Forty rankings across four storefronts, picked on proximity of positioning. Most of these apps do the same thing: point the camera at an object, get a number, close the app. A few are price references with a decade of data behind them. Not one is a place where you keep what you own. That gap is the whole strategy — and the thing most likely to be thrown away by accident.

The four markets are not one fight, and reading them as one is the most expensive mistake available here. France and Germany are open fields. The UK is contested. The US is locked. One publisher leads all four.

Caveat carried over from the source research: this segment is flooded with 2026 apps built on the same template, most with 0–10 ratings. Ranks 2–6 reflect positioning overlap, not measurable market share. Only AntiqSnap, PriceCharting and Discogs have verifiable traction.

Sorting the field by the job it's hired for, rather than by the feature it screenshots, splits it cleanly. Only one of these three is CLCTN's actual market, and it's the emptiest.

Ranking is proximity of positioning, not size. The threat column is the one that matters: it says what each app could take from you, which for most of them is nothing. Read this table as the soft market.

Add one name the panels use as their reference rather than a ranked entry: Retro Cash (6760224928) — scan, identification, market estimate and collection management, in French, at 4.5★ over 138 ratings. It is the only app on any of these four lists that ships your exact promise in your own market, and its 0 ratings on DE, GB and US are a useful measure of how little traction travels.

Same method, US storefront. Only one app appears in both top tens — AntiqSnap. Everything else changes: six frontal competitors clear 6,000 ratings, three of your core verticals are held by incumbents at 25,000–67,000, and the clones are well made and well rated. Read this table as the hard market.

Largely the same cast of apps, in wildly different sizes. Germany is the softest of the four — no frontal rival clears 400 ratings. The UK has a leader, a well-rated pack, and a competitor that isn't an app at all.

One store page and one keyword strategy cannot serve all four. This is the sequencing decision, and the numbers make it for you.

Scored against the three apps that actually have users, using their US numbers — the hardest of the four markets. A page that only lists your advantages is a page nobody can act on.

The five meters in the revenue model never touch a transaction — that's why none of the forty apps above competes with them. A take-rate on sales is a different business with a different competitive set, and the apps that beat you there aren't on any of these four tables. Worth reading before it gets built, not after.

Commercial terms for the marketplaces named above change often and vary by category and country — confirm current rates before any of this reaches the business plan.

Each one turns a weakness above into a position none of the forty apps can copy without becoming a different app.

Source panels: FR, DE, GB and US storefronts, N=10 each, selected on competitive proximity and tie-broken on visibility within the storefront, IDs verified via iTunes Lookup. Ratings as of August 2026. AntiqSnap (6752929120) is the only app ranked in all four; Discogs and PriceCharting appear in all four but as partial overlaps.