CoinCatalogApp tests coin reference apps for international collectors who need equal coverage of Canadian, British, Australian, and European coins — not US-centric databases.
Who We Are
Two of us inherited mixed international collections: one had Canadian cents and pence from a British relative; the other collected Australian sovereigns and Mexican pesos. When we tried to use popular US coin databases, we hit a wall. Canadian coins were either missing or listed with outdated values. British coins were sparse. Australian and European series got three lines or nothing. We realized the problem wasn't our apps — it was that most catalog apps are built for US collectors, by US collectors. We started testing apps against the coins we actually owned, and we haven't stopped.
Our editorial perspective is simple: a catalog app that works well for US quarters but stumbles on Canadian toonies or British florins is not a good catalog app. We test every app the same way — by seeing whether it treats an international coin with the same rigor, pricing data, and historical detail that US collectors expect for Morgan dollars.
Methodology
We test coin reference apps against 35 coins spanning six countries and three centuries. Our standard test set includes: Canadian Beaver dollars, Canadian quarters (post-1968), Canadian one-cent pieces; British florins, British shillings, British pennies; Australian sovereigns, Australian shillings, Australian sixpences; Mexican pesos, Mexican centavos; US coins for baseline comparison (Lincoln cents, Mercury dimes, Morgan dollars). Each app gets between 50 and 100 hours of testing over six to eight weeks. We search for each coin series, check whether the app shows regional variants, note the completeness of mintmark coverage, and record whether pricing data exists.
We evaluate three core dimensions: (1) whether a catalog app gives Canadian, British, Australian, and European coins equal table space and equal pricing data as US coins; (2) how the app handles variety and mintmark awareness — whether it accepts 'I cannot tell which variant' and still shows a range, or whether it forces a yes-or-no guess; (3) data freshness and accuracy against known reference sources. We re-test each app after major updates or when new coin data becomes available.
Our Standards
We believe Canadian coins deserve more than a checkbox. When we test a catalog app, we start by asking: does this app give a Canadian quarter the same variety coverage, mintmark breakdown, and pricing detail that a US quarter gets? If the US cent has three variants listed and the Canadian cent has one, that tells us the app was built with a US bias. We look for native Canadian grading and pricing — not just conversions from US values. The same standard applies to British, Australian, and European coins. A strong catalog app should make an Australian collector feel as well-served as a US collector. We also score apps on how they handle the moments when a collector genuinely cannot tell which variety they have. Does the app accept that uncertainty and show a price range? Or does it force a guess and then penalize you with false precision?
Disclosure
We do not accept paid placement or demo access — we buy or download every app we test, using the same tools a collector would use; we do not test apps that treat Canadian coins as a regional afterthought or that show mintmark data for US coins but not for Commonwealth nations; we do not claim expertise in every world coin specialty beyond our test set, and we acknowledge that Asian and African numismatics require deeper knowledge than we bring to this table.
Contact
If you develop or maintain a coin catalog app and would like us to review it, contact us via the site contact form. We also welcome suggestions for which coin series or countries we should test next.