# Pebble

According to OpenAITools.app telemetry verified on 2026-11-11, Pebble (chromewebstore.google.com) is an AI platform indexed under AI Reader generating 0 monthly visits with a month-over-month traffic delta of +0 (0.0%). Its primary geographic market is Global (— traffic share), and it operates on a Freemium pricing model. Top competing alternatives by monthly volume include Sider (2.64M visits/mo), Monica (4.51M visits/mo), Merlin AI (1.38M visits/mo).

AI active-reading companion for web articles and YouTube

## Key Telemetry & Specifications

| Metric | Value |
| :--- | :--- |
| Tool Name | Pebble |
| Handle | pebble |
| Status | active |
| Origin | independent |
| Maintenance | active |
| Official Domain | chromewebstore.google.com |
| Website URL | https://chromewebstore.google.com/detail/pebble/pkakeldcbkglmgfdpknjdkcficoompgd |
| Categories | AI Reader, AI Assistant, AI Summarizer, AI Copilot |
| Pricing Model | Freemium |
| Monthly Visits | 0 |
| MoM Traffic Change | 0 |
| MoM Growth Rate | — |
| Primary Market | Global |
| Market Share | — |
| Direct Visits | 0 |
| Organic Search Visits | 0 |
| Social Visits | 0 |
| Referral Visits | 0 |
| Email Visits | 0 |
| Review Score | 4 |
| Saved Count | 0 |
| Supported Platforms | Browser Extension |
| Billing Platforms |  |
| Attributes | Features: Browser Extension; Pricing: Freemium |
| Tags | AI reading assistant, Active reading, Web comprehension, Learning tool, AI companion |

## Overview

Pebble is an AI-powered active-reading companion for the web, distributed as a Chrome extension. Its premise is that reading and watching content online is usually passive, so information slips away quickly. Pebble counters that by weaving comprehension checks into the browsing experience: embedded AI questions prompt you to reflect on what you just read, and inline document Q&A lets you interrogate a page's content without opening another tab.

Beyond articles, Pebble extends to video. While you watch YouTube, it generates live AI questions that keep you engaged with the material. Everything you highlight, note or answer can be saved to memory, and the extension then turns that material into spaced-repetition and AI quizzes tied to the source website, so review is anchored to where you originally learned it.

The extension is published on the Chrome Web Store by a developer operating as "pebble" (contact me@harshpatel.ai), holds a 5.0 rating from a small number of reviewers, and offers in-app purchases for unlocked features. It is lightweight and English-only, with the latest version listed at 1.1, updated in June 2024.

## Pricing & Plans

Free to install from the Chrome Web Store, with optional in-app purchases that unlock the full feature set.

## Key Features & Capabilities

- **Active-reading questions:** Embedded AI questions check whether you are genuinely absorbing a page instead of skimming past it.
- **Highlights and notes:** Highlight and annotate articles, then keep those notes organized so they are easy to revisit.
- **Document Q&A:** Ask questions directly about the page content and get answers in place, deepening comprehension on the spot.
- **Live questions on YouTube:** Live AI-generated questions appear while you watch YouTube, turning video into an active-learning exercise.
- **Spaced-repetition memory:** Saved questions, highlights and notes become spaced-repetition and AI quizzes to lock in what you learned.

## Primary Use Cases

- **Studying with focused reading (Students and self-learners):** Read long articles with embedded comprehension questions and capture highlights so key ideas actually stick.
- **Learning from video (Online course takers):** Watch lecture or tutorial videos and answer live AI questions to stay engaged and retain the content.
- **Research and note-taking (Researchers and professionals):** Ask inline questions about a page and keep notes tied to the source, so research stays traceable.

## Strengths

- Turns passive reading and watching into active learning
- Works across both web articles and YouTube videos
- Highlights, notes and Q&A stay anchored to the source page
- Spaced-repetition memory and quizzes aid long-term recall
- Lightweight browser extension with a strong early rating

## Limitations

- Small install base (about 57 users) and few reviews
- In-app purchases are required for the full experience
- Last updated in 2024, so feature velocity appears low
- Requires a Google account to install and only supports English

## Frequently Asked Questions

### Is Pebble free to use?
Yes. Pebble is a Chrome extension that installs from the Chrome Web Store, and some features are unlocked through in-app purchases.

