The Privacy-First, Universal Discount Calculator for Smart Shoppers. Works on Amazon, Flipkart, Zomato, Swiggy, and 100% of the web.
Online stores love to trick you. They scream "50% OFF" in big letters but hide a tiny "Up to ₹50" cap in the fine print.
- The Trap: You think you're saving half the price.
- The Reality: You're saving barely 5%.
Discount Detective is a manual utility that sits in your browser's Side Panel. It helps you instantly verify the real value of any coupon or deal by accounting for hidden caps and shipping fees.
It works everywhere:
- 🛒 E-commerce: Amazon, Flipkart, Myntra, Ajio, Nike.
- 🍔 Food Delivery: Zomato, Swiggy, EatClub.
✈️ Travel: MakeMyTrip, Cleartrip.
- Universal Compatibility: Since it relies on your input, it works on literally any website.
- 🚫 Privacy-First: No trackers. No ads. No data collection. The extension works 100% offline and never reads your website data.
- 🧮 Smart Calculation: Instantly reveals the "Effective Discount Percentage" after caps are applied.
- Sidebar Support: Keep the calculator open side-by-side while you browse different tabs.
- Open the Extension: Click the icon in your toolbar or open the Chrome Side Panel.
- Input the Deal:
- Original Price: (e.g., ₹500)
- Discount %: (e.g., 60%)
- Max Cap: (e.g., ₹120 - This is the most important field!)
- See the Truth: The calculator will show you the Real Savings.
Example: A 60% OFF coupon with a ₹120 cap on a ₹500 order is only a 24% discount. We do the math so you don't get tricked.
We believe in radical transparency.
- No Data Collection: We do not track your browsing history or personal data.
- No Remote Code: The extension runs entirely on your device (Client-Side).
- No Permissions: We do not request access to read your website content.
If you want to run the code from source:
- Clone this repository.
- Open Chrome and go to
chrome://extensions. - Enable Developer Mode (top right).
- Click Load Unpacked.
- Select the folder where you cloned this repo.
Found a bug? Want to add a feature?
- Fork the Project
- Create your Feature Branch (
git checkout -b feature/AmazingFeature) - Commit your Changes (
git commit -m 'Add some AmazingFeature') - Push to the Branch (
git push origin feature/AmazingFeature) - Open a Pull Request
Built with ❤️ by a solo developer to help you save money.
☕ Buy me a coffee