Terms of Service

Last updated: 24 September 2026

1. Agreement

These Terms of Service (“Terms”) are an agreement between you and Best Day Labs, LLC (“we”, “us”) governing your use of the RevLine iOS application and anything we provide with it (together, “the App”). By downloading, installing or using the App you accept these Terms. If you do not accept them, do not use the App.

You must be at least 13 years old, and old enough to form a binding contract where you live, to use the App. If you are using it in a moving vehicle you must hold a valid driver’s licence or be a passenger.

2. Safety — please read

RevLine displays information on a phone in a car. That carries obvious risk, and the following are conditions of using it:

• Set it up before you move. Choose your dashboard, sound and settings while parked. Do not do it while driving.
• Mount your phone properly. Use a secure mount that does not obstruct your view of the road, block an airbag, or breach the law where you are. Never hold the phone while driving.
• Do not let the App distract you. Your attention belongs on the road. Glancing at the App must never take priority over driving safely.
• Obey the law. Follow all speed limits, traffic laws and local rules about mounting and using phones in vehicles. Nothing in the App is an invitation to exceed a speed limit or to drive in a way that is unsafe or unlawful. Any performance figure the App records is for your own interest on private land or a closed course, and never an encouragement to break the law on a public road.
• The App is not an instrument. Speed, acceleration, engine speed, temperature, pressure and every other figure it shows are estimates derived from your phone’s sensors or from an OBD2 adapter. They may be inaccurate, delayed or unavailable. Never rely on them for any decision affecting safety, and never in place of your vehicle’s own instruments or a professional diagnosis.
• OBD2 adapters. Any adapter you use is a third-party product we neither make nor supply. Plugging a device into your vehicle’s diagnostic port is done at your own risk and may affect your vehicle or its warranty. Follow the adapter manufacturer’s instructions, and do not fit or adjust one while driving.
• Sound. The App can play engine sounds. Keep the volume low enough to hear emergency vehicles, horns, and what your own car is doing.

You are solely responsible for operating your vehicle safely and lawfully at all times.

3. Licence

We grant you a personal, limited, non-exclusive, non-transferable, revocable licence to use the App on Apple-branded devices you own or control, as permitted by the App Store Terms of Service and these Terms. We keep all rights we do not expressly grant.

4. What you may not do

• Copy, modify, translate or create derivative works of the App.
• Reverse engineer, decompile or disassemble the App, or attempt to derive its source code, except to the extent that applicable law expressly permits it despite this restriction.
• Rent, lease, lend, sell, sublicense, distribute or otherwise transfer the App or your rights under these Terms.
• Remove or obscure any copyright, trademark or other proprietary notice.
• Extract, redistribute or make any independent use of the App’s audio recordings, artwork, dashboard designs or other assets.
• Use the App for any unlawful purpose, or in a way that interferes with anyone’s safety.

5. Subscriptions and payment

Parts of the App require a paid subscription. The following applies to every subscription bought inside the App:

• Subscriptions are sold and processed by Apple through In-App Purchase. Payment is charged to your Apple Account at confirmation of purchase.
• Subscriptions renew automatically. Unless cancelled at least 24 hours before the end of the current period, your subscription renews automatically and your Apple Account is charged the renewal price within 24 hours before the end of that period.
• You can manage or cancel a subscription at any time in iOS Settings → your name → Subscriptions. Cancelling stops the next renewal; it does not refund the period already paid for. Deleting the App does not cancel a subscription.
• Prices are shown in the App before you buy and may vary by region. We may change prices for future periods; where the law requires it, we will give you notice and the chance to cancel before a changed price takes effect.
• Any free trial or introductory offer, if one is available, ends automatically and converts to a paid subscription unless you cancel at least 24 hours before it ends. Where Apple’s rules apply, any unused part of a free trial is forfeited if you buy a subscription during the trial.
• Refunds are handled by Apple, not by us, under Apple’s policies. Requests go through Apple’s support site. We have no ability to issue a refund for an App Store purchase.

Your purchase is also governed by Apple’s Licensed Application End User License Agreement.

6. Your content and your data

Drives, routes, vehicle details, custom layouts and settings created in the App are yours and are stored on your device. We do not receive them. You are responsible for backing up your device if you want to keep them; we cannot recover data from a lost, reset or damaged device, or after the App is deleted. How the App handles information is described in the Privacy Policy, which forms part of these Terms.

7. Intellectual property and trademarks

The App, its code, designs, artwork and audio are owned by Best Day Labs, LLC or its licensors and are protected by copyright and other laws.

