Monica

What is Monica?

Monica is an AI browser extension that lives in your browser rather than in a separate tab. Press Cmd+M or Ctrl+M on any page and a sidebar opens where you can ask a question, summarise what you are reading, translate a selection, rewrite a paragraph, or hand a PDF over for questioning. The company's own FAQ describes it plainly as a Chrome extension powered by the GPT API, designed as a personal AI assistant for chatting and copywriting — though the product has grown well past that description since it launched in 2023.

The design premise worth understanding is aggregation — this is multi-model AI in the literal sense. Monica does not train its own frontier models; it puts other people's behind one interface. Its site lists Claude, GPT, Gemini and Nano Banana variants side by side as selectable options, and its mobile listing goes further, naming DALL·E 3, Stable Diffusion, Flux, Recraft, Ideogram, Playground and Imagen for images, and Sora 2, SVD, Runway Gen-3 and Pika for video. The footer even carries the disclaimer that ChatGPT is a registered trademark of OpenAI OpCo, LLC. That is the honest shape of the product: a convenience and routing layer over models built elsewhere, with the practical benefit that you compare answers from several without maintaining several subscriptions.

Who is behind it matters more than usual here. The publisher across all three stores is BUTTERFLY EFFECT PTE. LTD., a Singapore-registered company whose Google Play developer contact is support@manus.ai — the same company that built Manus, the general-purpose AI agent. CNBC reported that Manus began as a product of the Chinese start-up Butterfly Effect, also known as Monica.Im, before becoming a separate entity, that the company raised a $75 million Series B led by Benchmark with Tencent and HongShan among its backers, and that it laid off most of its Beijing staff before relocating its headquarters to Singapore. The corporate story since then has been eventful, and it is covered in the limitations section below because it bears on service continuity.

Core Features

• Multi-model chat from one sidebar: The store listing describes chatting with several LLMs in one place, and the site lists specific selectable models across vendors. In practice this is the feature people install for: ask once, switch model, compare. It removes the need to keep separate accounts open for each lab's chat product.
• Page and video summarisation: AI summary is the company's headline efficiency claim — it advertises saving 90% of your time by instantly summarising web pages and videos, a vendor figure that has not been independently verified. The mobile app extends this to PDFs and YouTube videos and can output a mind map rather than prose.
• PDF chat and document Q&A: Upload a PDF or an image and ask questions against it. The site maintains a whole PDF tool line around this — ChatPDF, PDF Translator, PDF to PNG, PDF to PPT, plus resume checking and scanning.
• Translation and rewriting in place: Select text on any page and have it explained, translated or rephrased without leaving the page. There is a separate AI Translator and a PDF Translator for whole-document work.
• Writing tools: A dedicated line covering an AI text humaniser, rewriting, summarisation, and templated generation with adjustable tone and structure on mobile.
• Image and video generation: Text-to-image through a long roster of third-party models with 50+ styles, image-to-image, image-to-animation, watermark removal, logo generation and photo-to-cartoon, plus text-to-video routed to Sora 2, SVD, Runway Gen-3 and Pika.
• Agent capabilities: The store listing names four — Monica Agent for automating multi-step workflows, Browser Operator for AI automation that controls your browser across multiple sites, Deep Research for one-click comprehensive reports, and Slides Generation for turning an idea into a presentation.
• Prompt library and voice input: Saved prompts are recalled by typing /, and a microphone button lets you talk instead of type. Small features, but they are what turn an occasional tool into a daily one.
• Monica Code for IDEs: A separate code assistant for VSCode and JetBrains IDEs, listed alongside the browser, desktop and mobile clients.

