Jigsaw Diary (https://jigsawdiary.com) is a free web app to log the physical jigsaw puzzles you own, build and finish, with a small community where people applaud each other's finished puzzles. A couple dozen people have signed up, mostly from Reddit. The pattern is always the same: they add two boxes and don't come back. So this month I worked only on reasons to return: - a home page that shows what happened since your last visit, built from the same data as the weekly email, so the email never promises something the app doesn't show - a monthly streak with one free month a year. No daily streaks, no "you're about to lose it" notifications - a page per puzzle that groups everyone who has the same box (brand + title + piece count), so people can find each other - an invite reward that only unlocks when your friend finishes their first puzzle, not when they sign up - a winter challenge: finish puzzles from 3 different brands, any size, no leaderboard Stack: Next.js, Supabase (Postgres with row-level security doing most of the privacy work), Vercel, web push, 7 languages. Free, no ads, hobby project. Two questions: Which of these would actually bring you back to an app like this, and which is noise? For hobby apps, have you seen something that worked better than email or push to get people back?   submitted by   /u/giganteroja [link]   [comments]