StackStats
The analytics Substack should have given you.
StackStats launched on March 24, 2026 with 3 votes, #3,303 of 23,380 launches that month and more than 50% of that year's launches.
What it does
A desktop app for Substack writers that takes the data Substack already has on you and turns it into a full analytics dashboard. Engagement segments that show who's active, fading, or gone. Cohort retention by join month. Churn risk scores. Superfan detection. Best day and hour to post. Growth forecasting. Posts worth resending. Everything runs locally on your Mac or PC. No cloud, no account, your data never leaves your machine. Built by a Substack writer who uses it on his own newsletter!
Advanced analytics for Substack writers. Runs 100% locally, no cloud, no subscription. Discover your superfans, churn risk, and cohort retention.
KPIs, 30-day growth, 180-day forecast, latest post performance — all at a glance. Which sources actually convert — and which posts drove real subscribers. Engagement segments, conversion potential scoring, churn risk scores, power users. Best day and hour to post, optimal send times based on when readers actually open, top growth posts. Cohort retention, open rate decay, engagement funnel, top readers scored 0–100, email client breakdown. Page views, follower vs. email growth, audience by country and US state, which regions engage best. Growth analysis, 30-day action plan, and a chat window that knows your data. KPIs, 30-day growth, 180-day forecast, latest post…from stackstats.app
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