Use Cases

1. Comparing model answers before you trust one: The single strongest argument for an aggregator. Ask a factual or analytical question, then run it again on a different model and see where they diverge. Divergence is a useful signal that a question is harder than it looks — and you get it without paying three separate subscriptions.
2. Reading faster in a research-heavy job: Summarise a long article, a dense PDF or a conference talk on video, then follow up with questions against the same source. Analysts, students and anyone who processes more reading than they can finish are the natural audience.
3. Working across languages all day: Translate selections in place while browsing, translate whole PDFs, and draft replies in a second language. Because the assistant sits in the page rather than a separate app, the cost of a quick translation drops to near zero, which changes how often you bother.
4. Drafting and cleaning up writing: Generate a first pass from a template, then rewrite for tone. The humaniser and rewriting tools are aimed at output that reads less like a template — with the caveat about AI-detection claims covered in the limitations below.
5. Getting visuals without a design tool: Generate an image from a prompt, restyle an existing one, remove a watermark or extend a still into a short animation, all from the same place you were already working.
6. Automating repetitive browser work: Browser Operator is pitched at tasks that span several sites and repeat. Treat this as the newest and least independently validated part of the product, and note that it requires granting an extension the ability to act across sites.

How to use Monica

1. Install from the Chrome Web Store for Chrome or Edge, or download the desktop app for Windows and Mac, or the mobile app for iOS and Android. There is also Monica Code for VSCode and JetBrains if you want it in an IDE.
2. Create an account. The free tier works without payment but carries a daily usage limit, which the company states openly in its FAQ.
3. On any page, press Cmd+M or Ctrl+M to open the sidebar. This shortcut is the product's core interaction and worth committing to memory — everything else follows from it.
4. Pick a model for the task. Reasoning-heavy questions, quick summaries and image prompts have different best fits, and the point of the aggregator is that switching costs you nothing.
5. Work in context: select text to explain, translate or rephrase; upload a PDF or image to ask questions against; or paste a URL to summarise. Type / to pull a saved prompt from the library.
6. For longer jobs, move to the agent features — Deep Research for a compiled report, Slides Generation for a deck, or Monica Agent for a multi-step workflow. Check the output rather than trusting it; the terms themselves state the company is not responsible for inaccuracies produced by the AI.

Tips & Best Practices

• Match the model to the job, not to the hype. The whole value of an aggregator is cheap switching. Use it. If an answer feels thin, re-ask on a different model before concluding the question is unanswerable.
• Use it as a reading tool first. Summarisation and in-page Q&A are the most mature parts of the product and the ones with the least room for silent failure, because you have the source in front of you and can check.
• Build the prompt library early. The / recall is only useful if there is something in there. Saving five prompts you actually reuse pays for itself faster than exploring features you will not.
• Verify anything factual. The terms state outright that AI systems are probabilistic, may produce misunderstandings or errors, and that the company is not responsible for them. Treat every citation, figure and date as a claim to check.
• Know that outputs may carry a watermark. The terms say output may contain a "Made with Monica" watermark or other identification that is an inherent component of the system and cannot be removed at this time. If you are producing client-facing assets, test this before you commit.
• Read the billing terms before subscribing, not after. Subscriptions renew automatically at the then-current price, and payments for subscriptions and credits are final and non-refundable except where law requires otherwise. Set your own renewal reminder.
• If you are in the EU, UK or Turkey, you have 14 days. The terms grant consumers in those jurisdictions a statutory right of withdrawal within 14 days of purchase — the one broad exception to the non-refundable rule.
• Be deliberate about browser automation permissions. Browser Operator by design acts across multiple websites. That is a meaningful trust decision separate from deciding to use a chat assistant, and worth making consciously.
• Do not paste secrets. The privacy policy explicitly lists categories you should not submit, including biometric information, passwords to unrelated accounts, financial account credentials, precise geolocation and bank account details.

Who is Monica for?

• Heavy readers and researchers: Anyone whose day involves more articles, PDFs and reports than can realistically be read. Summarisation plus follow-up questions against the source is the core loop.
• People who want several models without several subscriptions: The cost argument is straightforward — one paid tier fronting multiple labs' models, against separate subscriptions to each.
• Multilingual workers and students: In-page translation, document translation and drafting in a second language, from an interface that itself runs in over twenty languages.
• Writers and marketers: Templated drafting, tone adjustment and rewriting, with image generation attached for when a post needs a visual.
• Developers: Monica Code brings the assistant into VSCode and JetBrains IDEs, and the chat side offers code generation, review-style suggestions and help searching GitHub and StackOverflow.
• Knowledge workers automating routine steps: The Agent, Browser Operator and Slides Generation features target people who repeat the same multi-site or multi-step process regularly.
• Not for under-18s: Worth stating plainly because the store ratings suggest otherwise. The terms require users to be of the age of majority in their place of residence and in any event not under 18, which is stricter than the 12+ App Store rating and the Everyone Google Play rating imply.

