Lock Tess

Lock Tess lets you customise your car's lock sound in seconds — no computer needed.

Simply pick a sound from our built-in library or import your own, connect your USB drive to your iPhone, iPad or Mac, and tap Use. Lock Tess handles all the technical stuff automatically, creating the correctly named file your car needs. Plug the USB back into your glovebox USB port, enable USB as the sound in Boombox settings, and enjoy your new lock sound every time you walk away from your car.

--- SOUND LIBRARY ---
Over 30 hand-picked sounds ranging from funny to satisfying. Air horns, retro bleeps, dramatic stings, animal sounds and more.

--- IMPORT ANY SOUND ---
Found the perfect sound online? Import it directly into Lock Tess. We accept MP3, WAV, M4A, AIFF and FLAC files, automatically cropping, compressing, converting, and renaming to the exact format your car needs.

--- WORKS ON ALL YOUR DEVICES ---
Lock Tess works beautifully on iPhone, iPad and Mac. Unlock once and use everywhere — no additional purchases and no subscriptions.

--- NO SUBSCRIPTION EVER ---
Lock Tess is free to try with the two included sounds. Then unlock the full experience with a single one-time payment. No monthly fees, no adverts, no surprises.

--- HOW IT WORKS ---
1. Pick a sound from the library or import your own
2. Connect your USB drive via an adapter
3. Tap Use — Lock Tess creates the LockChime.wav automatically
4. Save to the USB, then plug back into the glovebox USB port
5. Enable in Toybox > Boombox > Lock Sound > USB
6. Enjoy your new lock sound!

--- COMPATIBLE CARS ---
Works with cars equipped with the Boombox feature and Pedestrian Warning System (PWS) speaker. Before you purchase there are 2 free sounds to test the full process.

--- FREE vs PREMIUM ---
Free: 2 built-in sounds to try the experience
Premium: Full library of sounds, unlimited custom imports, one-time purchase unlocks for all your devices

Questions? Contact us at support@locktess.com