[Group Buy] How Many Extension

When I first started my FBA selling journey on Amazon, I often ran out of stock at the right time when it was selling well or imported too much, causing cash flow to be stuck. The main reason was that I could not know exactly the real inventory of my competitors, so all judgments were emotional and risky.

Everything only really changed when I used How Many Extension – a compact but extremely effective tool. In this article, I will describe my experience using How Many Extension and why you should buy this tool at RankMarket.

What is How Many Extension?

Since using How Many Extension, I have easily grasped the actual inventory of my competitors, from which my business strategy has become more accurate and proactive. If you are wondering “What is How Many Extension?”, let me briefly share.

How Many Extension is an extension for the Chrome browser, supporting Amazon sellers to accurately track their competitors’ FBA inventory. The strength of this tool is the ability to “break the limit of inventory display”. Simply put, this tool will show you the real quantity of goods in your competitors’ warehouse, even if they intentionally hide or conceal it.

Not only does it stop at displaying inventory, the tool also provides automatic reports, trend analysis and fluctuations over time. The interface is friendly, easy to use, very suitable for optimizing import, pricing and effective business strategies on Amazon.

Author/Company of How Many Extension

I am really impressed with the professionalism and constant updating spirit of the development team of this tool. How Many Extension was created by experienced experts in the field of e-commerce, first launched in 2016.

It is commendable that they do not stop at a simple extension, but always strive to improve from updating the 24/7 automatic ASIN tracking feature, to integrating powerful APIs for large businesses.

In particular, they also built a separate community on Slack to support users quickly and closely. This is a team that truly understands sellers, always putting the interests of customers as the top priority.

Key features of How Many Extension

After using How Many Extension for a while, I am really impressed with how this tool helps monitor the Amazon market more proactively and intelligently. Below are the features I have experienced and found extremely useful, especially when you are selling FBA, doing wholesale or arbitrage:

1. Limit Buster – Display the real inventory of Amazon competitors

This is the feature that I consider the most “worth the money” in How Many Extension. If you have ever sold on Amazon, you must have encountered a situation where the seller only displayed a few remaining units to create a sense of scarcity. But what is the reality?

With Limit Buster, you can:

• See the exact remaining quantity of each seller.
• Display the quantity of up to 999 units/product if the seller still has a lot in stock.
• Easily detect sellers who are “pretending to be out of stock”.
• This feature helps me accurately assess the level of competition, avoid being “led by the nose” by psychological tricks, and from there make more effective decisions on importing goods or adjusting selling prices.

2. Automatically track ASIN 24/7 – No need to manually check

Before, every morning I had to open a series of Amazon tabs to check the inventory of each product. This was very time-consuming. But since using How Many Extension, everything has completely changed.

With just 1 click to add ASIN to the tracking list, the tool will:

• Automatically update inventory every day.
• Display inventory fluctuations directly on the dashboard.
• Monitor continuously 24/7 without additional operations.
• This feature helps me save 1-2 hours every day, especially useful if you are an FBA seller or are doing arbitrage with many products that need to be managed.

3. Custom Dashboard & Smart Email Alerts

A big plus of How Many Extension is the extremely easy-to-use dashboard interface – intuitive information, quick operation.

The tool allows you to:

• View detailed data by each ASIN, seller or specific time frame.
• Receive email alerts when there are changes in reviews, inventory, BSR, number of sellers.
• No need to constantly open the software – but still not miss market fluctuations.
• Feel very secure when you are always updated promptly without having to keep your eyes on the screen all day.

4. Trend analysis with machine learning (AI)

How Many Extension does not stop at displaying data, it also helps predict the future based on AI analysis.

The tool will:

• Calculate product consumption trends.
• Early warning of the risk of “out of stock” if the inventory rate decreases rapidly.
• Make predictions based on reviews, selling prices, number of sellers and market data.

Since using this feature, I am more confident in planning to import goods, and I have avoided many times of “holding dead goods” due to importing too much.

5. Analyze reviews & ratings from real users

This is a feature that I highly appreciate when evaluating the reputation and potential of a product.

Specifically, the tool allows:

• Read real reviews from Amazon customers.
• Analyze the ratio of good/bad reviews over time.
• Avoid mistakenly importing low-quality products or products with many complaints.