Platforms

• Browser extension for Chrome and Edge: The original and still the largest surface. The Chrome Web Store listing shows 3,000,000 users, a 4.9 rating from 32.2K ratings, a Featured badge, and platform notes that the publisher has a good record with no history of violations and follows recommended practices for Chrome extensions.
• Desktop for Windows and Mac: A downloadable app listed alongside the extension.
• iOS: Monica AI: Ultimate AI Assist requires iOS 15.1 or later, is a free download with in-app purchases, carries a 12+ rating, and holds a 4.72 rating from 6,662 ratings. First released July 2023; version 5.14.0 shipped in July 2026.
• Android: 4.2 stars from roughly 155,000 reviews in the 1M+ download bracket, rated Everyone with notes for Users Interact and In-App Purchases.
• IDEs: Monica Code for VSCode and JetBrains.
• Languages: The marketing site offers over twenty locales and the iOS listing declares 22 interface languages.

Note the rating spread across surfaces: 4.9 on Chrome, 4.72 on iOS, 4.2 on Android. All three are healthy, all three have real sample sizes, and the gap between the extension and the Android app is the kind of detail worth knowing before you judge the product by whichever number you saw first.

Pricing & Plans

There is a free tier and the company is straightforward about its shape: you can start using Monica for free, free users have a daily usage limit, and advanced features require upgrading. Paid plans exist alongside a credits system, and both appear in the terms.

This page does not quote prices, and that is deliberate rather than an omission. Monica's pricing page is rendered entirely on the client, so no plan names, amounts or credit allowances can be read from the page itself; publishing numbers from third-party review sites would risk being wrong or stale. What can be verified are the contractual terms, and those matter at least as much. Subscriptions bill monthly in advance and renew automatically at the then-current price unless cancelled, which you can do by email or from your profile page — cancelling does not refund the current period. Payments for subscriptions, credits and other paid features are final and non-refundable except where law requires otherwise, and the terms list four situations where a refund will not be considered at all: accounts restricted for policy violations, abuse or fraud; users who have already had a refund for something similar; purchases made with promotions, coupons or discounts; and requests made late or covering consumed credits. Consumers in the EU, UK and Turkey keep a statutory 14-day right of withdrawal. The company also reserves the right to change subscription fees at any time, with changes taking effect at the end of the current period after reasonable notice. Check the current rates in the app before subscribing.

Alternatives

• Sider is the closest direct competitor — an AI sidebar aggregating GPT, Claude, DeepSeek, Gemini and Grok, and it carries the same 4.9 Chrome Web Store rating.
• MaxAI and ChatHub occupy the same shelf, both rated 4.7 on the Chrome Web Store; ChatHub's angle is showing several chatbots side by side rather than switching between them.
• Going direct to each lab — ChatGPT, Claude, Gemini — gives you first-party features and the newest models on day one, at the cost of several subscriptions and no in-page integration.
• Perplexity is the alternative if research and cited answers are the main job rather than general assistance.
• Native browser AI in Edge and Chrome covers basic summarisation and drafting at no cost, with far less depth.

The honest framing: this is a crowded category where the leading extensions all rate above 4.5, so the choice usually comes down to which model roster, which pricing structure and which specific side-tools you need, not to a large quality gap.

