CoinDatabaseApp tests coin reference apps for collectors who need to distinguish Proof from SMS from Specimen strikes — not just see a photo ID and move on. We score databases on whether they handle the rare-strike scenarios that matter most to serious hobbyists.
Who We Are
Three of us came to this work the hard way. One inherited a box of mixed coins and discovered that generic 'look-up' apps could identify a Lincoln cent but couldn't tell you whether it was business strike or Proof — which meant the value estimate was off by a factor of ten. Another spent two years building a personal collection and realized that most apps treat strike classification as a checkbox, not a searchable field. We started testing databases side by side to find which ones actually support the granular work that collectors do.
Our mission is to help you choose a coin database app that doesn't make you guess about strike type, variety, or grade range. Most database reviews online are feature listicles written by people who've never used an app for more than an hour. We use these databases as working tools, updating our test set every quarter and re-testing after major releases.
Methodology
We test each coin database app against a fixed set of 34 coins across five distinct categories: Lincoln wheat cents (1909–1958), Mercury dimes (1916–1945), Morgan dollars (1878–1921), Buffalo nickels (1913–1938), and modern Proof sets (1960–present). Each test coin has a known strike type — Proof, SMS, Specimen, or business strike — and we've documented the key diagnostic features (reverse die characteristics, frosting patterns, edge treatment) that a quality database should surface or support searching by. We spend 60 to 90 hours per app over 6 to 8 weeks, using each database on both desktop and mobile, testing offline functionality, and checking how the database updates and adds new varieties. We re-test quarterly and after each major app update.
We evaluate five core criteria: strike-type classification depth (can you search by strike type, or does the app lump all versions together?); offline functionality (does the database work without WiFi, or is it cloud-only?); variety granularity (how many die varieties per date are actually documented?); search usability (can you filter by date, mint, and strike type simultaneously?); and update frequency (how often does the database add new discoveries or correct old data?).
Our Standards
We believe a coin database app that treats every strike type the same is not worth your time or money. Strike type is not an afterthought — it's the foundation of accurate grading, value estimation, and collecting strategy. A Proof Morgan dollar and a business-strike Morgan dollar graded the same (MS-65) can differ by $500 or more. If your database doesn't let you search, filter, or drill into strike classification, you're guessing. We score apps on whether they document strike types distinctly; whether the strike data is searchable (not just visible in an image caption); whether they acknowledge the limits of their own data (e.g., 'this variety is known to exist but we lack reference images'); and whether the database was built by people who understand that Proof sets, SMS issues, and business strikes are three separate things. Secondary to this, we also reward apps that function fully offline, because a collector shouldn't need WiFi just to look up a coin reference.
Disclosure
We do not accept paid placement, sponsorship, or app-developer fees — our reviews are funded by readers only; we do not test or recommend databases that treat strike-type information as secondary or optional, because a database without strike-type clarity is a marketing tool, not a reference; we do not claim expertise in world coins, ancient coins, or specialized errors beyond what our test set covers, and we acknowledge that some collectors need reference books and expert forums more than any app can provide.
Contact
If you're a database developer who wants your app tested, or a collector who'd like to suggest coins or strike types for us to prioritize in the next round of testing, use the contact form on the site. We review all requests and typically respond within two weeks.