Friend Leaderboard Privacy

Most social habit trackers assume that sharing progress means sharing everything — friends see your habit list, your notes, sometimes even your logs. That's a reasonable default for some things and a genuinely bad one for others. The friend leaderboard is built around a narrower, deliberately private slice of your data: friends can see your current chain length, your best chain, and a shape of your activity over the week — enough to cheer you on, compete a little, and notice if you've gone quiet. What they never see is which habit those numbers belong to. A seven-day chain on the leaderboard could be meditation, could be a graduate-school application, could be quitting smoking, could be managing a health condition you've never mentioned to anyone — and your friends have no way to know which. That distinction matters because accountability and exposure aren't the same thing. Wanting a friend to notice you're keeping up a habit is normal and motivating; wanting that friend to know exactly what the habit is can be a genuine vulnerability, especially for habits tied to health, recovery, or things people would rather work on quietly. The leaderboard is designed to give you the first without forcing the second — competition and encouragement without a broadcast of what you're actually working on.