Limitations & Considerations

• The vendor's own user numbers do not match the stores. The site advertises 10,000,000+ users and 160,000+ reviews. The Chrome Web Store shows 3,000,000 users and 32.2K ratings. These may count different things — total registered accounts across all platforms versus extension installs — but the site does not say, and the gap is roughly threefold on users and fivefold on reviews. Both figures are reported here rather than either being adopted.
• One of the two ratings the site advertises could not be verified. The site displays 4.9 on the Chrome Store and 4.6 on Product Hunt. The Chrome figure checks out exactly against the store. The Product Hunt figure could not be independently confirmed because the site blocked access, so it is not treated as established here.
• You depend on someone else's models. Because the product routes to third-party labs, model availability, pricing and behaviour are ultimately outside its control. A relevant user report on Google Play describes larger tasks producing server errors or freezing in Monica, while the same tasks completed normally when run directly against the same models at their source — a complaint about the aggregation layer, not the underlying models.
• Account suspension is a documented risk with real complaints attached. The terms allow the company, at its sole discretion, to deduct credits, suspend accounts temporarily or permanently, and ban Spaces. On Trustpilot, one reviewer reports paying annually and then being banned with only a generic "you violated TOS" email and no explanation; another describes suddenly triggering a terms violation without knowing what caused it. Read alongside the refund clause that excludes accounts restricted for policy violations, this is a combination worth understanding before paying annually.
• Trustpilot's score is bad but the sample is tiny. It stands at 1.6 from 30 reviews — barely above the threshold at which a score means anything, on an unclaimed profile where the platform notes the company has never invited customers to review, so it skews heavily toward the aggrieved. Set against 32.2K Chrome ratings at 4.9 and 155K Android reviews at 4.2, treat the low score as a catalogue of specific failure modes rather than a measure of typical quality.
• Outputs may be watermarked and cannot be un-watermarked. The terms state output may contain a "Made with Monica" watermark or other identification that is an inherent component of the system and cannot be removed at this time.
• The age requirement conflicts with the store ratings. The terms require users to be at least 18. The App Store rates the app 12+ and Google Play rates it Everyone. If you are deploying this for students, the contractual requirement is the binding one.
• US users are opted into arbitration by default. The terms bind US users to arbitration with a class-action waiver unless they opt out within the stated window.
• Data sharing is broader than the "we don't sell data" line suggests. The privacy policy says the company neither rents nor sells information in personally identifiable form to monetise through ads or leads — then lists sharing with third-party vendors, business partners, affiliated referring websites, government bodies on legal demand, and acquirers in a change of control. It also states explicitly that user information may be used to deliver targeted advertising in partnership with third-party ad vendors. Google Play's data safety section discloses sharing of personal and financial information with third parties. On the Chrome side, the store's own disclosure states the extension handles the following: personally identifiable information, financial and payment information, personal communications and user activity — while the developer declares the data is not sold to third parties outside approved use cases, not used for purposes unrelated to the item's core functionality, and not used to determine creditworthiness.
• The service itself can change or disappear at the vendor's discretion. The terms state that the company reserves the right to modify, suspend or terminate parts of the service at any time without prior notice, and grant users only a limited, non-exclusive, non-transferable, revocable licence to install and run the app on a single device they own or control, for personal use.
• Corporate ownership has been genuinely turbulent. In December 2025 Meta announced it had acquired Manus — the agent product from the same company — in a deal the Wall Street Journal reported at over $2 billion, with Meta stating it would wind down Manus's remaining operations in China and that there would be no continuing Chinese ownership interests. In April 2026 China's National Development and Reform Commission instructed the parties to withdraw the transaction, and in August 2026 Manus said it would soon resume operating as an independent company. During the separation, the company told some users they would need to back up data generated on or after 29 December 2025 to comply with regional regulatory requirements. None of this changed Monica itself, but it is a documented instance of regulatory action reaching into user data handling at this corporate group, and it belongs in any serious assessment of service continuity.
• Regional availability is not universal. Users on Google Play report a "registration not available in your area" error when attempting to sign up.
• The Trustpilot profile lists a location that matches nothing else. Its company details field says Isle of Man, while the site footer, the App Store, Google Play and the Chrome Web Store all point to a Singapore-registered company. Platform location fields are low-reliability, but the inconsistency is worth noting.

FAQ

Q1. Is Monica free?

There is a free tier, not just a trial. The company's FAQ states you can start using Monica for free, that free users have a daily usage limit, and that advanced features may require upgrading to a paid version. Paid plans bill monthly in advance and renew automatically.