For me, this is like a “magnifying glass” that helps to examine each product carefully, helping you make the right decision before importing or promoting the product.

How Many Extension Package and Pricing Comparison Table

At first, I was confused with the Advanced Inventory Insights and API Plans. But when I looked at each feature and price, I clearly saw that the $29.99/month plan was the most suitable. This is also the plan that RankMarket is currently offering.

Features	Advanced Inventory Insights Plan	Enterprise API Plan
Price	$29.99/month	$99.99/month (API access only, extra ASIN charges apply)
Manual Checks	Unlimited	Not applicable (automated via API)
Monitored ASINs	10 free included	Pay-per-ASIN (discounts for bulk)
Stock Transparency	View up to 999 units even if seller limits are applied	✔️
Chrome Extension	Shows real-time inventory in Buy Box and per seller	✔️
24/7 Monitoring	Automated, always-on tracking	✔️
ASIN Trend Reports	Daily reports + Email alerts (BETA)	✔️
Stock Limit Detection	Detect when and how sellers limit stock	✔️
API Access	❌	✔️ (Full access)
System Integration	❌	✔️ Integrate with internal tools via API
Target Users	Individual sellers, small businesses	Enterprises, large-scale sellers
Support	Standard	Premium Slack channel with expert assistance

Recommended Use:

• Advanced Inventory Insights Plan is suitable for individuals or small teams who want to track inventory and seller performance on Amazon without API integration.
• API Plan is for large enterprises or dropshipping experts who need to monitor a large number of ASINs and integrate deeply with their own systems.

How much does it cost to buy How Many Extension at RankMarket?

Myself and many friends have tried to buy directly from the homepage, but the high cost and complicated procedures made me hesitate. In the end, I chose RankMarket because of its reasonable price, easy to buy, and enthusiastic support – completely worth a try.

While the official price of the How Many Extension Advanced Inventory Insights Plan on the homepage is $29.99/month, at RankMarket, we offer a package with full features but at a much cheaper cost. You can own a full 12-month package for only $60

Why should you buy How Many Extension at RankMarket?

There are many places selling Amazon tools, but this is one of the reasons why the user community always trusts RankMarket.

• Best price on the market: more than 80% off compared to buying directly. With the same function, there is no reason to pay 5-6 times more.
• Fast activation: I received the key within 15 minutes of payment, so there was no need to wait like when buying on the official website.
• Dedicated customer support: We are always there for you and ready to support you whenever you need it.
• Convenient payment: You can choose the appropriate payment method
• Warranty support: 100% money back guarantee if the tool fails and cannot be used

Instructions on how to buy How Many Extension at RankMarket

You can follow these steps to buy a cheap account at RankMarket.

• Visit the RankMarket website.
• Find the How Many Extension Advanced Inventory Insights Plan package.
• Select payment
• Enter your email for RankMarket to activate.
• Complete payment via bank transfer/Momo/domestic wallet.
• Receive the link and activation code, log in at app.howmanyextension.com, or install the extension.
• Please activate your account and start using it right away.

Who should use How Many Extension?

After a period of experience, I find that the following groups of people will be very suitable for this tool:

• FBA sellers who sell wholesale or retail on Amazon need to know the real inventory of competitors to plan to import goods, to avoid running out/of stock.
• People doing online arbitrage or wholesale arbitrage need to closely monitor inventory fluctuations to buy at the right time and avoid wasting capital.
• Agencies managing multiple FBA accounts need to report inventory, reviews, prices, and daily fluctuation alerts.
• Businesses with import sourcing teams need to predict hot trends and avoid excess imports using machine learning forecasts.

Pros and cons of How Many Extension

No tool is absolutely perfect, but it is important to clearly understand the strengths and points you need to pay attention to when using it. Here are the pros and cons that I have summarized

Pros

• Save time: Previously, instead of spending hours manually checking inventory. With 24/7 automated tracking, everything is now updated without you having to lift a finger.
• Detailed data: The Limit Buster feature helps you see real-time inventory levels, which other tools can’t do.
• Friendly interface: The dashboard is easy to use, and the figures are clearly presented, helping you quickly grasp information without digging deep.
• Decision support: Thanks to the machine learning trend analysis, you can avoid importing goods at a time when the market is saturated, saving a lot of costs

Cons

• Limited number of free ASINs: The Advanced Inventory Insights package only allows tracking 10 free ASINs. If you need to track more products, the cost will increase.
• Not optimized for markets other than Amazon: The tool focuses entirely on Amazon, so if you do business on other platforms like eBay, it won’t be very useful.