RevLine is an independent product. It is not affiliated with, endorsed by, sponsored by or connected to any vehicle manufacturer. Manufacturer names, model names and related marks are the property of their respective owners, and are used only descriptively — to identify the vehicles that engine recordings were made from, or the era and style a dashboard design takes inspiration from. No dashboard in the App reproduces a manufacturer’s logo or artwork.

8. Third-party services and links

The App links to third-party products, including hardware sold on Amazon. We do not control those sites or products and are not responsible for them. We may earn a commission on purchases made through those links, at no additional cost to you. Any purchase you make is between you and that seller, under their terms.

9. Availability and changes

We may change, suspend or discontinue the App or any of its features at any time. We may release updates, and some features may require a current version of iOS or particular hardware. We are not obliged to provide support, updates or continued availability of any feature.

10. Disclaimer of warranties

To the fullest extent permitted by law, the App is provided “as is” and “as available”, without warranty of any kind, express or implied, including any implied warranty of merchantability, fitness for a particular purpose, accuracy, quiet enjoyment or non-infringement.

We do not warrant that the App will be uninterrupted, error-free, or that any reading, measurement or figure it displays will be accurate, complete, timely or suitable for any purpose. Some jurisdictions do not allow the exclusion of implied warranties, so parts of this section may not apply to you, and you may have other rights that vary by jurisdiction.

11. Limitation of liability

To the fullest extent permitted by law, neither Best Day Labs, LLC nor its members, officers or contractors will be liable for any indirect, incidental, special, consequential, exemplary or punitive damages, or for any loss of profits, revenue, data, goodwill, or for personal injury, property damage, vehicle damage, traffic citations, or any other loss arising out of or connected with your use of or inability to use the App, whether based in contract, tort, negligence, strict liability or any other theory, and even if we have been advised of the possibility of such damages.

To the fullest extent permitted by law, our total aggregate liability for all claims relating to the App is limited to the greater of the amount you paid us for the App in the twelve months before the claim arose, or twenty-five United States dollars (US$25).

Some jurisdictions do not allow the limitation or exclusion of liability for incidental or consequential damages, or for death or personal injury caused by negligence, so some of the above may not apply to you. Nothing in these Terms excludes or limits liability that cannot lawfully be excluded or limited.

12. Indemnity

You agree to indemnify and hold harmless Best Day Labs, LLC and its members, officers and contractors from any claim, demand, loss, liability or expense, including reasonable legal fees, arising out of your use of the App, your violation of these Terms, your violation of any law or traffic regulation, or your operation of a vehicle.

13. Termination

These Terms apply until terminated. They terminate automatically if you fail to comply with them. We may suspend or end your access to the App at any time. You may terminate at any time by deleting the App. Sections 6 through 15 survive termination.

14. Apple

These Terms are between you and Best Day Labs, LLC only, and not with Apple Inc. Apple is not responsible for the App or its content. Apple has no obligation to furnish any maintenance or support for the App. If the App fails to conform to any applicable warranty, you may notify Apple, and Apple may refund the purchase price; to the maximum extent permitted by law, Apple has no other warranty obligation with respect to the App. Apple is not responsible for addressing any claim by you or a third party relating to the App, including product liability, failure to conform to a legal requirement, or consumer protection claims. Apple is not responsible for investigating, defending, settling or discharging any third-party intellectual property infringement claim relating to the App. Apple and its subsidiaries are third-party beneficiaries of these Terms and, upon your acceptance, will have the right to enforce them against you.

15. Governing law and disputes

These Terms are governed by the laws of the State of Alabama, USA, without regard to its conflict-of-law rules. You and we agree to the exclusive jurisdiction of the state and federal courts located in Alabama for any dispute not subject to another agreed process. If you are a consumer resident in a jurisdiction whose law entitles you to the protection of your local courts or mandatory consumer law, nothing here deprives you of that protection.

Before filing any claim, you agree to try to resolve it informally by writing to support@bestdaylabs.com and allowing 30 days for a response.

16. General

If any provision of these Terms is found unenforceable, it will be limited or removed to the minimum extent necessary and the rest will remain in effect. Our failure to enforce a provision is not a waiver of it. You may not assign these Terms; we may assign them in connection with a merger, acquisition or sale of assets. These Terms, together with the Privacy Policy, are the entire agreement between you and us about the App.

17. Changes to these Terms

We may update these Terms. The current version is always at this address with its date at the top. Material changes will be signalled in the App or on this page. Continuing to use the App after a change means you accept the updated Terms.

Contact

support@bestdaylabs.com
Best Day Labs, LLC, United States.