Daybook App
Privacy Policy
Last updated: 7 August 2026 · Published by Cortex Solution
The short version
Stays on your device
Every record, receipt photo and figure. There is no account and no server to send them to.
One network request
An exchange-rate lookup you trigger by hand. It sends two currency codes and nothing else.
We never collect
No name, email, location or ad identifiers. No analytics, no crash reporter, no advertising SDK.
What is stored, and where
| Data | Where it lives | Leaves the device? |
|---|---|---|
| Transactions, budgets, accounts, reminders, people, splits | SQLite database in the app's own container | No |
| Receipt photos | The app's Documents directory | No |
| Text read off receipts | Stored with the record | No |
| Settings (currency, theme, thresholds, lock state) | iOS user defaults | No |
| Home Screen widget summary | Shared app group container, on device | No |
| Exports and backups | Created on request, handed to the iOS share sheet | Only if you send them |
There is no account, no login, no server, no cloud sync, no analytics SDK, no crash reporter, no advertising SDK and no tracking. The app cannot be signed into.
Daybook collects no personal information. Nothing about your money ever leaves your device.
Your money stays on your device
Daybook has no account, no server and no analytics. Your records, budgets, reminders, receipt photos and the text read off them are stored in the app's own storage on your iPhone and nowhere else.
We do not receive this information, and we have no way to obtain it. There is nothing to sign up for, nothing to log in to, and no copy of your data anywhere but on your device. Deleting the app deletes all of it.
What we collect
Nothing. Daybook does not collect, transmit, store or process any personal information about you. We hold no user accounts, no email addresses and no records of any kind.
Camera and photos
The camera is used only at the moment you start a scan. A photo from your library is read only when you pick one yourself.
The image is copied into the app's own storage so the record keeps its receipt. It is never uploaded, and no copy is sent anywhere.
Reading receipts
When you scan a receipt, the text is extracted on your device using Apple's built-in VisionKit and Vision text recognition, which run locally on the iPhone.
No image and no extracted text is ever sent to us or to any third party to be read.
Face ID, Touch ID and your passcode
If you turn on the app lock, iOS performs the check. Daybook is told only whether it succeeded. It never sees, receives or stores your face, your fingerprint or your passcode.
Notifications
Reminders for bills, subscriptions and credit-card payments are scheduled locally by iOS on your device. Nothing about a bill, its amount or its due date is sent off the device in order to deliver a notification.
Looking up an exchange rate
This is the only time Daybook uses the internet, and it never happens on its own.
When you tap to look up a currency conversion rate, the app requests that rate from api.frankfurter.app, which publishes European Central Bank reference rates.
The request carries the two currency codes and nothing else — no account, no amount, no device identifier, and nothing that identifies you or your spending. It happens only when you ask for it, and the rate is used only if you confirm it. You can always type a rate in by hand instead and never make the request at all.
As with any internet request, the operator of that service may see the network address it came from, in the ordinary course of running a web server. We receive nothing from it.
Exports and backups
A CSV export, a spreadsheet, a PDF statement or a backup file is created only when you ask for one. It is then handed to the iOS share sheet and goes wherever you choose to send it — email, Files, iCloud Drive, a messaging app.
From the moment it leaves the app, that file is covered by whatever service you sent it to, not by this policy. We never see it.
No tracking, no advertising
Daybook does not track you across apps or websites. It contains no advertising, no analytics, no crash reporting and no third-party SDKs that collect data. We do not sell, rent or share anything with anyone, because we have nothing to sell, rent or share.
This website
The statements above are about the Daybook app. This website is a separate thing, and it is only fair to say what it does: like the rest of cortexbizsolution.com, these pages use Google Analytics to count visits. That is a property of the website you are reading, not of the app — nothing on this site has any connection to the records inside Daybook, and installing the app involves no website at all.
See the Cortex Solution website privacy policy for what the site collects.
Purchases
Daybook Pro is bought through Apple's In-App Purchase system. Apple handles the entire transaction. We never see your payment details, your name, your billing address or your Apple Account. The app is told only whether an active purchase exists on the device.
Apple's own privacy policy governs that transaction: apple.com/legal/privacy
Children
Daybook is not directed at children and collects no personal information from anyone, of any age.
Your rights
Because we hold no data about you, there is nothing for us to disclose, correct, export or delete on your behalf — and no request you could make that would produce anything.
You retain complete control of your own data at all times: export it as CSV or JSON whenever you like, back it all up to a file, or erase everything from Settings. Deleting the app removes every record from your device permanently.
Changes to this policy
If this policy changes, the updated version will be published at this address and the date at the top will change with it. Material changes will also be noted in the app's release notes.
Contact
Questions about privacy, or about this policy:
© 2026 Cortex Solution · DaybookTerms of UseSupportBack to Daybook