Privacy Policy

Last updated: June 19, 2026

This Privacy Policy explains how FlatDiag ("FlatDiag," "we," "us," or "our") handles information in connection with the FlatDiag mobile application (the "App") and the website at flatdiag.com (the "Site"). FlatDiag is operated by Nicholas Gorkes (sole proprietor), based in Colorado, USA. FlatDiag is built to be private by design: the App has no networking and never sends your data anywhere.

The headline: Everything the App does with your car — VINs, fault codes, live data, and coding backups — happens entirely on your iPhone. There is no account, no analytics SDK, and no server. Nothing leaves your device unless you choose to export or share it.

1.The short version

Your car's data stays with you. VINs, fault codes, live data, and coding values/backups are stored locally on your iPhone. We never receive, transmit, or store them.
No account. You don't sign in or give us your name to use the App.
No analytics, no tracking, no networking in the App. The App contains no advertising or analytics SDKs and makes no network connections other than the local Bluetooth/Wi-Fi link to your OBD-II adapter.
Optional on-device diagnostics. You can turn on crash/diagnostic logging to help you troubleshoot. It's off by default, stays on your device, and you can export or delete it anytime.
We don't sell your personal information.

2.Your vehicle data stays on your device

When you connect through a Bluetooth (or Wi-Fi) OBD-II adapter, the App communicates directly between your iPhone and your car. VINs, diagnostic trouble codes, live sensor values, control-unit (coding) values, and the automatic backups the App creates before a coding change are all stored locally on your device, in the app's private storage (excluded from iCloud backup). We do not receive, transmit, or store this information. Deleting the App removes it.

3.Optional on-device diagnostics

To help you troubleshoot, the App includes an optional diagnostics feature that can keep technical logs (and, separately, crash/hang reports) about the App's own operation. This feature is:

Off by default and opt-in — it only runs if you turn it on after a clear consent prompt, and turning it off stops collection immediately;
Stored only on your device — these logs never leave your iPhone and are never sent to us or anyone else;
VIN-redacted — your VIN is removed from anything stored, unless you deliberately include it in an export;
Fully under your control — you can view, export, and permanently delete this data at any time from within the App.

Because this data never leaves your device, we do not collect or have access to it.

4.Information you provide

If you join our waitlist or email us (for example, at nick@flatdiag.com), we receive the email address and any message you send. We use it only to respond and, if you asked for them, to send you FlatDiag updates. You can ask us to delete it anytime.

5.Website & purchases

Website

The Site is hosted on Cloudflare. As with most websites, our hosting provider automatically logs basic technical data (such as IP address, browser type, and pages requested) for security, abuse prevention, and performance. We do not run advertising or analytics trackers on the Site. The Site loads a web font from Google Fonts to render type; your browser's request to that service is subject to Google's policies.

Purchases

The App is sold as a one-time purchase through the Apple App Store. Apple processes all payments — we never receive your payment card or billing details. Apple may provide us with limited, aggregated sales and download statistics.

6.How we use information

To operate, maintain, and improve the App and Site;
To respond to your inquiries and provide support — using only what you choose to send us (such as an email or a diagnostics file you export);
To send you updates you have requested, which you can opt out of at any time;
To protect against security issues, abuse, or fraud, and to comply with legal obligations.

We do not sell your personal information. Because the App collects nothing, there is nothing from the App to share. For the limited website/contact data described above, we share only:

Service providers (Site only). Our website host (Cloudflare) and, if you contact us or join the waitlist, our email provider (Google Workspace) — who process that limited data on our behalf.
Apple. In connection with App Store distribution and purchases, as described above.
Legal & safety. When required by law, or to protect the rights, safety, or property of FlatDiag, our users, or others.
Business transfers. In connection with a merger, acquisition, or sale of assets, subject to this policy.

8.Affiliate links & third parties

The Site and App may contain links to third-party products and websites, including affiliate links to OBD-II adapters (such as the OBDLink CX). If you click an affiliate link and make a purchase, we may earn a commission at no additional cost to you. Those third-party sites and merchants have their own privacy policies, and we are not responsible for their practices. See our Disclaimers & Disclosures.

9.Data retention

On-device vehicle data and diagnostic logs remain on your device until you delete them or uninstall the App — we never receive them. Waitlist/contact emails are kept until you ask us to remove them or they are no longer needed for the purpose you contacted us about.

10.Security

Because your data stays on your device, its security depends largely on the security of your iPhone (passcode, Face ID/Touch ID, OS updates). We take reasonable measures to protect the limited information we do handle (such as contact emails). No method of storage or transmission is 100% secure, and we cannot guarantee absolute security.

11.Your privacy rights

Depending on where you live, you may have rights over your personal information — to access, correct, delete, or port it, and to opt out of certain processing. This includes residents of the EU/UK (GDPR), California (CCPA/CPRA), Colorado (CPA), and other US states with comprehensive privacy laws.

Most data lives on your device — you can view, export, and delete it directly in the App, or remove everything by uninstalling.
For waitlist/contact emails, email nick@flatdiag.com and we will honor applicable requests.
We will not discriminate against you for exercising your rights. We do not "sell" or "share" personal information for cross-context behavioral advertising.

12.Children

FlatDiag is not directed to children and is intended for users 18 and older. We do not knowingly collect personal information from children under 13 (or the equivalent minimum age in your jurisdiction). If you believe a child has provided us information, contact us and we will delete it.

13.International users

FlatDiag is operated from the United States. Because the App does not transmit data, there is no international transfer of App data. If you contact us or join the waitlist from outside the US, the limited information you send (such as your email) may be processed in the US, which may have different data-protection laws than your country. Where required, we rely on appropriate safeguards for such processing.

14.Changes to this policy

We may update this Privacy Policy from time to time. When we do, we will revise the "Last updated" date above and, for material changes (for example, if we ever add a feature that sends data off your device), provide a more prominent notice. Your continued use of FlatDiag after changes take effect means you accept the update.

15.Contact us

Questions about this policy or your data? Email nick@flatdiag.com.