Q2. Which AI models does it actually give me?

Models from several labs rather than its own. The site lists Claude, GPT, Gemini and Nano Banana variants as selectable options in one interface. The mobile listing names more, including DALL·E 3, Stable Diffusion, Flux, Recraft, Ideogram, Playground and Imagen for images, and Sora 2, SVD, Runway Gen-3 and Pika for video. Note that the specific version numbers advertised change frequently, so treat any published list — including this one — as a snapshot rather than a guarantee.

Q3. Does Monica build its own AI?

No, and it does not claim to. It is an aggregation and convenience layer: its own FAQ describes it as an extension powered by the GPT API, and its footer carries a notice that ChatGPT is a registered trademark of OpenAI OpCo, LLC. What it builds is the interface, the routing, the in-page integration and the tool layer around those models.

Q4. What platforms does it run on?

A Chrome and Edge browser extension, desktop apps for Windows and Mac, mobile apps for iOS and Android, and Monica Code for VSCode and JetBrains IDEs. The iOS app requires iOS 15.1 or later.

Q5. How well is it actually rated?

It depends where you look, and the differences are informative. The Chrome Web Store shows 4.9 from 32.2K ratings with a Featured badge and a publisher record the platform describes as having no history of violations. The App Store shows 4.72 from 6,662 ratings. Google Play shows 4.2 from roughly 155,000 reviews. Trustpilot shows 1.6 — but from only 30 reviews, on an unclaimed profile where the company has never solicited reviews. The three store figures rest on large samples; the Trustpilot figure does not.

Q6. Can I get a refund if I change my mind?

Generally no. The terms state that payments for subscriptions, credits and other paid features are final and non-refundable except where law requires otherwise, and list four categories where refunds will not be considered: accounts restricted for policy violations, abuse or fraud; prior refunds for similar products; purchases made via promotions, coupons or discounts; and late requests or those covering consumed credits. The significant exception is that consumers in the EU, UK and Turkey have a 14-day right of withdrawal. Cancelling a subscription stops the next renewal but does not refund the current period.

Q7. Can my account be suspended, and what happens to what I paid?

Yes. The terms permit the company, at its sole discretion, to deduct credits, suspend accounts temporarily or permanently, ban Spaces and take legal action in cases it deems abusive. Because the refund policy explicitly excludes accounts restricted for policy violations, a suspension can mean losing both access and the money already paid. Trustpilot carries reports of exactly this happening after an annual payment, with only a generic violation notice given.

Q8. Who owns Monica, and is the company stable?

Monica is published by BUTTERFLY EFFECT PTE. LTD., a Singapore-registered company listed identically as the developer on all three stores, with a Google Play address at 109 North Bridge Road, Funan, Singapore. CNBC reported that the same company created Manus and that the group raised a $75 million Series B led by Benchmark with Tencent and HongShan among backers, before relocating from Beijing to Singapore. Its recent history is eventful: Meta announced an acquisition of Manus in December 2025 at a reported $2 billion-plus, China's National Development and Reform Commission instructed the parties to withdraw the deal in April 2026, and in August 2026 Manus said it would soon return to independent operation. Monica continued running throughout, but anyone making a multi-year commitment should factor this in.

Q9. Is my data used for advertising or shared with anyone?

The privacy policy says the company neither rents nor sells information in personally identifiable form to monetise through ads or leads. It also states that user information may be used to develop and display targeted advertising, working with third-party vendors who do so, and lists sharing with vendors, business partners, referring affiliate sites, government bodies on legal demand, and acquirers in a change of control or bankruptcy. Google Play's data safety section discloses that personal and financial information may be shared with third parties. The policy also names categories you should never submit, including biometric data, unrelated account passwords, financial credentials and precise geolocation.

Q10. Is there a minimum age?

Yes, and it is higher than the app store ratings suggest. The terms require you to be of the age of majority where you live and, in any event, not under 18. The App Store rates the app 12+ and Google Play rates it Everyone, but those are content ratings, not contractual eligibility. For school or family use, the 18 requirement in the terms is the one that governs.