# Online Auction Calculator — Auction Math Made Simple

> Auction Math Made Simple (iPhone/iPad app by James Kirwin.)

- Source: https://appshunter.io/ios/app/online-auction-calculator/id6753123185 (this page in markdown: same URL + `.md`)
- Developer: [James Kirwin](https://appshunter.io/developer/1842603183)
- Category: Finance, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 7 MB
- Languages: American English
- Released: 2025-10-05
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/online-auction-calculator/id6753123185/reviews.md

## What is Online Auction Calculator?

Know your real auction cost before you bid.
Auction Calculator is a fast, simple tool that shows the true cost of winning an auction — before buyer’s premium, tax, shipping, and card fees turn a good deal into a bad one.
Domestic U.S. Auctions
• Buyer’s premium calculations
• Sales tax estimates
• Shipping & handling
• Credit card / PayPal fees
Foreign & International Auctions (One-time $3.99 unlock)
• Real-time foreign exchange rates
• Automatic USD conversion
• Import tariff estimates
• Avoid surprise fees from FedEx, DHL, and UPS
• Supports EUR, GBP, JPY, CAD, AUD, CHF, and more
Designed for collectors who bid seriously — coins, antiques, art, and collectibles — and want clear numbers without subscriptions or ads.
No advertising. No tracking. No subscriptions.
One app. One purchase. Total transparency.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock Non-US Auctions | $3.99 | one-time |



## Version history (last 3 releases)

### 1.4 — 2026-01-02

- Updated iPad format
- Updated screenshots
- Ui/ux tweaks

### 1.3 — 2025-10-28

• Added sponsor integration
   • UI improvements for better scrolling
   • Bug fixes and performance improvements

### 1.2 — 2025-10-05

No release notes.

## More apps by James Kirwin

- [GrowZone](https://appshunter.io/ios/app/growzone/id6755212815)
- [Penfolio Fountain Pen Archive](https://appshunter.io/ios/app/penfolio-fountain-pen-archive/id6757254203)
- [TempusArchive — Watch Tracker](https://appshunter.io/ios/app/tempusarchive-watch-tracker/id6758554600)

All apps by James Kirwin: https://appshunter.io/developer/1842603183

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-17.*