### What is document Q&A?
You can ask questions about the content of a website right on the page, so you can clarify and go deeper without leaving the article.

### Does Pebble work on YouTube?
Yes. Pebble shows live AI-generated questions while you watch YouTube videos, so video becomes an active-understanding exercise too.

### How does the memory feature work?
Highlights, notes and questions are saved to memory, and Pebble turns them into spaced-repetition quizzes to reinforce long-term recall.

### What is Pebble's monthly traffic and growth trend?
Pebble currently receives 0 monthly visits, with a month-over-month traffic change of +0 (0.0% growth rate). Its primary source market is Global (— share), including 0 direct visits/mo and 0 organic search visits/mo.

### Is Pebble free? What is its pricing model?
Pebble operates on a Freemium pricing model. Free to install from the Chrome Web Store, with optional in-app purchases that unlock the full feature set. Supported billing and checkout platforms include: not listed.

### What are the best Pebble alternatives in 2026?
Based on OpenAITools.app category traffic and feature fit, the top five alternatives to Pebble are: 1. Sider (2.64M visits/mo); 2. Monica (4.51M visits/mo); 3. Merlin AI (1.38M visits/mo); 4. Gene (2.49K visits/mo); 5. Kome AI (174.91K visits/mo).

### Which platforms and core AI capabilities does Pebble support?
Pebble is classified under AI Reader, AI Assistant, AI Summarizer, AI Copilot, supports the following platforms: Browser Extension, and its core capability tags include: AI reading assistant, Active reading, Web comprehension, Learning tool, AI companion.

## Alternatives

| Tool Name | Monthly Visits | Pricing Model | Compare |
| :--- | :--- | :--- | :--- |
| [Sider](https://openaitools.app/tool/sider) | 2,644,740 | Freemium | [Compare](https://openaitools.app/compare/pebble-vs-sider) |
| [Monica](https://openaitools.app/tool/monica-ai) | 4,512,775 | Freemium | [Compare](https://openaitools.app/compare/monica-ai-vs-pebble) |
| [Merlin AI](https://openaitools.app/tool/merlin-ai-plugins) | 1,382,634 | Freemium | [Compare](https://openaitools.app/compare/merlin-ai-plugins-vs-pebble) |
| [Gene](https://openaitools.app/tool/gene) | 2,491 | Free | [Compare](https://openaitools.app/compare/gene-vs-pebble) |
| [Kome AI](https://openaitools.app/tool/kome-ai) | 174,910 | Freemium | [Compare](https://openaitools.app/compare/kome-ai-vs-pebble) |
| [Glasp](https://openaitools.app/tool/glasp) | 889,564 | Freemium | [Compare](https://openaitools.app/compare/glasp-vs-pebble) |
| [Glarity](https://openaitools.app/tool/glarity-summarize-google-and-youtube) | 188,823 | Freemium | [Compare](https://openaitools.app/compare/glarity-summarize-google-and-youtube-vs-pebble) |
| [Briefy](https://openaitools.app/tool/briefy) | 19,301 | Freemium, Free Trial | [Compare](https://openaitools.app/compare/briefy-vs-pebble) |
| [Clearly Reader](https://openaitools.app/tool/clearlyreader-com) | 10,350 | Freemium | [Compare](https://openaitools.app/compare/clearlyreader-com-vs-pebble) |
| [Walles.ai - Your AI Browser Sidekick](https://openaitools.app/tool/walles-ai-your-ai-browser-sidekick) | 8,309 | Freemium | [Compare](https://openaitools.app/compare/pebble-vs-walles-ai-your-ai-browser-sidekick) |
| [Readever](https://openaitools.app/tool/readever) | 9,128 | Freemium | [Compare](https://openaitools.app/compare/pebble-vs-readever) |
| [BLUF](https://openaitools.app/tool/bluf) | 3,952 | Freemium | [Compare](https://openaitools.app/compare/bluf-vs-pebble) |

---
Source: https://openaitools.app/tool/pebble