~/logbook/privacy

Privacy Policy

Last updated: 27 July 2026 · Applies to: Logbook · Pilot Flight Log for iPhone, iPad and Apple Watch

The short version

Logbook has no user accounts, no server and no analytics. The developer collects no personal data of any kind and cannot see your flight records. Everything you enter stays on your own device and, if you enable it, in your own private iCloud. There is nothing to opt out of, because nothing is being gathered.

## 1. Who this policy is from

Logbook · Pilot Flight Log is developed and published by Kunyu Cui, an independent developer ("we", "us"). This policy explains what happens to information when you use the app. It is written to be read, not to be survived — if anything here is unclear, get in touch.

## 2. What we collect

Nothing. The app has no sign-up, no login, no user profile on our side, and no telemetry. We do not collect, receive, store, sell, rent or share:

your name, email address, phone number or licence details;
your flight records, aircraft, airports, times, or any logbook content;
your location, contacts, photos, calendar or health data;
device identifiers, advertising identifiers (IDFA), or usage analytics;
crash reports containing your data.

This is not a policy choice that could quietly change tomorrow — the app ships with no backend to send data to and no third-party SDK capable of sending it.

## 3. Where your data actually lives

Data	Stored where	Who can read it
Flights, aircraft, pilot profile	Locally on your device	You only
The same data, if iCloud sync is on	Your own private iCloud database (Apple CloudKit)	You only — tied to your Apple Account
PDF / CSV files you export	Wherever you choose to save or send them	Whoever you send them to
Purchase receipt for the Pro unlock	Handled by Apple, on your Apple Account	Apple and you

## 4. iCloud sync

If you are signed in to iCloud and have iCloud Drive enabled, Logbook keeps your records in sync across your own Apple devices using Apple's CloudKit private database. Records in a private database are stored under your Apple Account. The developer has no access to that database — we cannot read, export or recover your flights, and no administrative back door exists.

That storage is governed by Apple's Privacy Policy. If you prefer no cloud copy at all, turn iCloud off for Logbook in Settings → Apple Account → iCloud; the app continues to work fully offline with local storage only.

## 5. Purchases

The one-time Pro unlock is sold through Apple's In-App Purchase. Payment details are entered on Apple's screens and are never seen by the app or by us. We receive only aggregated, anonymised sales reports from App Store Connect — units and revenue by territory, with no personal information and no way to identify who bought what.

## 6. What the app does not do

No advertising and no ad networks.
No analytics or attribution SDKs — no Firebase, no Facebook SDK, no crash-analytics vendor.
No tracking across apps or websites, so the App Tracking Transparency prompt is never shown, because there is nothing to ask for.
No data brokers. Your data is not a product; the app is.
No network calls for content. The airport database ships inside the app, so it works with the phone in airplane mode.

## 7. Files you export

When you export a PDF or CSV, the file is generated on your device and handed to the iOS share sheet. From that moment it is an ordinary file under your control: where it goes, and who receives it, is entirely your decision. We are not involved in and have no visibility into that transfer.

## 8. Children

Logbook is a professional record-keeping tool intended for adults and is not directed at children under 13. Since the app collects no data at all, it collects no data from children either.

## 9. Your rights (GDPR, UK GDPR, CCPA)

Data-protection law gives you rights of access, correction, deletion, portability and objection over personal data held about you. In our case those rights have an unusually simple answer: we hold no personal data about you, so there is nothing for us to disclose, correct, delete or transfer, and no personal information has ever been sold or shared.

Your data portability is handled inside the app instead: CSV export is free and unrestricted, in every version, so you can take your complete records elsewhere at any time without asking anyone's permission.

## 10. Deleting your data

On the device: delete the app; its local database goes with it.
In iCloud: go to Settings → Apple Account → iCloud → Manage Account Storage, select Logbook, and delete its data.

⚠ Before you delete

Your logbook is a career record and deletion is permanent — we keep no copy and cannot restore anything for you. Export a CSV first.

## 11. Changes to this policy

If the app ever gains a feature that changes any of the above, this page will be updated before that version ships, and the "last updated" date at the top will change. Material changes will also be noted in the App Store release notes. Because the app has no account system, we have no way to email you — this page is the record.

## 12. Contact

Questions about this policy, or about anything the app does with data: pilogbook@163.com. Replies are from a human, usually within a few days.