Privacy

Last updated 7 November 2026

Your notebooks

Your notebooks are stored on your device and, if you use iCloud, in your private iCloud account. We can't read them, and we don't run a server that holds them.

Find

Searching for a word happens entirely on your device.

Read aloud

Your phone reads your pages out itself. They aren't sent anywhere for this.

AI search

This is on Unlimited only, and every search there uses it. Finding the closest pages happens on your device where possible. To write an answer, your search and up to five excerpts from those pages, without crossed-out text, are sent through our relay to OpenRouter and on to the model provider. If your device's language model isn't available, your search alone is also sent, to suggest words to look for. The relay doesn't store any of this, and it asks OpenRouter to use only providers that agree not to train on it or store it beyond processing it to reply (data_collection: deny).

Clean copies

This is on Unlimited only, for finished notebooks, and only when you tap Clean Copy (AI). The notebook's pages, including text you've crossed out and pictures of your drawings, are sent through our relay to OpenRouter and on to the model provider, which writes the clean copy. The relay doesn't store any of this, and it asks OpenRouter to use only providers that agree not to train on it or store it beyond processing it to reply (data_collection: deny).

Usage

To understand how 48 is used and make it better, the app sends us pseudonymous usage events: things like opening the app, starting a notebook, filling a page (a count of characters, not the words), searching (whether anything was found, not what you searched for) and visiting the Store. Each install has a random ID made on your device, which is also attached to your purchases. With the events we receive your app version, OS version, device model, language setting, plan, and the country your connection comes from. We don't store your IP address. We never send anything you've written, notebook titles included, and none of it is linked to your name or Apple ID. Events are deleted after 180 days. You can turn it off at any time in Menu, Privacy, Share Anonymous Usage.

Purchases

Purchases are handled by Apple, and we never see your payment details. Apple tells our server about each purchase, renewal and refund: the product, price, currency, country and date. The app attaches its random install ID to purchases so we can see what's bought in the app. If you used someone's link or offer code, we record that the purchase came through them, so we can pay them their share.

Subscription check

The relay checks Apple's signed record of your subscription before using AI. It keeps a daily usage count against the subscription's transaction ID, and nothing else.

Contact

To ask about or delete your data, email support@fourtyeight.app. In the app, Menu, Privacy, Copy Usage ID gives the random ID your usage is filed under, which lets us find it.

This website

This website uses no cookies or tracking. If you follow someone's link to 48, we count the click, with the country and the website you came from, so we can credit them. The site is hosted on Cloudflare, which handles standard request details, such as IP addresses, to deliver and protect it.