Privacy policy

Your locations stay on your iPhone. Dayproven has no account, no server and no tracking.

Last updated 9 November 2026.

Who we are

Dayproven is made by Greyledger, the trading name of Angus Taylor, a sole trader in the United Kingdom, who is the controller of any personal data described here. Contact: [email protected].

What the app does with your data

• Location. With your permission, Dayproven takes location readings using iOS's low-power location services (significant location changes and visits, plus a reading when you open the app and during background refresh). Each reading is stored only on your iPhone, in the app's own storage. The state or country is worked out on the phone from map outlines built into the app; Dayproven does not use an online lookup service for this.
• What you enter. Stays, answers, tags and settings you enter are stored on your iPhone in the same way.
• Nothing is sent to us. Dayproven has no server and no account. It contains no analytics, advertising or tracking code, and we never receive your locations or anything else you enter.
• Exports and backups. When you export a PDF or CSV, or make a backup, the file is created on your iPhone and goes only where you choose to share or save it (for example by email, AirDrop or Files). What happens to it then is governed by the service you send it through.
• iCloud and device backups. If your iPhone backs up to iCloud or a computer, iOS may include the app's data in that backup, under Apple's terms.
• Purchases. The one-time purchase is handled by Apple through the App Store. We do not receive your payment details; Apple gives the app the product's price and tells it whether the purchase is active or has been refunded.

If you email us

If you write to [email protected], we receive your email address and what you send, and use them only to reply. We keep the correspondence for as long as needed to deal with your request and for our records, and delete it on request where the law allows. Our email is hosted by service providers acting on our instructions.

Your choices and rights

• You can change location access at any time in the iPhone's Settings. With "While Using", iOS lets Dayproven take readings only while it is open; with access off, Dayproven takes no readings. Days without a record are shown as unknown.
• Deleting the app deletes everything it stored on the phone (other than copies in your own backups or files you exported).
• Under UK data protection law you have rights to access, correct and erase personal data we hold, and to complain to the Information Commissioner's Office (ico.org.uk). The only personal data we can hold about you is email you send us.

Children

Dayproven is not directed at children.

Changes

If this policy changes, the new version will be posted here with its date.