Sometimes when shopping, we encounter the same product in different presentations (sizes, quantities) and may automatically think that the bigger or more expensive is the best deal. That is in fact not always the case. The real best deal is often hidden in plain sight. I used to pull out my phone and do the math manually, it always worked but it was tedious. So I coded a quick and ugly web app1 formyself to make it easier. Now, I’ve refined it into something simple and fast and free, in order to share it with everyone.
The Best Deal Isn’t Always Obvious
Retailers offer products in all kinds of sizes, bundles, and quantities, giving shoppers plenty of options. But the best value isn’t always the biggest package or the one on sale, it’s the one that gives you the most for your money. The problem? Most of us don’t have time to compare prices per weight, sheet, or serving while shopping.
That’s where this tool comes in. Just enter the product details, add the different options you’re considering, and let the app highlight the true best value. It’s not about avoiding bad deals, it’s about spotting the hidden savings that add up over time.
👉 ComparaPrecios - Find the best value when shopping
How It Works? Super Simple
- Name your product (e.g., "coffee," "laundry detergent," "protein bars").
- Add the options you’re comparing (price + size/quantity).
- See the winner. ComparePrice instantly calculates and highlights the best value per unit.
No ads. No sign-up. No hidden fees. Just a quick, clear answer so you can shop smarter without the hassle.
Example: Which Toilet Paper Deal Saves You Money?
| Option | Price | Units | Cost per unit |
|---|---|---|---|
| Small (4-roll) | $3.99 | 4 | $0.9975 ✅ |
| Medium (6-roll) | $8.99 | 6 | $1.4983 |
| Large (12-roll) | $12.49 | 12 | $1.0408 |
Without knowing this, you might grab the Large 12-roll package, and pay more for unit.
Now imagine applying this to groceries, cleaning supplies, pet food, or even tech accessories. The savings add up fast.
Who Needs This?
- ✅ Budget-conscious shoppers: Stretch every cent further.
- ✅ Busy parents: Quickly compare diapers, snacks, or school supplies.
- ✅ Meal preppers & bulk buyers: Avoid "fake discounts" on large quantities.
- ✅ Students & young professionals: Save on essentials without clipping coupons.
- ✅ Eco-friendly consumers: Find the best value without overbuying.
Features That Make Shopping Smarter
Compare Unlimited Options
Whether you're choosing between 2 sizes2 or 10 different package options, add as many presentations as you need. Delete the ones you don't. The interface adapts automatically.
Works for Anything Measurable
Groceries. Cleaning supplies. Pet food. Office supplies. If it has a price and a quantity, you can compare it. Switch seamlessly between units (kilograms to grams, liters to milliliters) no conversion headaches.
Beautiful, Accessible Design
Clean, modern interface with smooth animations and thoughtful details:
- Dark mode & light mode: automatically matches your system preference
- Bilingual: Full English and Spanish support with automatic language detection
- Mobile-optimized: Perfect for quick comparisons while holding your shopping basket
- Keyboard-friendly: Navigate and compare without touching your mouse
Your Data Stays Yours
All calculations happen in your browser. No tracking. No data collection. No servers storing your shopping habits. Just pure, private utility.
Are you looking to build your own product?
Need a custom tool like this one for your business or personal use? Whether it’s a time-saving web app, a smart calculator, or a niche solution to solve everyday problems, I can build it for you, fast, clean, and tailored to your needs. I specialize in turning simple ideas into powerful, user-friendly tools that work seamlessly. If you’ve got a project in mind (or just a problem you’d love to automate), let’s talk and make it happen.