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 runs entirely in your browser — no server, no account.
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 | ❤️ | 🔄 | 💬 | 👤 ↓ |
|---|---|---|---|---|---|
| Jun 24 | I was rejected by 47 newsletters before I started my own.
Every pitch declined. | 45 | 13 | 8 | 9 |
| Jun 7 | I built my first audience of 500 subscribers before I wrote a single newsletter | 30 | 7 | 5 | 6 |
| Jun 21 | 5 things I wish I knew before my first 100 Substack subscribers:
1. Restacks ma | 22 | 6 | 4 | 4 |
| May 24 | 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
Free for Early Users
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 | ❤️ | 🔄 | 💬 | 👤 ↓ |
|---|---|---|---|---|---|
| Jun 24 | I was rejected by 47 newsletters before I started my own.
Every pitch declined. | 45 | 13 | 8 | 9 |
| Jun 7 | I built my first audience of 500 subscribers before I wrote a single newsletter | 30 | 7 | 5 | 6 |
| Jun 21 | 5 things I wish I knew before my first 100 Substack subscribers:
1. Restacks ma | 22 | 6 | 4 | 4 |
| May 24 | My most-read Note of the year took 6 minutes to write. My least-read Note took 3 | 25 | 7 | 4 | 4 |
| May 31 | 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 WeekJun 22 – Jun 28
Mon22
Tue23
Wed24
Thu25
Fri26
8:00 AM
Grow slow. Own your audience. Don't rent…
💬Sat27
9:00 AM
5 things I wish I knew before my first 1…
💡Sun28
9:00 PM
I was rejected by 47 newsletters before …
📖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
Sunday 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: Sun 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 Thursdays, but gets peak engagement on Wednesdays.
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
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
Built-in prompt library
No AI prompts
Evergreen recommendations
No repost strategy
Your data never leaves your device
NoteStack reads your Notes through your existing Substack session and keeps every Substack analytics metric in your browser. Private by architecture — not by policy.
Read full privacy policyOn-device only
Stored in your browser's IndexedDB.
No servers
We have nothing to breach.
No tracking
Zero analytics or telemetry.
No account
Nothing to sign up for.
You own it
Export or wipe 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.
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.
Yes — for early users. NoteStack is free for the first 500 users with every feature included: Substack dashboard analytics, heatmaps, draft scheduling, trend charts, Spy Mode, AI prompt templates, and CSV export.
Yes. All Substack analytics data is stored in your browser's IndexedDB under NoteStackDB. NoteStack has no server and cannot access your information. You can export or delete your data at any time.
NoteStack is a Chrome extension for Substack creators that combines Substack Notes analytics, draft scheduling, best-time heatmaps, trend insights, competitor research (Spy Mode), and AI writing templates — all running locally in your browser.
NoteStack includes AI prompt templates optimized for Substack Notes. Copy a research-backed template, paste it into ChatGPT or Claude, and generate Notes designed to convert — based on patterns from thousands of analyzed Notes.
Start growing on Substack today
Install the free Chrome extension for Substack analytics, scheduling, and AI — built into your browser. Free for the first 500 early users.
Free for early users · No account required · Works on every Substack