NoteStack — Substack Notes Analytics

Tracking since May 12, 2026.

Changelog

• May 31, 2026
  description

  Stop guessing which Notes work. NoteStack shows you exactly which Substack Notes drive subscribers, engagement, and growth — right in your browser toolbar.
  
  ✨ FEATURES
  
  📊 Dashboard — All your Notes ranked by engagement in one clean view. See likes, restacks, comments, and subscribers gained per Note at a glance.
  
  🔍 Spy Mode — Analyze any public Substack profile. Enter a username and see their top Notes, best content types, posting patterns, and key takeaways. Study what works in your niche.
  
  🗓️ Best Time Heatmap — A 7x18 grid showing which day and hour combinations drive the most engagement. Know exactly when to post for maximum reach.
  
  🧬 Note DNA — Automatically categorizes your Notes (Questions, Personal Stories, List/Tips, Link Shares, Short Takes, Long Form) and shows you which types resonate most with your audience.
  
  📈 Trends — Track your engagement over time with clean line and bar charts. Spot your best weeks and see if your writing is improving.
  
  🔥 Streak Tracker — A contribution calendar showing your last 30 days of posting. Current streak, longest streak, and consistency stats.
  
  💡 Engagement Insights — Automated coaching from your data. NoteStack tells you what changed, what worked, and what to try next. Like having a data analyst for your Notes.
  
  📤 CSV Export — Download all your Notes data as a spreadsheet for deeper analysis in Excel or Google Sheets.
  
  ⚡ HOW IT WORKS
  1️⃣ Log into substack.com in Chrome
  2️⃣ Click the NoteStack icon in your toolbar
  3️⃣ See your analytics instantly — no setup, no login, no configuration
  
  🔒 PRIVACY FIRST
  ✅ All data stays on your device
  ✅ No server — we literally cannot see your data
  ✅ No analytics, no tracking, no data collection
  ✅ Not affiliated with Substack
  
  🎁 FREE FOR EARLY USERS — All features included at no cost for the first 500 users. Get in early before paid plans launch.

  Stop guessing which Notes work. NoteStack shows you exactly which Substack Notes drive subscribers, engagement, and growth — right in your browser side panel.
  
  ✨ FEATURES
  
  📊 Dashboard — All your Notes ranked by engagement in one clean view. See likes, restacks, comments, and subscribers gained per Note at a glance.
  
  📊 Note Performance Map — Every Note classified as Dynamo, Rocket, Burner, or Wonder based on engagement vs conversion potential. See which Notes actually drive subscribers vs which just get likes.
  
  🔍 Spy Mode — Analyze any public Substack profile. Enter a username and see their top Notes, best content types, posting patterns, and key takeaways. Study what works in your niche.
  
  💡 Engagement Insights — Automated coaching from your data. NoteStack tells you what changed, what worked, and what to try next. Week-over-week comparisons, best content type detection, trend analysis.
  
  🤖 AI Prompt Templates — 8 research-backed templates for generating Notes using your own ChatGPT or Claude. Based on real data from 9,641 analyzed Notes. Clipboard workflow, zero cost.
  
  ♻️ Evergreen Recycler — Your best Notes deserve a second life. Repost scoring tells you which old Notes are ready for a fresh audience. One-click respin with AI.
  
  👥 Top Fans — See who engages with your Notes the most. Leaderboard ranked by comments, restacks, and likes. Know your superfans.
  
  🔖 Note Bookmarks — Save inspiring Notes from your feed as a swipe file. One-click respin into your own voice using AI templates.
  
  🗓️ Best Time Heatmap — A 7x18 grid showing which day and hour combinations drive the most engagement. Know exactly when to post for maximum reach.
  
  ⚡ Optimal Posting Time — Data-driven recommendations for your best time slots. Based on your own engagement data, not generic advice.
  
  🔔 Viral Alert — Get a browser notification when any of your Notes gets 3x your average engagement. Never miss a breakout moment.
  
  🧬 Note DNA — Automatically categorizes your Notes (Questions, Personal Stories, List/Tips, Link Shares, Short Takes, Long Form) and shows you which types resonate most with your audience.
  
  🏷️ Themed Categories — Tag your Notes with color-coded themes (Tips, Story, Opinion, Inspiration, News, Question, Evergreen). Filter your dashboard by theme. Track which themes perform best.
  
  📈 Trends — Track your engagement over time with clean line and bar charts. Spot your best weeks and see if your writing is improving.
  
  🔥 Streak Tracker — A contribution calendar showing your last 30 days of posting. Current streak, longest streak, and consistency stats.
  
  📤 CSV Export — Download all your Notes data as a spreadsheet for deeper analysis in Excel or Google Sheets.
  
  📥 Full Backup and Restore — Export all your NoteStack data as a JSON file. Import it back anytime. Your data, your control.
  
  🗺️ Roadmap — See what we shipped and what is coming next. Built based on real user feedback.
  
  ⚡ HOW IT WORKS
  1️⃣ Log into substack.com in Chrome
  2️⃣ Click the NoteStack icon in your toolbar
  3️⃣ See your analytics instantly — no setup, no login, no configuration
  
  🔒 PRIVACY FIRST
  ✅ All data stays on your device
  ✅ No server — we literally cannot see your data
  ✅ No analytics, no tracking, no data collection
  ✅ Not affiliated with Substack
  
  🎁 FREE FOR EARLY USERS — All 18 features included at no cost for the first 500 users. Get in early before paid plans launch.

• May 31, 2026
  permissions

  storage, alarms, tabs, scripting, sidePanel

  storage, alarms, tabs, scripting, sidePanel, notifications

• May 24, 2026
  description

  Stop guessing which Notes work. NoteStack shows you exactly which Substack Notes drive subscribers, engagement, and growth — right in your browser toolbar.
  
  📊 **Dashboard** — All your Notes ranked by engagement in one clean view. See likes, restacks, comments, and subscribers gained per Note at a glance.
  
  🗓️ **Best Time Heatmap** — A 7×18 grid showing which day+hour combinations drive the most engagement. Know exactly when to post for maximum reach.
  
  🧬 **Note DNA** — Automatically categorizes your Notes (Questions, Personal Stories, List/Tips, Link Shares, Short Takes, Long Form) and shows you which types resonate most with your audience.
  
  📈 **Trends** — Track your engagement over time with clean line and bar charts. Spot your best weeks and see if your writing is improving.
  
  🔥 **Streak Tracker** — A contribution calendar showing your last 30 days of posting. Current streak, longest streak, and consistency stats.
  
  📤 **CSV Export** — Download all your Notes data as a spreadsheet for deeper analysis in Excel or Google Sheets.
  
  ---
  
  **HOW IT WORKS**
  1. Log into substack.com in Chrome
  2. Click the NoteStack icon in your toolbar
  3. See your analytics instantly — no setup, no login, no configuration
  
  NoteStack reads your Notes data using your existing Substack session, exactly like Substack's own website does.
  
  ---
  
  **PRIVACY FIRST**
  ✓ All data stays on your device (IndexedDB)
  ✓ No server — we literally cannot see your data
  ✓ No analytics, no tracking, no data collection
  ✓ Not affiliated with Substack
  
  ---
  
  **100% FREE**
  
  All features included at no cost:
  • Dashboard with all your Notes ranked by engagement
  • Full interactive best-time heatmap
  • Note DNA content analysis
  • Trends charts
  • Posting consistency calendar and streak tracker
  • CSV Export

  Stop guessing which Notes work. NoteStack shows you exactly which Substack Notes drive subscribers, engagement, and growth — right in your browser toolbar.
  
  ✨ FEATURES
  
  📊 Dashboard — All your Notes ranked by engagement in one clean view. See likes, restacks, comments, and subscribers gained per Note at a glance.
  
  🔍 Spy Mode — Analyze any public Substack profile. Enter a username and see their top Notes, best content types, posting patterns, and key takeaways. Study what works in your niche.
  
  🗓️ Best Time Heatmap — A 7x18 grid showing which day and hour combinations drive the most engagement. Know exactly when to post for maximum reach.
  
  🧬 Note DNA — Automatically categorizes your Notes (Questions, Personal Stories, List/Tips, Link Shares, Short Takes, Long Form) and shows you which types resonate most with your audience.
  
  📈 Trends — Track your engagement over time with clean line and bar charts. Spot your best weeks and see if your writing is improving.
  
  🔥 Streak Tracker — A contribution calendar showing your last 30 days of posting. Current streak, longest streak, and consistency stats.
  
  💡 Engagement Insights — Automated coaching from your data. NoteStack tells you what changed, what worked, and what to try next. Like having a data analyst for your Notes.
  
  📤 CSV Export — Download all your Notes data as a spreadsheet for deeper analysis in Excel or Google Sheets.
  
  ⚡ HOW IT WORKS
  1️⃣ Log into substack.com in Chrome
  2️⃣ Click the NoteStack icon in your toolbar
  3️⃣ See your analytics instantly — no setup, no login, no configuration
  
  🔒 PRIVACY FIRST
  ✅ All data stays on your device
  ✅ No server — we literally cannot see your data
  ✅ No analytics, no tracking, no data collection
  ✅ Not affiliated with Substack
  
  🎁 FREE FOR EARLY USERS — All features included at no cost for the first 500 users. Get in early before paid plans launch.

• May 24, 2026
  permissions

  storage, alarms, tabs, scripting

  storage, alarms, tabs, scripting, sidePanel

Permissions & access

Permissions

storagealarmstabsscriptingsidePanelnotifications

Host access

https://substack.com/*, https://*.substack.com/*

Screenshots