The problem
Many coin-scan apps promise fortunes. They show huge price ranges without saying where the numbers come from — then ask for a subscription. A real estimate means a method, sources and an honest range.
How it works
Guidance tuned for reflective metal.
Country, year, denomination, metal, mint.
Metal spot prices, online listings, collector value ranges — sources shown.
What CoinROI does
- Search inside the community Numista catalog
- Value ranges with sources shown
- Buy/sell tracking
- Real collection management: local photos, subcollections, filters
What it doesn't do
- Replace a professional numismatist
- Promise a price — a photo is not a grade
- Lock you into a subscription
Price
- Free to download, scan and organize your collection
- Prepaid credits for AI analysis and Numista searches — packs from $0.99
- BYOK: your own OpenAI/Anthropic API key, billed by your provider
- No subscription
Made in France
CoinROI is built by a two-person team in Castanet-Tolosan, near Toulouse. Made for French and European collectors: French and overseas issues, euro coins, inherited collections.
Contact: contact@obviousidea.com
FAQ
What is CoinROI?
An iPhone/iPad app to scan and estimate coins with sourced values.
How much does it cost?
Free to download; AI analysis and Numista searches use pay-as-you-go credits; no subscription.
Where do the values come from?
Metal spot prices, online listings, market comparables and the community Numista catalog — shown as ranges, with sources.
Is CoinROI related to coinroi.com?
No. coinroi.com is an old investment site, unrelated to the app or ObviousIdea.