# Concentration vs Kumo Study

Concentration records 0 monthly visits with — month-over-month growth and Free pricing. Kumo Study records 2,807 monthly visits with +23.8% growth and Freemium pricing.

| Metric | [Concentration](https://openaitools.app/tool/concentration) | [Kumo Study](https://openaitools.app/tool/kumo-study) |
| :--- | :--- | :--- |
| Website URL | https://chrome.google.com/webstore/detail/concentration/jkilnegoiabelpjhljiagmmnnppdaajf | https://www.kumostudy.com |
| Categories | AI Productivity Tools, Large Language Models (LLMs), AI Chatbot, AI Assistant | Other |
| Pricing Model | Free | Freemium |
| Monthly Visits | 0 | 2,807 |
| MoM Growth Rate | — | +23.8% |
| Primary Market | Global | United States |
| Direct Visits | 0 | 859 |
| Review Score | 4.2 | 3.8 |
| Saved Count | 3 | 0 |
| Supported Platforms | Browser Extension | Website |

## Concentration

Concentration is a lightweight Chrome extension built around a simple idea: instead of maintaining a hand-written blocklist, you describe the kinds of sites you want to avoid and let AI decide which pages match. You enable the extension, open its popup, and submit one or more topic keywords — for example "gaming", "streaming" or "movie". From then on, when you browse, Concentration evaluates the sites you visit against those keywords and blocks the ones that fit.

The extension offers two engines. Strict Mode relies on natural-language processing: it is fast but occasionally less precise. GPT Mode routes the same judgement through ChatGPT, which is slower but more accurate. You can switch between the two at any time, and you can remove keywords individually or reset the list entirely. Because the keywords are topical rather than tied to fixed domains, the blocker adapts to new and unfamiliar sites without any manual list maintenance.

Concentration is free to use and, according to its Chrome Web Store listing, does not require a paid ChatGPT subscription. The listing (version 2.01, updated September 22, 2023) reports a 4.6-star average from about 20 ratings and roughly 228 users. The developer states that collected data on web history, user activity and website content is not sold to third parties.

**Pricing & Plans:** Free. Concentration is offered at no charge and, per the Chrome Web Store listing, does not require a paid ChatGPT subscription to use its GPT Mode.

- **Keyword-based blocking:** Enter topical keywords such as "gaming" or "movie" and the extension blocks pages that match them, so you never have to curate a fixed domain blocklist.
- **NLP vs ChatGPT modes:** Switch between Strict Mode, which uses faster NLP classification, and GPT Mode, which uses ChatGPT for greater accuracy on ambiguous pages.
- **Simple keyword management:** Submit keywords one at a time, remove them individually with an ✗ control, or wipe the whole list with a single Remove All action.
- **No paid AI plan required:** The developer states you do not need a paid ChatGPT subscription to use the extension's ChatGPT-powered mode.
- **Lightweight Chrome footprint:** The extension ships as a small ~1.5 MiB package that runs quietly in the background and is controlled from a popup.

**Strengths:** Free with no required ChatGPT subscription; Keyword-based logic adapts to new sites without maintaining a blocklist; Two engines let you trade speed for accuracy; Very small download footprint (~1.5 MiB)

**Limitations:** Last updated September 2023, so it does not track newer Chrome or GPT APIs; Small user base and only ~20 ratings, so reliability signals are thin; Keyword blocking can over-block legitimate pages that mention a topic

[Profile (Markdown)](https://openaitools.app/tool/concentration.md)

## Kumo Study

Kumo Study is a Chrome extension designed around the study habits of people with ADHD. Instead of stacking separate apps for planning, timing, and distraction blocking, it puts a weekly planner, a customizable interval timer, a site blocker, and a research bookmark manager into a single browser toolbar surface. The result is one place to see what needs doing, start a focused session, and keep tempting sites out of reach.

Progress tracking and gamification are central to the design. Users earn points and rewards for completing tasks and routines, can interact with friends, and can watch goals accumulate over time. The bookmark area is built for students who write papers: quotes and citations go into custom folders with notes and drafts attached, and everything stays searchable by tag so research does not get lost.

Kumo also supports collaboration, which is unusual for a study tool. A mentor, occupational therapist, study buddy, or family member can join through a collaborator dashboard, add tasks, help shape routines, and send incentives. The free plan covers core planning with 30 bookmarks and 3 blocked sites plus a 15-day trial of Unlimited Kumo, while Kumo Unlimited removes the caps and unlocks collaborators and sensory profile insight for $9.99 per month. Schools and teams can request a custom Business package that includes student performance monitoring and training.

