PRIVACY
POLICY

Information We Collect

Information you provide directly

• Name and email address when you submit a support request through the Site.

Information collected automatically by the App

• Location data. HowFast uses your device's GPS to detect the start of a run, measure speed, and calculate elapsed time. Location data is processed on-device and is not transmitted to our servers.
• Vehicle and performance data. Vehicle profiles, ET predictions, and run history you enter or that the App records are stored locally on your device.
• OBD-II data. If you connect an OBD-II adapter, the App reads vehicle data (RPM, speed, throttle position, gear) in real time via Bluetooth. This data is processed on-device and is not transmitted to our servers.
• External GPS data. If you connect a RaceBox or Qstarz GPS device, speed and timing data from that device is processed on-device and is not transmitted to our servers.
• Crash and diagnostic data. If the App crashes, Firebase Crashlytics automatically records technical information including the crash log, device model, operating system version, and app version. This data is transmitted to Google and is not linked to your personal identity.
• DynoLog cloud sync data. If you sign into a DynoLog account within HowFast and enable cloud sync, your run data (ET, trap speed, 60-foot time, atmospheric conditions, and run timestamp) is transmitted to Supabase infrastructure shared with the DynoLog app. This feature is optional and off by default. Deep link and file export to DynoLog do not transmit any data to servers — those transfers happen entirely on-device.

Information collected automatically by the Site

• Standard web server logs including IP address, browser type, and pages visited, retained briefly for security and diagnostic purposes.

How We Use Your Information

• To respond to support requests you submit.
• To operate and improve the App's on-device features.
• To diagnose technical issues when you report them.
• To identify and fix App crashes and stability issues via Firebase Crashlytics.
• To serve advertisements to users who have not purchased HowFast Pro (see Section 3).
• To transmit your run data to DynoLog via Supabase, if you have enabled cloud sync (see Section 4).

We do not sell your personal data to third parties.

Advertising

The free version of HowFast displays advertisements served by Google AdMob, a service provided by Google LLC. AdMob may collect and use certain information from your device to serve personalized or non-personalized ads, including:

• Device identifiers (such as IDFA on iOS, subject to your App Tracking Transparency settings)
• Approximate location
• App usage data and interactions with ads

On iOS, AdMob will request your permission via Apple's App Tracking Transparency (ATT) prompt before collecting your advertising identifier. You may choose to allow or deny this tracking at any time in your device's Settings → Privacy & Security → Tracking.

Google's data practices are governed by Google's Privacy Policy, available at policies.google.com/privacy. You can review Google's advertising controls at adssettings.google.com.

HowFast Pro users do not see ads. Upgrading to Pro removes all advertising from the App.

Third-Party Services

• Google AdMob — advertising in the free version of the App. Privacy policy: policies.google.com/privacy
• Firebase Crashlytics — crash reporting and stability monitoring, provided by Google LLC. When the App crashes, Crashlytics automatically collects the crash log, device model, operating system version, and app version. This data is not linked to your identity and is used solely to identify and fix bugs. Privacy policy: firebase.google.com/support/privacy
• Supabase, Inc. — cloud database used to deliver run data to the DynoLog app when cloud sync is enabled. Run data transmitted via Supabase is stored on AWS infrastructure and is subject to Supabase's privacy policy: supabase.com/privacy. This service is only active if you sign into a DynoLog account within HowFast and enable cloud sync.
• Apple Inc. — Sign in with Apple, used for DynoLog account authentication within HowFast when cloud sync is enabled. Privacy policy: apple.com/legal/privacy
• Google LLC — Sign in with Google, used for DynoLog account authentication within HowFast on Android when cloud sync is enabled. Privacy policy: policies.google.com/privacy
• Formspree, Inc. — delivery of support form submissions to our inbox. Privacy policy: formspree.io/legal/privacy-policy
• Google Fonts — typography on the Site. Privacy policy: policies.google.com/privacy

The App does not integrate any third-party analytics frameworks, social media SDKs, or data brokers beyond those listed above.

Data Storage & Security

All performance data, run history, and vehicle profiles are stored locally on your device. We do not operate servers that collect or retain this data.

If you sign into a DynoLog account within HowFast and enable cloud sync, run data is additionally transmitted to and stored on Supabase infrastructure operated by DtimesTwo Technologies LLC. In this case, the DynoLog Privacy Policy (available at dynolog.com/privacy.html) also governs how that data is handled. Cloud sync is optional and off by default — the three HowFast export options (deep link, file, and cloud sync) are described in the App.

We take reasonable steps to protect personal information you submit to us, but no method of transmission over the internet is completely secure.

DynoLog Integration

HowFast supports three methods of transferring run data to DynoLog, a companion app also published by DtimesTwo Technologies LLC:

• Deep link (on-device): Tapping "Export to DynoLog" sends your run data directly to the DynoLog app on your device via a URL scheme. No data touches our servers.
• File export (on-device): Exporting a .dynolog file sends run data to DynoLog via your device's file system or share sheet. No data touches our servers.
• Cloud sync (optional, server-side): If you sign into a DynoLog account within HowFast, HowFast can upload run data to Supabase so it appears in DynoLog automatically. This requires you to authenticate with Apple or Google and explicitly enable sync. Run data uploaded via this path is stored in Supabase and governed by the DynoLog Privacy Policy at dynolog.com/privacy.html.

The deep link and file export methods do not require an account and do not transmit any data to servers. Cloud sync is always opt-in and can be disabled at any time in HowFast Settings.

Children's Privacy

HowFast is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you believe a child has submitted information to us, please contact us and we will delete it promptly.

Your Rights

You may request deletion of any personal information you have submitted to us (such as a support request) by contacting us at the address below. Since run data is stored only on your device (unless you have enabled cloud sync), you can delete it at any time from within the App or by uninstalling the App.

If you signed in to enable DynoLog cloud sync, an account was created for you. You can permanently delete that account and all associated cloud data at any time directly in the app — open Settings → DynoLog Cloud Sync → Delete Account — or by following the steps at howfast.app/delete. Because HowFast and DynoLog share one account, deleting it also removes any DynoLog data tied to the same Apple or Google login.

You may opt out of personalized advertising at any time through your device's ATT settings or through Google's advertising controls linked in Section 3.

Changes to This Policy

We may update this policy from time to time. When we do, we will update the "Last updated" date at the top of this page. Continued use of the App or Site after changes are posted constitutes acceptance of the updated policy.

Contact

Questions or requests regarding this Privacy Policy may be directed to: