📱Overview
StampCal helps post office clerks and convenience store staff quickly find the best postage stamp combinations when exact denominations aren't available. Whether you're at 7-Eleven selling stamps or managing a busy postal counter, our smart calculator minimizes customer overpayment while considering your current inventory.
✨Key Features
🎯 Instant Postage Solutions
Calculate the best stamp combination in seconds, minimizing customer overpayment while ensuring accurate postage coverage.
📊 Multiple Strategy Options
Choose between least overpayment for customer satisfaction or fewest stamps for faster service during rush hours.
🏪 Real-Time Inventory Tracking
Set stock limits for each denomination to ensure suggested combinations match your actual stamp availability.
🌍 Global Postal Systems
Supporting 15 countries including USA, Germany, Japan, and France. Automatically handles different currencies and postal rate structures.
🚀Real-World Example
Common scenario: Customer needs €2.90 for international letter postage
Your stamp inventory: €1.00, €0.70, €0.20, €0.10
🏪Perfect for Your Business
Convenience Stores
Speed up postal service at your counter. When customers need specific postage amounts for packages or international mail, quickly provide accurate stamp combinations without manual calculation errors.
Post Offices
Handle complex postage requirements efficiently during peak hours. The app's inventory management feature ensures you only suggest stamps you have in stock, reducing customer wait times.
Individual Users
Planning to mail multiple items? Calculate all your postage needs at once, knowing exactly which stamps to buy for minimal total cost.
📱App Screenshots
💰Pricing
Free Version
- ✓ Up to 9 calculations per day
- ✓ All basic features available
- ✓ All languages supported
Premium Version Popular
- ✓ Unlimited calculations
- ✓ No ads
- ✓ Priority support
- ✓ Priority access to future features
🌟Advanced Capabilities
⚡ Lightning-Fast Processing
Complex stamp combinations calculated instantly. No waiting time, immediate optimal solutions for any postal calculation.
📱 Offline Operation
No internet connection required. Works reliably in any environment regardless of Wi-Fi or cellular network availability.
🔒 Privacy Protection
No personal data collection. Store sales data never transmitted externally. Complete privacy for business operations.
🌐 International Standards
Supports postal systems from 15 countries. Compatible with US, European, Asian, and other international stamp systems.
Why Industry Professionals Choose StampCal
- ✅ Enhances postal service efficiency for post office staff
- ✅ Streamlines stamp sales at convenience stores and retail locations
- ✅ Improves customer service at bookstores and stationery shops
- ✅ Perfect for stamp collectors managing their collections
- ✅ Simplifies postal calculations for general users and businesses
- ✅ Reduces customer wait times and improves transaction speed
- ✅ Minimizes calculation errors in high-volume retail environments
❓Frequently Asked Questions
What is a stamp combination calculator?
A stamp combination calculator helps postal workers and customers find the optimal mix of available stamp denominations to reach exact postage amounts. StampCal's intelligent algorithm calculates stamp combinations instantly, minimizing overpayment.
How does postal stamp combination work?
When you need specific postage but don't have the exact denomination, our app calculates which stamps to combine. For example, to make $2.90 postage, it might suggest using two $1.00 stamps plus one $0.70 and one $0.20 stamp.
Can I calculate postage stamp combinations for international mail?
Yes! StampCal supports postal systems from 15 countries. Whether you're calculating stamp combinations for domestic or international postage, the app handles different currencies and postal rate structures automatically.
📲System Requirements
- 📱 iOS 15.0 or later
- 📲 iPhone and iPad compatible
- 🌐 Offline support