Privacy

Keep the Diff collects nothing about you. Not a reduced amount, not an anonymised amount. Nothing.

Most apps that say this mean they collect a little and treat it carefully. This one has no analytics, no accounts, and no telemetry of any kind. Nothing you log — no amount, no label, no goal, no photo — is ever sent anywhere.

The app talks to the internet in exactly one situation, and only because you asked it to: unlocking Premium on a Mac or a PC, described under Unlocking Premium on a computer below. That request carries a short code and a receipt number from the store you bought through. It carries nothing about you and nothing you have logged.

What the app stores

Everything you log — the amounts, the labels you write, your categories, your goals and their photos — is written to a file in the app's own private storage on the device you logged it on. It is not uploaded, mirrored, or backed up to us, because there is no "us" for it to go to.

If your device backs itself up through iCloud, Google, or Windows, that file is included in that backup, the same as any other app's data. That backup belongs to you and your device maker, and is governed by their terms, not ours. We cannot see inside it.

What we do not do

• No account. There is nothing to sign up for and no password to create.
• No bank connection. The app never asks for banking credentials and cannot read your transactions. You type two numbers; that is the entire input.
• No analytics. No usage tracking, no crash reporting SDK, no session recording, no heat maps.
• No advertising and no advertising identifiers. Nothing in the app is sold, shared, or brokered, because nothing is collected to sell.
• No third-party SDKs that phone home.
• No location, contacts, microphone, or camera roll access beyond the single photo you choose yourself for a goal, which stays on the device.

Purchases

Premium is sold through the App Store, Google Play, and the Microsoft Store. When you buy, that store handles the payment and tells the app one thing: whether this device is entitled to Premium. We never see your card, your billing address, or your name.

What those stores collect while processing a purchase is covered by Apple, Google, and Microsoft's own policies.

Unlocking Premium on a computer

One subscription covers every device you use, but the Mac and Windows downloads from this site have no store of their own to ask. So the phone or tablet that holds your subscription is what proves it: the computer shows a short code, you type that code into the app on your phone, and your phone sends us two things — the code, and the opaque receipt number the App Store or Google Play issued for your subscription.

We hand that receipt number straight back to Apple or Google to ask one question: is this subscription still active? We store the receipt number and a random token for the computer, so the computer can ask again later and lose Premium if the subscription ends. That is the whole record. There is no email address, no name, no password, no payment detail, and nothing you have logged in the app — none of which is needed to answer that one question.

You never have to use this. If you only use the app on a phone or tablet, it never makes a network request at all.

Children

The app is not directed at children and collects no information from anyone, including children.

Your rights

Rules like the GDPR and the CCPA give you the right to see, correct, export, and delete the personal information a company holds about you. We hold none, so there is nothing for us to show you or delete.

Your own copy is yours to manage directly: Premium can export your full history as a CSV file, and deleting the app removes its data from that device.

Changes

If this policy ever changes, the date at the top changes with it. If a future version of the app ever collects anything — for example if optional cross-device sync is built — that will be described here plainly and will be something you turn on, never something already on.

Contact

Questions about this policy: hello@littlebirdtrading.com

Keep the Diff is made by Little Bird Trading LLC.