When I first started my FBA journey on Amazon, I often found myself in tricky situations: either my hot-selling products suddenly went out of stock, or on the flip side – I overstocked and had cash tied up. The main reason was that I couldn’t clearly see the real inventory levels of my competitors. Every decision was based on guesswork, which carried a high risk.
Everything really changed when I started using How Many Extension – a lightweight yet extremely powerful tool. In this article, I’ll share my real experience with How Many Extension and why you should definitely buy this tool at Imglory.
What is How Many Extension?
Since installing How Many Extension, I’ve been able to accurately track my competitors’ inventory, which allows me to make smarter and more proactive business decisions. If you’re wondering “What is How Many Extension?” here’s a quick answer:
How Many Extension is a Chrome extension that helps Amazon sellers track the exact stock levels of their competitors’ FBA inventory. Its standout feature is the ability to “break the inventory display barrier.” In simple terms, even if a seller tries to hide stock levels, you can still see exactly how many units they have left.
Beyond just showing stock counts, How Many Extension also provides automated reports, trend analysis, and real-time monitoring. Its user-friendly interface makes it extremely practical for optimizing purchasing plans, pricing strategies, and scaling your Amazon business effectively.
How Many Extension Team / Developers
What impressed me the most is the professionalism and continuous improvement from the development team. How Many Extension was created by a group of e-commerce experts and first launched in 2016.
They didn’t stop at just making a basic extension. They consistently upgraded features like 24/7 ASIN tracking and API integration for large-scale businesses. They even maintain a dedicated Slack community for quick support. This shows they truly understand seller , I was genuinely surprised at how How Many Extension makes tracking Amazon markets more scientific and proactive. The most valuleneeds and put customer value first.
Key Features of How Many Extension
After using it for a whileab features I’ve found include:
1. Limit Buster – Reveal Competitors’ True Amazon Stock
This is the feature I consider the most “worth every penny.” If you’ve sold on Amazon, you’re familiar with competitors showing only a few units to create a false sense of scarcity. But what’s the truth?
- See the real inventory of any seller.
- Displays up to 999 units per product if available.
- Easily detect fake “low stock” tactics.
This helps me correctly assess competition, avoid psychological traps, and make precise purchasing and pricing decisions.
2. Automated 24/7 ASIN Monitoring – No Manual Work
I used to spend mornings opening multiple Amazon tabs to check ASINs – a huge time drain. Now, I simply add products to my watchlist and the tool:
- Automatically updates inventory daily.
- Shows stock changes directly on the dashboard.
- Monitors continuously 24/7 without manual input.
This saves me 1–2 hours a day, especially useful for managing multiple FBA products or arbitrage.
3. Custom Dashboard & Smart Email Alerts
I love the dashboard in How Many Extension – clean, intuitive, and quick. The tool allows you to:
- View detailed data by seller, ASIN, or time range.
- Receive email alerts for major changes in stock, reviews, BSR, or seller counts.
- Stay updated without constantly watching your screen.
4. AI-Powered Trend Analysis
How Many Extension doesn’t just show numbers – it uses machine learning to forecast trends:
- Analyze product sell-through rates.
- Warn early about potential stock-outs.
- Make predictions based on market, seller, price, and review data.
This gives me confidence when planning purchases, avoiding overstocking mistakes.
5. Review & Customer Rating Analysis
Another great feature for evaluating product potential:
- View real Amazon customer reviews.
- Analyze positive/negative ratios over time.
- Filter out low-quality products early.
For me, it’s like a “magnifying glass” to carefully examine each product before sourcing or scaling campaigns.
Pricing & Plans Comparison
I was initially torn between the Advanced Inventory Insights and API Plan. After careful review, the $29.99/month plan turned out to be the best fit – and it’s the exact one Imglory offers.
| Feature | Advanced Inventory Insights | API Plan |
|---|---|---|
| Price | $29.99/month | $99.99/month + ASIN fees |
| Manual Checks | Unlimited | Unlimited |
| Free ASIN Monitoring | 10 | Unlimited (with fee) |
| Product Stock Display | ✅ Up to 999 units | ✅ |
| Stock by Seller | ✅ (via Chrome) | ✅ |
| Automated 24/7 Monitoring | ✅ | ✅ |
| Daily Reports & Alerts | ✅ (email & dashboard) | ✅ |
| Stock Limit Detection | ✅ | ✅ |
| API Access | ❌ | ✅ |
| Bulk Monitoring | ❌ | ✅ (discounted) |
| Premium Support | ❌ | ✅ (via Slack) |
Recommendation:
– Advanced Inventory Insights: Best for individuals or small groups tracking competitor stock.
– API Plan: Ideal for enterprises or pro dropshippers monitoring large-scale ASINs.
How Much Does How Many Extension Cost on Imglory?
