tuner, countdown timer, and stopwatch are free core tools — no account needed. Pro unlocks video practice tools (speed, pitch, A-B loop, BPM detection) for YouTube, Bilibili, your own files, and sites you connect, plus 300+ saved presets and folder organization. Practice notes and one-click library export/import work on every plan too.
What can I practice with?
Video practice works with YouTube and Bilibili out of the box — they are the tested, supported sources. You can also practice with your own audio or video files in the Practice Player, or connect another standard web player when the site allows browser extension control. Use one connected video at a time.
When does Pro activate after I buy it?
Tempo Kit checks your ExtensionPay status when the extension opens and when you return from checkout. If Pro does not appear immediately, close and reopen the extension. If it still shows as free, open Settings and choose Restore Pro. ExtensionPay will ask for the purchase email on its own secure page.
Does Tempo Kit record my audio?
No. The tuner uses your microphone for real-time pitch detection only — audio is processed locally in your browser and never recorded, stored, or sent anywhere. BPM detection captures tab audio temporarily for analysis and also never records or uploads anything. Local files in the Practice Player are played entirely on your device and never uploaded.
What is the refund policy?
You may cancel your subscription at any time. Cancellation stops future renewals, but Pro access continues until the end of your current billing period. We generally do not provide prorated refunds for unused subscription time, but may issue refunds for duplicate charges, billing errors, or serious technical problems at our discretion. View our full Cancellation & Refunds Policy.
How do I cancel a subscription?
Open Tempo Kit → Settings → Manage Subscription. This opens the subscription management page (powered by Stripe) where you can cancel. After cancellation, Pro access continues until the end of your paid billing period.

Still have questions?

Visit the Support & Docs page

Ready to practice without
switching apps?

Start with the free core tools. Add Pro when you need video controls and more presets.

Add Tempo Kit — FreeSupport & Docs