Privacy Policy

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 the only copies that leave it are the backups described below.

We do not receive any of this, and we have no way to obtain it. There is nothing to sign up for and nothing to log in to. Deleting the app deletes everything it holds on the phone.

Backup copies are written to your own iCloud Drive, and this is on to begin with, because the automatic backups the app keeps on the phone sit inside the app and would be destroyed along with it. A safety net that cannot survive the thing it exists for is not one. Switch it off under Settings › Data and nothing is copied anywhere. You can also save a file yourself through the share sheet. Either way those go to your own iCloud account or wherever you send them — never to us. There is no Daybook server for them to go to.

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.

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 stays there unless you press the button that asks an AI provider to read it — described under Reading a hard receipt below. Nothing uploads a photo on its own.

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.

On iPhones with Apple Intelligence, Daybook can read a receipt with Apple's on-device model. This happens on your phone; the receipt is not sent anywhere, and no key or account is needed.

No image and no extracted text is sent to us, ever. There are two cases in which a receipt can go to a third party — one sending the photograph, one sending only text — and neither is possible until you add an API key of your own. Both are described next.

Receipt text is read on this device and stays here. What follows are the only two exceptions, and they differ in what is sent.

When you press “Read the photo with AI” on the screen after a scan, the receipt photograph itself is sent to be read, along with the names of your expense categories and any category notes you wrote — nothing else. It is the photo you already took; the app never takes a new one for this. It happens only on the press, only to that receipt, and never on its own.

If you also switch on the automatic second reading, then when a scan comes back unclear the words, numbers and their positions from that receipt — not the photograph — are sent without asking, along with the names of your expense categories and any category notes you wrote. That switch is off until you turn it on, and turning it off stops it. Removing your key stops both.

Where it goes. The request goes to Google, under your own Gemini key. Google’s terms govern what happens to it once it arrives, not ours.

Tell Daybook turns what you type, and a photo you attach, into records for you to check. Nothing is saved until you press Save, and the conversation is not kept.

On the phone. On an iPhone with Apple Intelligence, your message and the words read off an attached photo are read by Apple's on-device model, and nothing leaves the phone. With no AI of its own and no key, simple messages are read on the phone by Daybook's own rules.

With your own Gemini key, when your iPhone has no Apple Intelligence or you chose Gemini, pressing Send sends what you typed to Google under your key, along with the names of your expense categories, the names of the people you split bills with, and any category notes you wrote. If you attached a photo or a PDF — or shared one into Daybook from another app — the words and numbers read off it on the phone go too: for a screenshot of a bank app or a bank statement, that is whatever it shows, which can include balances and account details. The file itself is not sent, and nothing from your saved records is: payments already in Daybook are found on the phone.

Asking about your spending. A question such as “How much did I spend on food last month?” is answered on your phone from your records. With your own Gemini key, only the question and the names of your categories and accounts are sent to Google, never an amount or a record.

Sharing into Daybook. “Share › Daybook” copies what you shared into Daybook's own storage on your phone and opens Tell Daybook to read it. A PDF locked with a password is opened with the password you type, which is used once and never saved. Shared files are deleted from Daybook unless you keep one as a receipt.

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.

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.

Once a day Daybook asks whether a newer version of it is out, so it can tell you. On iPhone it asks Apple's App Store, sending only Daybook's own App Store ID and your App Store country and language; on Android, Google Play checks on the phone. Nothing about you or your records is sent, and Daybook has no server of its own to send it to. Turn it off in Settings, under About.

When a conversion rate is needed, the app requests it from api.frankfurter.app, which publishes European Central Bank reference rates.

When you tap to look up an exchange rate, Daybook asks that service for the rate for that pair. Only the two currency codes are sent, with the date when the rate is for a past record — no amount, no account, nothing about you.

A rate is looked up on its own only if you switch on “Look up exchange rates automatically” in Settings, which asks you first. Then it is the rate for each record's day, and once a day for accounts you hold in another currency. That switch is off until you turn it on, and turning it off stops it. You can always type the rate yourself 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.

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.

Copying backups to iCloud Drive is on to begin with, for the reason given at the top of this policy: a backup that lives inside the app cannot survive the app being deleted. Each automatic backup is copied into your own iCloud account, where only you can read it and Apple's terms apply. Turning it off under Settings › Data stops new copies; the ones already there are yours to keep or delete. We receive nothing either way, and we cannot read what is in your iCloud.

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.

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.

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

Daybook is not directed at children and collects no personal information from anyone, of any age.

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.

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.

Questions about privacy, or about this policy: