NoteStack is a Chrome extension built specifically for Substack Notes analytics. It ranks every Note by engagement and subscriber conversion, shows heatmaps for the best time to post on Substack, tracks trends over time, and keeps that analytics data in your browser — no account required.
Chrome Extension for Substack
Grow faster on Substack
with NoteStack.
The Chrome extension for Substack Notes analytics, a full Substack scheduler, and best-time heatmaps — see which Notes convert subscribers and when to post.
- 154
- Notes
- 3,482
- Likes
- +228
- Subs
substack.com
A
Alex Rivera
Updated just now
154
Total Notes
+228
Subscribers Gained
12d
Day Streak
Tue · 9 PM
Best Day to Post
avg 53.3 eng
| Date | Note | ❤️ | 🔄 | 💬 | 👤 ↓ |
|---|---|---|---|---|---|
| Aug 10 | I was rejected by 47 newsletters before I started my own.
Every pitch declined. | 45 | 13 | 8 | 9 |
| Jul 24 | I built my first audience of 500 subscribers before I wrote a single newsletter | 30 | 7 | 5 | 6 |
| Aug 7 | 5 things I wish I knew before my first 100 Substack subscribers:
1. Restacks ma | 22 | 6 | 4 | 4 |
| Jul 10 | My most-read Note of the year took 6 minutes to write. My least-read Note took 3 | 25 | 7 | 4 | 4 |
“Growing every week.” — loved by Substack creators
0
Notes Analyzed
0
Likes Tracked
0-Day
Free Trial on Starter
Substack Analytics Dashboard
Every Note, ranked by what actually grows you
Your Substack analytics dashboard — subscribers gained, engagement, and viral Notes surfaced the moment you open Substack.
Sort by subscriber conversionViral detectionOne-click CSV export
substack.com
A
Alex Rivera
Updated just now
154
Total Notes
+228
Subscribers Gained
12d
Day Streak
Tue · 9 PM
Best Day to Post
avg 53.3 eng
| Date | Note | ❤️ | 🔄 | 💬 | 👤 ↓ |
|---|---|---|---|---|---|
| Aug 10 | I was rejected by 47 newsletters before I started my own.
Every pitch declined. | 45 | 13 | 8 | 9 |
| Jul 24 | I built my first audience of 500 subscribers before I wrote a single newsletter | 30 | 7 | 5 | 6 |
| Aug 7 | 5 things I wish I knew before my first 100 Substack subscribers:
1. Restacks ma | 22 | 6 | 4 | 4 |
| Jul 10 | My most-read Note of the year took 6 minutes to write. My least-read Note took 3 | 25 | 7 | 4 | 4 |
| Jul 17 | I quit writing for 3 weeks last year. Best decision I made.
I was posting 5x a | 18 | 5 | 6 | 3 |
Draft Scheduling
Schedule Substack Notes to publish themselves
Draft, queue, and auto-publish with a Substack scheduler — planned across week, list, and queue views.
- Week & queue planning
- Automatic publishing
- Drafts that never get lost
substack.com
Schedule
This WeekAug 10 – Aug 16
Mon10
Tue11
Wed12
8:00 AM
Grow slow. Own your audience. Don't rent…
💬Thu13
9:00 AM
5 things I wish I knew before my first 1…
💡Fri14
9:00 PM
I was rejected by 47 newsletters before …
📖Sat15
Sun16
2:00 PM
Hot take: most Substack advice is writte…
💬Ghostwriter — Pro
AI that drafts new Notes in your own voice
Ghostwriter reads up to 100 of your Notes to learn your rhythm, hooks, and formatting habits — then drafts new ones on any topic you give it. Training happens from your own writing, never posted automatically.
- Trained on your Notes
- Included with Pro
- Unlimited generations
substack.com
Ghostwriter PRO
Trained 2 days ago
e.g. why consistency beats virality for small newsletters
Your past Notes are sent only to build your voice profile — never posted automatically.
AI Post Coach — Pro
Never stare at a blank page again
Post Coach reads your own top-performing content types, best posting times, and current streak — then hands you one concrete idea, grounded in your own data.
- Grounded in your data
- One suggestion, not a wall of options
substack.com
AI Post Coach PRO
Suggestion
Write a “what I'd tell myself at 0 subscribers” Note. Your story-format Notes convert 2.3× your average, and you haven't posted one in 11 days.
Best window: Tuesday 9–10 AM
Best Time Heatmap
Post when your audience is actually there
A 7×18 engagement heatmap and a 30-day consistency streak, read at a glance.
- Best-time recommendations
- Streak tracking
substack.com
YOUR BEST TIME TO POST
Friday at 9 PM
avg 53.3 engagement per Note
📅 Best Time to Post
Avg engagement (❤️ + 3×🔄 + 2×💬) · cells need 2+ notes to show colour
6a
9a
12p
3p
6p
9p
Mon
Tue
Wed
Thu
Fri
Sat
Sun
LowHigh
🎯 Best time to post: Fri at 9p — avg 53.3 engagement.
🔥 Posting Consistency
Last 30 days — darker green = more notes posted
0STREAK
6LONGEST
19/30DAYS POSTED
1NOTES/DAY
Performance Map
See which Notes turn readers into subscribers
Every Note plotted on engagement × conversion — Dynamos, Wonders, Rockets, Burners.
- Conversion quadrants
- Spot evergreen winners
substack.com
Trend Analytics
Watch your growth compound over time
Weekly volume, daily engagement, and rolling averages in clean historical charts.
Notes per weekDaily engagementRolling averages
substack.com
Notes Posted Per Week
Last 7 weeks
Daily Engagement
Total weighted engagement, 30 days
Avg Likes Per Note
30-day rolling
Note DNA
Know which kind of Note to write next
NoteStack classifies your content and shows exactly what your audience rewards.
- Auto-categorized
- Engagement by type
substack.com
Note DNA
How your content breaks down by type — sorted by engagement
Personal Story12 notes
Question5 notes
Other1 note
List/Tips4 notes
Quote/Repost1 note
Link Share3 notes
Short Take6 notes
Your Personal Story notes get 5.5× more engagement than Short Take notes.
Spy Mode
Reverse-engineer any creator's playbook
Top Notes, content DNA, and posting patterns for any public Substack profile.
- Competitor research
- Posting patterns
substack.com
N
Naval Ravikant
@naval
24
Notes
15.1
Avg Likes
3.3
Avg Restacks
3.5
Avg Comments
Top Notes
| Note | ❤️ | 🔄 | 💬 |
|---|---|---|---|
| I was rejected by 47 newsletters before I started my own. E… | 45 | 13 | 8 |
| I built my first audience of 500 subscribers before I wrote … | 30 | 7 | 5 |
| My most-read Note of the year took 6 minutes to write. My le… | 25 | 7 | 4 |
| Hot take: most Substack advice online is written by people w… | 30 | 1 | 8 |
Content DNA
Personal Story12 notes
Question5 notes
Other1 notes
List/Tips4 notes
Personal Story Notes get 5.5× more engagement than Short Take Notes.
Posts most on Tuesdays, but gets peak engagement on Mondays.
Top Note (45 likes): "I was rejected by 47 newsletters before…" — a Personal Story.
Top Fans
Know exactly who to nurture
A leaderboard of the readers who engage with you most — your future paid subscribers.
- Superfan ranking
- Who to thank
substack.com
Top Fans
🥇
S
Sarah Chen@sarahwrites
💬 24 · 🔄 18 · ❤️ 42
Last active: Today
198 pts
🥈
M
Marcus Webb@marcusnotes
💬 19 · 🔄 22 · ❤️ 31
Last active: Yesterday
191 pts
🥉
E
Elena Park@elenapark
💬 15 · 🔄 14 · ❤️ 28
Last active: 2d ago
149 pts
#4
J
James Holt@jamesholt
💬 12 · 🔄 11 · ❤️ 19
Last active: 3d ago
108 pts
#5
P
Priya Nair@priyanair
💬 9 · 🔄 8 · ❤️ 15
Last active: 5d ago
78 pts
Media Kit
A sponsor pitch, built in one click
NoteStack turns your real stats into a sponsor-ready one-pager PDF — subscriber count, top Notes, and engagement, reframed honestly. No watermark.
- Real stats, not guesses
- Export to PDF
- No watermark
substack.com
Media Kit
A sponsor-ready one-pager, built from your real Notes stats
Alex Rivera
Practical growth tactics for indie writers
2,340
subscribers
47
notes
28.4
avg engagement
Top performing Notes
1. The 5-minute morning routine that doubled my reach… — 241 · 38 restacks
2. Unpopular opinion: your welcome email matters… — 187 · 24 restacks
AI Prompt Templates
Write better Notes with AI that knows what converts
Research-backed prompts for ChatGPT and Claude, ready to copy and run.
Proven frameworksOne-click copy
substack.com
AI Prompt Templates
Research-backed templates for ChatGPT and Claude
8 Notes — 4 Formats
TOPIC: {USER_TOPIC}
CONTEXT: {USER_CONTEXT}
TARGET AUDIENCE: {USER_AUDIENCE}
Write exactly 8 Substack Notes — 2 in each format below:
**EDUCATIONAL** — Teach 1 clear, specific idea. Show a fresh angle the reader hasn't considered.
**GROWTH** — Share a personal discovery, min…How It Works
From install to insight in 60 seconds
No learning curve. No data migration. Just install, open Substack, and start growing.
- 01
Install the extension
Add NoteStack from the Chrome Web Store. No account, no setup, no configuration.
- 02
Open Substack
Log in as you normally would. NoteStack uses your existing session — nothing extra.
- 03
Analyze and schedule instantly
Open the side panel to see your Substack analytics dashboard, schedule Substack Notes, and discover what drives growth.
Why NoteStack
Stop guessing.
Start compounding.
Every habit that used to be a shrug becomes a Substack analytics decision backed by your own data.
Know your best posting time
Guess best posting time
Automatic scheduling
Manual scheduling
Complete analytics
No analytics
Historical insights
No trends
AI drafts in your own voice
Blank page every time
Evergreen recommendations
No repost strategy
Pricing
Two plans. Every one starts with a free trial.
Starter unlocks the full dashboard, analytics, and scheduler — with a 7-day free trial. Pro removes every monthly cap and adds unlimited AI drafting and competitor research for creators who post seriously.
Starter
Everything you need to understand and grow on Substack.
$5/mo
Billed annually at $60/yr — save $36/year · 7-day free trial
- Dashboard
- Performance Map
- Best Time Heatmap
- Note DNA
- Trend Analytics
- Top Fans
- Streak Tracker
- Themes
- Evergreen Recycler
- Viral Alerts
- CSV Export
- Backup & Restore
- Media Kit
- AI Prompt Templates
- Bookmarks
- Spy Mode
- Scheduler
Spy Mode: 30 profiles/month · Scheduler: 7 new Notes/month
Install the NoteStack Chrome ExtensionInstall the extension, then start your free trial from Settings.
Most popular
Pro
For creators who post consistently and want AI doing the heavy lifting.
$8.25/mo
Billed annually at $99/yr — save $45/year
- Everything in Starter, unlimited:
- Ghostwriter
- AI Post Coach
- Unlimited Spy Mode & Scheduler — no monthly cap
Install the extension, then subscribe from Settings inside NoteStack.
Taxes may apply and will be calculated at checkout.
Your Notes stay on your device
NoteStack reads your Notes through your existing Substack session and keeps them, your profile, and your subscriber stats in your browser — always. AI generation and Pro license checks are the one disclosed exception: they call our relay server to work at all. We list exactly what it sends, and why.
Read the full privacy policyOn-device by default
Notes, profile & stats live in your browser's IndexedDB.
One disclosed exception
AI features & Pro licensing use our relay — nothing else does.
No tracking
Zero analytics, telemetry, or fingerprinting.
No account
Nothing to sign up for.
You own it
Export or wipe your data anytime.
Independent
Not affiliated with Substack.
FAQ
Substack analytics & scheduling, answered
Common questions about NoteStack — the Chrome extension for Substack Notes analytics, draft scheduling, and on-device privacy.
Yes. NoteStack includes a full Substack scheduler with week, list, and queue views. Draft Notes, pick a publish time, and NoteStack publishes them automatically using your existing Substack session. Starter includes 7 new scheduled Notes a month; Pro removes the limit entirely.
Install the NoteStack Chrome extension, log into substack.com, and open the side panel. NoteStack reads your Notes through your browser session and displays a Substack analytics dashboard with subscriber gains, likes, restacks, viral detection, Note DNA classification, and CSV export.
NoteStack has two plans, both starting with a free trial. Starter ($8/mo or $60/yr, 7-day free trial) unlocks the full dashboard, analytics, and scheduler, plus a capped Spy Mode (30 profiles/month) and Scheduler (7 new Notes/month). Pro ($12/mo or $99/yr) removes both caps entirely and adds Ghostwriter, AI generation, and AI Post Coach. See Pricing for the full breakdown.
NoteStack Pro removes Starter's monthly Spy Mode and Scheduler caps entirely, and adds Ghostwriter (AI Notes drafted in your own voice), AI generation from any prompt template, AI Post Coach suggestions, and AI draft scoring/flop diagnosis — none of which Starter includes.
Your Notes, profile, and analytics stay in your browser's IndexedDB under NoteStackDB — you can export or delete it anytime. The one exception: if you use Ghostwriter, AI Post Coach, or subscription license validation, a limited, disclosed set of data is sent to our relay server to make those specific features work. See our Privacy Policy for the full breakdown.
NoteStack is a Chrome extension for Substack creators that combines Notes analytics, draft scheduling, best-time heatmaps, trend insights, competitor research (Spy Mode), a sponsor-ready Media Kit, and AI writing tools — including Ghostwriter and AI Post Coach.
NoteStack includes AI prompt templates optimized for Substack Notes — copy a research-backed template into ChatGPT or Claude, or generate directly with Ghostwriter, which drafts new Notes in your own writing style after learning from your past Notes.
Start growing on Substack today
Install the Chrome extension for Substack analytics, scheduling, and AI — built into your browser. Every plan starts with a 7-day free trial.
7-day free trial on Starter · No account required · Works on every Substack