Documentation
Linc documentation
Everything you need to know about Linc — what it is, how it works, and how your data is protected.
Last updated: February 2026
What is Linc?
Linc is a private iOS relationship reminder. You log interactions with people you care about, set a reminder interval for each person, and Linc notifies you when it's been longer than that interval since you last connected.
Unlike social media or messaging apps, Linc is entirely private. You decide who's in your list, when you've connected with them, and how frequently you want reminders. The app never reads your messages or social feeds. You can optionally grant contacts access to quickly add people from your address book.
How Linc works
1. Add your people
Start by adding the friends, family members, or colleagues you want to stay in touch with. You can add people manually or grant Linc access to your contacts to quickly pull in names and photos from your address book.
2. Set a reminder interval
For each person, you choose how often you want to connect — weekly, biweekly, monthly, quarterly, or a custom number of days. This interval is personal: you might check in with your best friend weekly and a former colleague quarterly.
3. Log interactions
Whenever you connect with someone — a call, a coffee, a text exchange that felt meaningful — you log it in Linc. The app records the date and updates your interaction history. This is how Linc tracks when you last connected.
4. Receive smart reminders
When your chosen interval passes since the last logged interaction, Linc sends a notification. The notification is your cue to reach out — a text, a call, or planning to meet up. Once you've connected, log the interaction to reset the clock.
5. Review your relationship health
Linc's home screen gives you an at-a-glance view of who needs attention. People overdue for contact appear at the top. You can see when you last connected and how long it's been, helping you prioritize who to reach out to first.
Privacy model
Linc is built on a privacy-first architecture. By default, your friend list, interaction logs, reminder settings, and notes are stored on your device. You can also opt into account sync for cross-device continuity, which means sync data is handled by that account layer rather than staying local-only.
What Linc does NOT do
- Send local-only data to Linc or BitLark servers
- Read your messages or call history
- Connect to any social media platform
- Transmit your local-only data to any third-party server
- Require an account or login for local use
What Linc DOES do
- Store data on-device by default
- Offer optional account sync for cross-device continuity
- Work completely offline
- Send local push notifications only
- Keep local-only data private on your device
- Respect your notification preferences
Linc requires no account creation for local use. Your data is yours — if you delete the app, local data is removed from your device. If you opt into sync, synced data persists through the account-backed sync layer. Without sync, data lives only on the device running Linc.
Free vs. Premium
Linc is free to download and use with core features. Linc Premium unlocks advanced capabilities for power users who want to maintain a larger network or access deeper insights.
Free
- Add up to 6 friends
- Custom reminder intervals
- Interaction logging
- Push notifications
Premium
- Unlimited friends
- Advanced interaction notes
- Relationship health insights
- Priority support