Great Update
Latest update addressed nearly all of my suggestions. The developer was very helpful and responsive!
Free
In-App Purchases
About
Enhance your car's lock sound with a variety of monstrous and satisfying audio options. Test with free sounds, then unlock a vast library and import your own custom audio files. Organize, share, and sync your sounds across all your devices with a single, one-time purchase.
✓Over 30 built-in sound effects
✓Import custom audio files (MP3, WAV, M4A, AIFF, FLAC)
✓Sound trimming and selection
✓Organize sounds with search, categories, and favorites
✓iCloud Sync across iPhone, iPad, and Mac
✓One-time purchase, no subscription
Show original description
What's New in Lock Tess
2.0
August 9, 2026
Lock Tess 2.0 is the biggest update yet: a completely new look, your own voice as a lock sound, and a real waveform trimmer. RECORD YOUR OWN VOICE Record straight into Lock Tess, watch the level as you go, and play it back before you keep it. Say anything you like and hear it every time you walk away from your car. A WHOLE NEW LOOK Every screen rebuilt from scratch. Darker, sharper, and easier to read at a glance. REAL WAVEFORM TRIMMER See the actual shape of your sound and drag along it to pick exactly the moment you want, instead of guessing where the good bit starts. BETTER SOUND FROM YOUR CAR Your car's lock speaker sits outdoors competing with traffic, so quiet sounds used to disappear in a car park. Every sound is now levelled to a consistent loudness, and the whole built-in library has been re-levelled to match. Plus trimmed edges get a gentle fade, so wherever you cut your sound there's no hard stop. MORE RELIABLE ICLOUD SYNC A full pass over syncing closed some bugs, so your library now travels between devices dependably. ALSO FIXED Recently Deleted now displays correctly on Mac A rare crash when importing or deleting sounds Clearer iCloud status messages in Settings Thank you to everyone who sent feedback. Questions or ideas? support@locktess.com
More1
In-App Purchases
$2.99
Lock Tess Premium
Unlock the full Lock Tess experience
User reviews
FAQ
Does Lock Tess have ads?
No, Lock Tess is ad-free. The app offers a free trial with two sounds, and a one-time purchase unlocks all premium features without advertisements.
How much does Lock Tess cost?
Lock Tess is free to try with two sounds. The full experience, including over 30 sounds, unlimited imports, and iCloud sync, is available with a single one-time purchase.
What cars are compatible with Lock Tess?
Lock Tess is compatible with most Tesla cars equipped with the Boombox feature and Pedestrian Warning System speaker, typically from 2019 onwards. If your car has Boombox in the Toybox menu, it should work.
Can I import my own sounds into Lock Tess?
Yes, Lock Tess allows you to import your own sounds in MP3, WAV, M4A, AIFF, and FLAC formats. The app automatically converts and renames them to the correct format for your car.
How often is Lock Tess updated?
The latest version of Lock Tess is 1.2, last updated on May 23, 2026. Updates typically include new features, bug fixes, and sound library expansions.
What devices does Lock Tess support?
Lock Tess is available on iPhone, iPad, and Mac. A single unlock provides access across all your Apple devices, with iCloud Sync keeping your sounds consistent.
What makes Lock Tess's sound library unique?
The sound library features over 30 hand-picked sounds ranging from funny to satisfying, including air horns, retro bleeps, dramatic stings, and animal sounds, all designed to enhance your car's lock sound.
Is there a subscription for Lock Tess?
No, Lock Tess is committed to a one-time purchase model. There are no monthly fees or subscriptions, ever, ensuring all features are yours permanently after the initial unlock.