Many people buy directly from the official site – but prices are higher and the process is cumbersome. Personally, I chose Imglory for its affordable price, simple purchase process, and fast support – totally worth it.
While the official How Many Extension Advanced Inventory Insights plan costs $29.99/month (~$360/year), at Imglory you can get the full package for just $61/year.
Why Buy How Many Extension at Imglory?
- Best market price: Up to 80% cheaper than buying directly. Same features, far lower cost.
- Fast activation: Get your key within 15 minutes.
- Dedicated support: Always ready to assist if you face issues.
- Flexible payment: Multiple methods available to suit your needs.
- Safe warranty: 100% money-back guarantee if the tool fails to work.
How to Buy How Many Extension at Imglory
Follow these steps to grab your discounted account from Imglory:
- Visit the Imglory website.
- Select the How Many Extension Advanced Inventory Insights Plan.
- Proceed to checkout.
- Enter your email for activation details from Imglory.
- Complete payment via bank transfer, PayPal, or local wallet.
- Receive the link and activation code, then log in at app.howmanyextension.com or install the extension.
- Activate and start using right away.
Who Should Use How Many Extension?
Based on my experience, the following groups benefit the most from this tool:
- FBA sellers on Amazon – both wholesale and retail – to monitor competitors’ stock and avoid running out or overstocking.
- Online and wholesale arbitrage sellers tracking stock changes for better timing and lower risk.
- Agencies managing multiple FBA accounts, needing detailed reports on stock, reviews, prices, and daily alerts.
- Enterprises with sourcing teams predicting product trends and reducing excess stock thanks to AI forecasts.
Pros & Cons of How Many Extension
No tool is perfect, but knowing strengths and weaknesses helps you maximize value. Here’s my breakdown:
Pros
- Saves time: Automated 24/7 tracking replaces hours of manual stock checking.
- Accurate data: Limit Buster reveals real stock levels – a feature most tools lack.
- User-friendly: Intuitive dashboard makes insights easy to understand.
- Better purchasing decisions: Machine learning forecasts help avoid saturated products and wasted costs.
Cons
- ASIN limit: Advanced Inventory Insights allows only 10 free ASINs. More requires extra fees.
- Amazon-only: Not useful for other platforms like eBay or Shopee.
- Forecast accuracy: Still in beta, predictions may vary during volatile markets.
How Does How Many Extension Work?
You may wonder: how does this tool uncover real stock?
The answer lies in Limit Buster and smart ASIN tracking.
How Many Extension integrates directly into Amazon product pages via Chrome. When you click an ASIN, it bypasses display limits and shows true stock by seller – its most valuable feature.
Once added to the dashboard, the system auto-checks every 24h and updates data including stock, prices, reviews, and BSR. Email alerts notify you of sudden changes.
Over time, it analyzes trends and forecasts when an ASIN will sell out, giving you an edge to restock before competitors.
Step-by-Step Guide to Using How Many Extension
- Install: Go to Chrome Web Store, search “How Many?” and click Add to Chrome.
- Login: Use credentials from Imglory or the official site.
- Open Amazon: Visit the product page you want to analyze on Amazon.com.
- Use Limit Buster: Click the extension button to reveal true stock.
- Add to monitoring: In “Product Monitor,” choose “Manage Product” and add the ASIN.
- View reports: Open “Reports” to check inventory trends, reviews, prices, rankings.
- Set alerts: Enable email notifications in “Settings” for sudden changes.
- Use API (optional): With the API Plan, generate a token in “API Documentation” for integration.
FAQs
- What is How Many Extension and what does it do?
It’s a Chrome extension that lets FBA sellers see competitors’ real stock, even if they try to hide it. It also supports 24/7 monitoring and email alerts.
- How does it detect real stock?
It uses Limit Buster technology to reveal stock, then combines dashboard data and ASIN tracking to deliver real-time numbers and forecasts.
- Do I need to check manually?
No. It tracks ASINs automatically 24/7, updating stock, reviews, prices, sellers, and more right on the dashboard.
- Will Amazon ban me for using it?
In my experience, it’s safe because it only reads public data, not interfering with your account. Still, avoid running too many automation tools at once.
- Does it work outside Amazon?
No. It’s optimized only for Amazon.
- Is it genuine when bought from Imglory?
Yes. Imglory provides official accounts, updates, and secure access.
- What are the limits of the Advanced Inventory Insights plan?
You get unlimited manual checks but only 10 free ASINs for monitoring. More require extra payment.
Conclusion
If you’re selling FBA on Amazon and struggling with competitor stock tracking or wasting hours checking ASINs manually, How Many Extension is the tool you need. A huge advantage for both seasoned and beginner FBA sellers.
Especially when you buy at Imglory, you’ll get the full package for just $61/year, up to 80% cheaper than the official price – plus fast support and clear warranty.