Beta forecasts may be inaccurate in the case of unpredictable market fluctuations.

How Many Extension Works

You are wondering: How does this tool know other people’s inventory? The answer is: through “Limit Buster” technology and a smart ASIN tracking system.

How Many Extension works by integrating directly into the Amazon product page via the Chrome extension. When you click on an ASIN in the extension, the tool will “crack” the display limit that the seller intentionally set. You will see each seller’s real inventory. This is the core feature that I highly appreciate.

After adding ASIN to the dashboard, the tool will automatically check again every 24 hours. You don’t need to do anything; the system will automatically update and synthesize the data. The data is collected in the dashboard; you need to open it every day to see the quantity, reviews, prices, and fluctuations. There are even alerts sent via email if there are sudden changes.

After a long enough period of monitoring, the tool will analyze the trend to predict when the ASIN will be out of stock, helping you prepare your goods early.

How to use How Many Extension: Step by step

To use How Many Extension, follow these steps:

• Download the extension: Go to the Chrome Web Store, search for “How Many?” and click “Add to Chrome”.
• Log in: Use the login information from your RankMarket account or the How Many Extension homepage.
• Go to Amazon: Open Amazon.com and find the product you want to analyze.
• Use the Limit Buster button: On the product page, click the How Many Extension button to see detailed inventory quantities.
• Add to watchlist: Under “Product Monitor”, click “Manage Product” and add the ASIN of the product you want to monitor.
• Check reports: Go to “Reports” to see trends and reports on inventory, reviews, and ratings.
• Set up alerts: Go to “Settings” to enable email alerts for ASIN changes.
• Use the API (if needed): If you are using the API Plan, go to “API Documentation” to get the token and integrate the data into your system.

FAQs

• What is How Many Extension, and what can it do for FBA sellers?

  How Many Extension is an Amazon inventory tracking plugin installed on the Chrome browser. This tool helps you see the real inventory of your competitors, even if they limit their visibility on Amazon FBA. In addition, it automatically tracks 24/7 and sends alerts about product fluctuations via email.

• How does this tool work to “uncover” real inventory?

  How Many Extension uses Amazon extension limit buster technology to detect real inventory, even if the seller limits sales? The tool then uses a smart dashboard and Amazon inventory tracker to display real-time data and forecast future trends.

• Does the How Many Extension track automatically, or do you have to check it manually?

  You don’t need to check manually at all. The tool has a 24/7 ASIN auto-monitoring feature, helping you track products, reviews, sellers, prices, and BSR. These are all updated daily and displayed on the FBA seller dashboard insights.

• Will Amazon ban you if you use the How Many Extension?

  Up to the time I used it, How Many Extension was completely safe. The tool only reads public data from Amazon, does not interfere with the account, or perform any dangerous actions. However,

  You should always be careful and avoid overusing other automation tools.

• Is How Many Extension available on platforms other than Amazon?

  No, this tool only supports Amazon. If you do business on eBay or Shopee, you will need other tools.

• How do I know if RankMarket sells genuine licenses?

  RankMarket provides valid login information and supports the latest version updates, ensuring you use genuine tools.

• Are there any limitations to the Advanced Inventory Insights package?

  This package allows unlimited inventory checks but only tracks 10 ASINs for free. If you need more, you will pay an additional fee.

Conclusion

If you are selling FBA on Amazon and feel confused about your competitors’ inventory, do not know how much is reasonable to import, or want to save time checking ASINs every day, then How Many Extension is the tool you need.

How Many Extension helps you display real inventory, track ASINs automatically 24/7, send email alerts, and predict trends with AI. This is a clear advantage for FBA sellers, from online arbitrage to wholesale, or for beginners.

Buy at RankMarket, you enjoy prices up to 80% cheaper than the genuine, dedicated support, quick activation, and transparent warranty policy.