Grow on Substack
without guessing.
Extract analytics from your Notes in seconds. No spreadsheets, no guesswork — point, click, and see what actually grows your Substack.
$7 lifetime access · 7-day money-back guarantee · Built for Substack creators
One extension, every Chromium browser.
Every Note, ranked by what actually grows you
Your own Notes, ranked by engagement — plus a Viral Alert the moment one takes off, and a full history Substack itself doesn't keep.
- Ranked by real engagement
- Viral detection
- One-click CSV export
Know which kind of Note to write next
NotesIQ classifies your content and shows exactly what your audience rewards.
- Auto-categorized
- Engagement by type
Reverse-engineer any creator's playbook
Top Notes, content type breakdown, and posting patterns for any public Substack profile.
- Competitor research
- Posting patterns
Know exactly who to nurture
A leaderboard of the readers who engage with you most — your future paid subscribers.
- Superfan ranking
- Who to thank
Post when your audience is actually there
A 7-day x 6-time-slot engagement heatmap and your current posting streak, read at a glance.
- Best-time recommendations
- Streak tracking
Watch your subscriber count climb over time
NotesIQ reads your subscriber count straight off your public profile — no manual entry needed — and quietly tracks it over time, since Substack itself won't show you that history.
- Auto-detected, no setup
- Tracked forever on this device
- Feeds straight into your Media Kit
Watch your growth compound over time
Weekly volume, daily engagement, and rolling averages in clean historical charts — with a full all-time view Substack's own dashboard doesn't offer.
- Notes per week
- Daily engagement
- All-time history, not just Substack's 90-day cap
“I noticed something: people who have traveled a lot tend to judge less.”
Your best Notes deserve a second life
Notes older than 60 days that outperformed your average get surfaced automatically — reposting proven content weeks later routinely performs just as well the second time.
- Surfaces your real top performers
- One click into Compose or the Queue
- No guessing what to write next
“I noticed something: people who have traveled a lot tend to judge less.”
Know the moment a Note takes off
When a Note pulls in meaningfully more engagement than your own average, NotesIQ flags it immediately — so you can lean into what's working while it's still live, not three days later.
- Compared against your own baseline
- Surfaced the moment you open the panel
- No configuration required
Schedule Substack Notes to publish themselves
Compose one Note, or load up a whole week's worth in the Queue — NotesIQ drives Substack's own scheduler to publish them for you, right on time.
- Single or bulk week queue
- Automatic publishing
- Drafts that never get lost
AI that drafts new Notes in your own voice
Ghostwriter reads your best-performing Notes to learn your voice — then drafts a new one on any topic you give it.
- Trained on your top Notes
- Included with AI 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
A sponsor pitch, built in one click
NotesIQ turns your real stats into a sponsor-ready one-pager — subscriber count, top Notes, and engagement, reframed honestly. No watermark.
- Real stats, not guesses
- Export as a shareable file
- No watermark
Write better Notes with AI that knows what converts
Research-backed prompts for ChatGPT and Claude, ready to copy and run.
8 Notes — 4 Formats
Educational, Growth, Entertaining, Inspirational (2 each)
Awareness Ladder
One Note per audience awareness level — from cold to ready-to-act
Respin Your Best Note
5 variations of your top-performing Note — different angles, same insight
Article to 10 Notes
Turn a long post into 10 standalone Notes
Hook Rewriter
Rewrite your opening line using proven hook formulas
10 Discussion Starters
Notes engineered for comments (which boost reach)
21 Angles from 1 Idea
Turn one topic into 21 different Notes using proven angle types
Analyze Why This Note Worked
AI compares your best vs worst Note and tells you why
From install to insight in 60 seconds.
No learning curve. No data migration. Just install, open Substack, and start growing.
Install the extension
Add NotesIQ from the Chrome Web Store. No account, no setup, no configuration.
Open Substack
Log in as you normally would. NotesIQ uses your existing session — nothing extra.
Analyze and schedule instantly
Open the side panel to see your analytics dashboard, schedule Notes, and discover what drives growth.
Stop guessing. Start compounding.
Every habit that used to be a shrug becomes a decision backed by your own Substack data.
Know your best posting time
A 7x18 heatmap tells you exactly.
Automatic scheduling
Draft, queue, auto-publish.
Complete analytics
Every Note ranked by what matters.
Historical insights
Watch growth compound over time.
AI drafts in your own voice
Ghostwriter drafts for you.
Evergreen recommendations
Surface your best older Notes.
Get Lifetime Access
One-time payment. No subscription for analytics. Updates forever.
- Dashboard & Performance Map
- Best Time Heatmap & Content Type Breakdown
- Trend Analytics & Top Fans
- Evergreen Recycler & Viral Alerts
- CSV Export & Backup/Restore
- Media Kit & Bookmarks
- Unlimited Scheduler — single Notes or a full week's Queue
- Unlimited Competitor Analysis
Everything in Lifetime · Ghostwriter — AI drafts in your voice · AI Post Coach — data-driven suggestions
Taxes may apply and will be calculated at checkout.
Your Notes stay on your device
NotesIQ reads your Notes through your existing Substack session and keeps them, your profile, and your subscriber stats in your browser — always. AI generation and license checks are the one disclosed exception: they call our relay to work at all. We list exactly what it sends, and why.
On-device by default
Notes, profile & stats live in your browser's IndexedDB.
One disclosed exception
AI features and license checks 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.
Add a real quote from one of your first users here once you have feedback.
Add a second real quote here — ideally about a specific result they got.
Frequently Asked Questions
Everything you need to know about NotesIQ.
What is NotesIQ?
NotesIQ is a Chrome extension built specifically for Substack Notes analytics, draft scheduling, and AI-assisted writing — all running inside your browser.
Can I schedule Substack Notes?
Yes. Draft a single Note or load up a whole week's worth in the Queue, and NotesIQ will publish them for you at the scheduled time.
How much does NotesIQ cost?
The core analytics and scheduler are a one-time Lifetime payment ($7). AI features (Ghostwriter, Post Coach) are a separate subscription add-on at $9/mo.
Why is AI a subscription instead of one-time?
AI drafting has a real, ongoing cost per generation. Keeping it a subscription lets us keep the Lifetime analytics plan affordable and permanently one-time.
What does 'Lifetime Access' include?
Every current and future analytics/scheduler feature, forever, for one payment — Dashboard, Performance Map, Heatmap, Content Type Breakdown, Scheduler, and more.
Can I get a refund?
Yes — Lifetime purchases are covered by a 7-day money-back guarantee, no questions asked.
Does my data stay local?
Yes. Your Notes, profile, and stats are stored in your browser's IndexedDB. License activation talks directly to our payment processor, and AI drafting sends your topic and top Notes to our AI server to generate a draft.
Does it work on all browsers?
NotesIQ works on Chrome and other Chromium-based browsers (Edge, Brave, Opera) today. Firefox support is planned via a WebExtensions port.
Start growing on Substack today.
7-day money-back guarantee · No account required · Works on every Substack