About us
About HarnDuay
HarnDuay is a web app built to make shared expenses easier to settle without spreadsheets or awkward manual calculations.
What HarnDuay is for
HarnDuay helps friends, families, teams, and travel groups split expenses when each person pays or consumes a different amount.
It is useful for restaurant meals, shabu, barbecue, parties, travel, and team reimbursement scenarios.
Product intent
We focus on clear calculations, readable summaries, and practical features such as VAT, service charge, and shareable results.
The content across the site is based on common restaurant, travel, and group-expense situations instead of generic articles detached from the calculator.
How we maintain the product
HarnDuay reviews formulas and page copy when tax assumptions, browser behavior, or sharing features change, so the calculator stays practical for real receipts.
Users can report unclear instructions or calculation examples that do not match their receipt by emailing [email protected] with the page and a short example.
Common mistakes
- Forgetting to separate items some people did not consume, such as desserts, drinks, or add-ons.
- Splitting VAT and service equally even when food totals differ a lot.
- Not marking who paid up front, which causes the reimbursement summary to point to the wrong person.
Tips for faster bill splitting
- Add everyone first, then enter receipt items to reduce backtracking.
- Use the duplicate action when your receipt has several similar lines.
- Combine quantity with split weights when one item has uneven portions.
Try it with your real receipt
Add your friends, enter receipt items, adjust VAT or service charge if needed, and share the final summary link instantly.