**Pricing & Plans:** Kumo Study is freemium. The free plan includes a 15-day Unlimited trial, a planner, 30 bookmarks, 3 blocked sites, the study timer, and progress tracking. Kumo Unlimited is listed at $9.99 per month (with annual billing available), adding unlimited bookmarks and blocked sites, collaborators, and sensory profile insight. A Business tier is quoted on request.

- **ADHD-friendly planner:** Plan the week, set daily routines, and track progress so important tasks stop slipping through the cracks.
- **Customizable study timer:** Break study sessions into manageable intervals to prevent burnout and protect concentration.
- **Site blocker:** Restrict distracting websites during study or research sessions so focus is not interrupted.
- **Research bookmarks:** Store quotes and citations in custom folders, add notes and drafts, and retrieve them by search or tag.
- **Collaborator dashboard:** Invite a mentor, therapist, or family member to add tasks, adjust routines, and send incentives.

**Strengths:** Purpose-built for ADHD study patterns instead of being a generic task app; Combines planning, timers, blocking, and citation bookmarks in one extension; Collaborator dashboard lets mentors or therapists support progress directly; Generous free plan with a 15-day unlimited trial

**Limitations:** Requires installing a Chrome extension rather than working as a standalone web app; Advanced collaboration and unlimited usage sit behind the paid tier; The ADHD-specific framing is excellent for its audience but narrows its appeal for general study users

[Profile (Markdown)](https://openaitools.app/tool/kumo-study.md)

## Frequently Asked Questions

### How do Concentration and Kumo Study compare in monthly traffic?

Concentration has 0 monthly visits, while Kumo Study has 2,807. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Concentration has a month-over-month growth rate of —; Kumo Study has +23.8%.

### How does pricing compare?

Concentration: Free. Free. Concentration is offered at no charge and, per the Chrome Web Store listing, does not require a paid ChatGPT subscription to use its GPT Mode. Kumo Study: Freemium. Kumo Study is freemium. The free plan includes a 15-day Unlimited trial, a planner, 30 bookmarks, 3 blocked sites, the study timer, and progress tracking. Kumo Unlimited is listed at $9.99 per month (with annual billing available), adding unlimited bookmarks and blocked sites, collaborators, and sensory profile insight. A Business tier is quoted on request.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Duck.ai](https://openaitools.app/tool/duck-ai) | 26,431,539 | +10.7% | Free | Private AI chat from the makers of DuckDuckGo | [.md](https://openaitools.app/tool/duck-ai.md) |
| 2 | [Monica](https://openaitools.app/tool/monica-ai) | 4,512,775 | -11.3% | Freemium | All-in-one AI assistant across web, browser, desktop and mobile | [.md](https://openaitools.app/tool/monica-ai.md) |
| 3 | [Sider](https://openaitools.app/tool/sider) | 2,644,740 | -10.6% | Freemium | AI sidebar and browser agent for reading, writing and research | [.md](https://openaitools.app/tool/sider.md) |
| 4 | [AIPRM](https://openaitools.app/tool/aiprm) | 708,870 | -6.9% | Freemium, Paid | A prompt library and management layer for ChatGPT and other AI models | [.md](https://openaitools.app/tool/aiprm.md) |
| 5 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | One browser agent that combines every major AI model with web automation | [.md](https://openaitools.app/tool/harpa-ai.md) |
| 6 | [Cognito](https://openaitools.app/tool/cognitoedu-org) | 252,707 | +71.5% | Free | Free video lessons, quizzes and flashcards for exam success | [.md](https://openaitools.app/tool/cognitoedu-org.md) |
| 7 | [LoadMuscle](https://openaitools.app/tool/loadmuscle) | 147,158 | -25.4% | Freemium | AI workout planner that builds your whole training week around your gear and goals | [.md](https://openaitools.app/tool/loadmuscle.md) |
| 8 | [Legacy Online School](https://openaitools.app/tool/legacy-online-school) | 48,317 | -12.7% | Contact for Pricing | Accredited K-12 online school with live classes and flexible pacing | [.md](https://openaitools.app/tool/legacy-online-school.md) |
| 9 | [FlowTunes](https://openaitools.app/tool/flowtunes) | 30,144 | -2.8% | Free | Free focus music app with curated playlists for deep work | [.md](https://openaitools.app/tool/flowtunes.md) |
| 10 | [sshx](https://openaitools.app/tool/sshx) | 13,059 | +43.1% | Free | Share your terminal with anyone by link — multiplayer, encrypted, in the browser | [.md](https://openaitools.app/tool/sshx.md) |

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Source: https://openaitools.app/compare/concentration-vs-kumo-study

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