StackStats

StackStats is a desktop analytics app for Substack writers. Connect your Substack in one click and it pulls everything in: KPIs, 30-day growth, a 180-day subscriber forecast, growth sources, churn-risk readers, superfans, readers likely to upgrade to paid, best time to post, and per-post performance. Everything is computed locally on your computer, with no servers and no account. Optional AI insights run fully offline via Ollama or with your own API key (Claude, GPT-4, Gemini, Groq, OpenRouter). Pricing: one-time, $39 (1 year) or $79 lifetime. Free live demo at https://demo.stackstats.app. Not affiliated with Substack Inc.