NotesIQ: Comprehensive Analytics and Scheduling for Substack Notes

Overview

NotesIQ is a powerful Chrome extension designed specifically for Substack creators. It serves as an all-in-one solution for analytics, scheduling, and AI-assisted drafting, helping creators move beyond guesswork to make data-driven decisions about their content strategy. Built entirely within the browser, it allows users to track performance, optimize posting times, and generate content ideas without needing to sign up for external accounts or worry about data leaving their device.

Benefits

NotesIQ provides deep insights into creator performance that go beyond Substack's native 90-day dashboard. Key analytical tools include ranking Notes based on real engagement metrics like likes, restacks, and comments rather than just views. The tool analyzes which formats such as personal stories or lists generate the most engagement. A best time heatmap visualizes when specific Notes perform best, tailored to the creator's own audience patterns instead of generic rules. Trend analytics display weekly volume and daily engagement charts with an all-time view extending back to the creator's first tracked Note. Viral alerts send a banner notification immediately when a Note performs meaningfully better than the creator's average. Subscriber growth is automatically detected and tracked over time from public profiles.

The tool streamlines the publishing process to help creators batch their work and maintain consistency. Users can post or schedule Notes directly through Substack's native composer and scheduler. A queue tab allows users to load a week's worth of Notes at once with one-click best-time autofill. The evergreen recycler surfaces old Notes that previously performed well, allowing for one-click reuse. Competitor research enables users to look up any public Substack handle to analyze their content mix, posting patterns, and optimal posting times. The top fans leaderboard identifies the readers who restack and comment the most, aiding in relationship building.

NotesIQ includes optional AI features to overcome writer's block and streamline content creation. The ghostwriter uses the creator's best-performing Notes to draft new content on supplied topics in their unique voice. The post coach generates content ideas grounded in the creator's specific content types, posting times, and streaks. Prompt templates offer copy-paste prompts for AI models, some pre-filled with the user's top-performing Notes. Editorial workflows include templates for turning articles into multiple Notes, rewriting hooks, generating discussion starters, and creating multiple angles from a single idea.

Data management and privacy are handled with care. Notes, profile information, and statistics are stored in the browser's local storage. No account or sign-up is required, and no data leaves the device unless explicitly sent to the AI server for drafting. Users can perform full backup and restore operations as JSON files, export data as CSV, or generate a media kit for sponsor pitches. Bookmarks allow saving any Note for later reuse.

Use Cases

NotesIQ is best suited for Substack creators who want to identify which specific Notes drive paid subscriptions or subscriber growth. It helps those who rely on memory or spreadsheets to judge content performance and wish to adopt a repeatable measurement and publishing routine. Creators who need to optimize posting schedules based on their specific audience activity patterns will find it useful. Writers who experience writer's block and require AI assistance to generate drafts or ideas can benefit greatly. Those who wish to analyze competitor strategies without leaving their browser will also find this tool valuable.

Pricing

NotesIQ offers a transparent, one-time payment model. The lifetime plan is a single payment of $4.99 that unlocks everything, including lifetime access to updates, analytics, scheduling, and AI features. This includes a 7-day money-back guarantee. While the official Chrome Web Store and primary product details list the $4.99 lifetime fee, some third-party directories have historically listed higher figures. Users are advised to verify the current pricing at checkout, as terms may change.

Vibes

The tool has received positive feedback for its ability to provide deep insights and streamline the publishing process. Users appreciate the local storage feature that keeps their data private and the one-time payment model that avoids recurring fees. The AI features have been noted for helping creators overcome writer's block and generate content in their unique voice. The viral alerts and best time heatmap are particularly valued for helping creators maximize engagement and grow their newsletter more effectively.

Additional Information

NotesIQ is developed by Amit Kumar and is available as a Chrome extension. It requires the Chrome browser to function. The tool is live and was last updated in October 2026. It is closed source, meaning the source code is not publicly available. The developer declares that data is not sold to third parties, not used for creditworthiness, and is only used for core functionality. Users should note that AI drafting sends topics and top Notes to the company's AI server. The tool is designed to help Substack creators refine their content strategy, maximize audience engagement, and grow their newsletter more effectively.