Nosce
Privacy
Privacy Policy
The short version: Nosce is built to keep most data on your device. There are no analytics SDKs, no advertising, no third-party trackers, and nothing is ever sold or shared with data brokers. The only feature that syncs pact data off your device is optional Shared Pacts, which uses Nosce's server so two people can keep one agreement together.
1. What stays on your device
Nearly everything Nosce knows about you lives only on your iPhone, in the app's local database. This includes your Notices and Pacts, your habits, tasks and focus slots, your streaks and completion history, your earned-reprieve balance, and your settings.
Your app selections (the apps a Notice or Pact watches) are stored as Apple's opaque Screen Time tokens. Because of how iOS works, Nosce cannot see the names of the apps you choose, your usage numbers, or your activity — only iOS evaluates those, on your device, and tells the app when a threshold is crossed.
2. Screen Time & notifications permissions
Nosce asks for two iOS permissions:
- Screen Time (Family Controls). Used on-device to measure usage against the thresholds and limits you set, and to show shields for Pacts. Apple's opaque app-selection tokens never leave your phone. If you use Shared Pacts, only the pact-specific results and estimates listed in Section 4 are sent to Nosce's server.
- Notifications. Used to deliver local Notice taps and reminders, and to tell a Shared Pact member when their friend suspends a Pact. Shared Pact suspension alerts are sent through Apple's Push Notification service.
You can revoke either permission at any time in the iOS Settings app.
3. Weekly Reflection (on your device)
The weekly Reflection feature writes its short summary entirely on your device, from data already stored there — aggregate counts and timings such as how many notices fired and at what hours, and which habits held. Nothing is sent off your device to generate it, and it never contains the names of the apps you watch, the contents of any message, or anything iOS does not permit the app to see.
4. Shared Pacts (optional, uses Nosce's server)
A Shared Pact is an optional feature where you and one other person commit to limits together. It works through Nosce's server at trynosce.com, hosted on Cloudflare Pages Functions with a Cloudflare D1 database. If you never create or join a Shared Pact, this server sync is not used.
What Nosce stores for a Shared Pact:
- Pact setup: pact ID, title, state, and start date.
- Invite setup: an unguessable invite code and invite URL.
- Member setup: display names, chosen avatar, role, local member ID, hashed member secret, timezone, join status, and fixed Shared Pact sharing mode.
- Shared pact details: the chosen app label/nickname and daily cap for each person.
- Daily results: the date, kept/missed/paused/unverified status, cap minutes, report time, and whether monitoring was active.
- Suspension events: a random event ID, suspension and resume times, and the duration option selected, used to notify the other Shared Pact member.
- Pact minutes used for that Shared Pact.
- Estimated all-apps screen time for the day, if measured on your device.
- An app installation ID and Apple Push Notification service device token, used only to deliver Shared Pact alerts to that installation.
What Nosce does not store for Shared Pacts:
- No Apple ID, phone number, contacts, or iCloud account.
- No Apple's opaque Screen Time app tokens.
- No full list of apps on your phone.
- No exact Apple Screen Time report or per-app all-day history.
- No message contents, browsing contents, or notification contents.
Your phone decides locally whether your side was kept or missed, then sends the Shared Pact result, chosen app label, daily cap, Pact minutes, estimated all-apps screen time, and your Shared Pact display profile. This sharing is part of Shared Pacts, so invite only someone you want to share those pact-specific details with. Anyone with a valid invite link can preview the Shared Pact invite before joining, so treat invite links as private and send them only to the person you want to invite.
Nosce uses a local member ID and member secret to sync each person's side of a Shared Pact. The member secret is stored on your device and sent to Nosce's server only in Shared Pact request headers; Nosce stores a hash of that secret in its database. Nosce sends Shared Pact suspension alerts through Apple's Push Notification service and stores the destination token only for that delivery. Cloudflare may process standard technical request data, such as IP address, request time, and user agent, to provide hosting, security, and reliability for the server.
5. Subscriptions
If Nosce offers a paid subscription, purchases are processed by Apple via the App Store (StoreKit). Nosce receives your subscription status from Apple to unlock features; it never sees or stores your payment details. Manage or cancel a subscription in iOS Settings → your name → Subscriptions.
6. What Nosce does not do
- No third-party analytics or crash-tracking SDKs.
- No advertising and no ad identifiers.
- No selling, renting, or sharing of personal data with data brokers.
- No account or sign-up is required to use the core app.
7. Deleting your data
Because most on-device data is stored only in the app, deleting Nosce from your iPhone removes it. For Shared Pacts, deleting or leaving the pact in the app updates the server so the pact is no longer active. To request removal of Shared Pact server data, email us and we'll help.
8. Children
Nosce is intended for the person installing it on their own device. It is not a parental-control product and is not directed at children under 13.
9. Changes
If this policy changes in a way that affects how your data is handled, we'll update the date at the top of this page.
10. Contact
Questions about privacy? Email [email protected].