Support

REVOX uses your device's GPS to detect your real-time driving speed and plays engine sounds that match your acceleration and deceleration. Simply select an engine sound pack, tap play, and drive. The sound automatically adjusts to your speed.

No. REVOX uses GPS solely to calculate your speed in real time. Your location data is processed entirely on your device and is never stored, recorded, or transmitted. The app plays sounds only -- it does not access your microphone or record any audio.

Yes. REVOX includes a companion Apple Watch app that lets you control engine sound playback directly from your wrist. You can start/stop sounds, switch engine packs, and adjust volume without touching your iPhone.

For the best experience, we recommend connecting your device to your car's audio system via Bluetooth or AUX cable. This allows the engine sounds to play through your car's speakers for a more immersive experience. You can also use the app with your device's built-in speakers or external Bluetooth speakers.

REVOX includes 50+ engine sound packs covering a variety of engine types: sports cars, supercars, muscle cars, classic cars, and more. Free users can access a selection of sounds. Pro subscribers unlock the full library.

The engine sounds in REVOX are original recordings and synthesized audio created by our team. They are designed to replicate various engine characteristics for entertainment purposes and are not affiliated with any specific automobile manufacturer.

Open the app and navigate to the subscription section. Choose either the Annual plan ($29.99/year) or Monthly plan ($4.99/month). Payment is processed securely through the Apple App Store using your Apple ID.

To cancel your subscription: Open Settings on your iPhone, tap your Apple ID at the top, tap Subscriptions, find REVOX, and tap Cancel Subscription. You will continue to have Pro access until the end of your current billing period.

All subscriptions are managed by Apple. To request a refund, visit reportaproblem.apple.com, sign in with your Apple ID, find your REVOX purchase, and submit a refund request.

Yes. Once engine sound packs are downloaded, REVOX works fully offline. GPS speed detection and audio playback do not require an internet connection.

Make sure Location Services are enabled for REVOX (Settings > Privacy & Security > Location Services > REVOX > set to "While Using the App"). The app needs GPS access to detect your speed. If the issue persists, try restarting the app or ensuring you have a clear GPS signal (not inside a tunnel or parking garage).

To delete your account and all associated data, go to the Settings page within the app and tap "Delete Account." You can also request account deletion by emailing support@viclab.ai. Please cancel any active subscriptions before deleting your account.