VaultCheck – Game Duplicate & Sub Checker icon

VaultCheck – Game Duplicate & Sub Checker

by Vault Check LLC · vaultcheck.io · Shopping
Manifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

See if you already own a game, or it’s on your Game Pass or PS Plus, before you buy. Steam, PlayStation, Xbox, Nintendo & Epic.

Users
13
+3 in 30 days
Rating
4.2 / 5
unchanged in 30 days
Ratings
4
0 in 30 days
Store rank
#173K
#144K among extensions
Version
1.0.6
updated 1 Aug 2026

Users

monthly, 4 months
0613Jun 2026Sep 2026Oct 2026
Latest, 15 Oct 2026: 13 usersMove the mouse over the chart for any month

Ratings count

monthly, 4 months
024Jun 2026Sep 2026Oct 2026
Latest, 15 Oct 2026: 4 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About VaultCheck – Game Duplicate & Sub Checker

Play what you paid for. Three questions VaultCheck answers before you spend money on a game: 1. Do I already own this — on any platform? 2. Is it included with a subscription I already pay for? 3. Is it cheaper somewhere else right now? VaultCheck is the only extension that checks your PlayStation, Xbox and Nintendo libraries — not just Steam. Connect once, then shop normally. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT YOU SEE ON A STORE PAGE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ A small card appears with only what's relevant: "You already own this title on PlayStation." Cross-platform duplicate warning, plus a last-chance alert at checkout. "Included with Game Pass — play it at no extra cost." Catches games already free with a subscription you pay for. One catch can save you $70. "This one asks for ~25 hrs of your time (~62 hrs to 100% it)." Completion times from IGDB, so you see the time cost as well as the price. "Buying it grows your backlog to ~1,240 hrs." The honest number. Nobody else shows you this. "Cheaper elsewhere: $14.99 at Fanatical." Live price comparison across stores. Dismiss any warning permanently, for any game, as many times as you like. That's free and always will be. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ FREE — EVERY PLATFORM, NO CREDIT CARD ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ - All five platforms — Steam, PlayStation, Xbox, Nintendo, Epic - Duplicate warnings across every library - Subscription checks — Game Pass and PlayStation Plus Extra - Cheaper-elsewhere price check - Checkout warning screen - Completion times and backlog hours - Unlimited dismissals Premium ($1.99/month) adds a backlog analytics dashboard, subscription value breakdown, and a savings tracker. Everything that stops you overspending is free. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHERE IT WORKS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Steam · Epic Games Store · GOG · Humble Bundle · Fanatical · Green Man Gaming · PlayStation Store · Xbox / Microsoft Store · Nintendo eShop · and more added regularly. Cross-platform matching means owning God of War on PS5 warns you on the PC listing too — the check no Steam-only extension can do. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ TRY IT WITHOUT INSTALLING ANYTHING ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Run The Backlog Reckoning at vaultcheck.io/backlog — paste a Steam ID and get your unplayed count, the hours and dollars sitting in it, and a backlog grade from S to F. 60 seconds, no signup, no install. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ PRIVACY ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ - No passwords, ever. Steam uses its official sign-in — your password goes to Steam, never to us. Consoles are read from your own library page while you're already signed in. - What we store: the games you own, which platforms they're on, and which subscriptions you've told us you pay for. Nothing else — no browsing history, no keystrokes, nothing from unsupported sites. - On a store page, the extension reads that game's title and checks it against your library. It does nothing on other sites. - Price comparisons are looked up through CheapShark, which receives the game title only — never anything about you or your account. - Delete your account and your entire library at any time from your dashboard. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ GETTING STARTED ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1. Install VaultCheck 2. Connect Steam — about 30 seconds. Duplicate checks go live immediately. 3. Optional: add PlayStation, Xbox, Nintendo, Epic, and your subscriptions whenever you like. Each one closes another gap. 4. Shop anywhere. VaultCheck handles the rest. Questions, or a store you'd like supported? support@vaultcheck.io VaultCheck is an independent tool and is not affiliated with, endorsed by, or sponsored by Valve, Sony, Microsoft, Nintendo, or Epic Games. All trademarks belong to their respective owners.

Growth

WindowUsersChangeRatingsRating
7 days+1+8.3%00.00
30 days+3+30.0%00.00

Version history

6 versions recorded
1.0.61 Aug 2026
1.0.523 Jul 2026
1.0.414 Jul 2026
1.0.330 Jun 2026
1.0.220 Jun 2026
1.0.117 Jun 2026

Details

Category
Shopping
First seen
17 Jun 2026
Size
101 KB
Languages
en-US
Pricing
Free
Privacy policy
vaultcheck.io
Extension ID
oekpdiijkjckmmlkebmmajfkobecdjod

Permissions and risk

Elevated riskimpact 4, likelihood 2
Permissions
storageactiveTabscriptingwebNavigation
Site access
https://vaultcheck.io/*https://store.steampowered.com/*https://www.greenmangaming.com/*https://www.humblebundle.com/*https://www.gamestop.com/*https://www.gamestop.ca/*https://www.gamestop.ie/*https://www.gamestop.de/*https://www.gamestop.it/*https://www.gamestop.nl/*and 34 more

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