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
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What's New in Lock Tess
1.3
July 10, 2026
A monstrous update! - 38 new sounds added, including real NASA space audio and two spooky new categories (Horror and Halloween), bringing the total library to over 70 sounds - Free tier expanded to 10 sounds (up from 2) and all library sounds can be previewed, so there's even more to try before unlocking Premium - Multi-select for your imported sounds - select several at once to delete, share, favourite, or re-categorise in one go - Smoother, more reliable iCloud sync across your devices - Bug fixes and polish
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In-App Purchases
$2.99
Lock Tess Premium
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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.