Comparison

Hoover Decoder vs Gem Heaven

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Hoover Decoder

Read full description

Hoover Decoder Configuration Software. A valid Flowguard Account is necessary to configure the Hoover Decoders.

About

Gem Heaven

Instantly identify rocks, minerals, and gemstones with AI-powered analysis. Get scientific breakdowns, market valuations, and build a personal collection portfolio. Connect with specialists and trade securely on the integrated marketplace.

Highlights
  • AI-powered stone identification
  • Market valuation estimates
  • Personal collection portfolio
  • Gemology specialist chat
  • Secure marketplace for trading
  • Multi-currency support
Features
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You pick up a stone. You wonder what it is, what it's worth, and whether it's real. Gem Heaven answers all three — instantly. Point your camera at any rock, mineral, or gemstone and get a full scientific breakdown in seconds, powered by AI trained on thousands of specimens. What you can do * Identify any stone — point your camera and get name, hardness, luster, chemical formula, and an authenticity assessment * Get a market valuation — refine by size, weight, and condition for an AI-powered value estimate * Build your Portfolio — save every scan to your personal portfolio and track your total collection value over time * Chat with a gemology specialist — ask about treatments, certifications, and care; the AI recommends regional labs (GIA, SSEF, GIT, and more) when you need a certified opinion * Buy and sell on the marketplace — list stones at a fixed price or run an auction; payments are held in Stripe escrow until the buyer confirms receipt. Gem Rock Auction. * Shop in your currency — prices display in 160+ currencies automatically based on your location *Message sellers directly — built-in chat on every listing, no need to leave the app Who it's for Gem Heaven is built for everyone on the spectrum from curious beginner to serious collector. If you've ever picked up a pretty rock on a hike, inherited a jewellery box you can't identify, or spent weekends at a gem show looking for rough stones to cut — this app was made for you. Hobbyists use it to learn. Dealers use it to list and sell. Lapidaries use it to source. The Marketplace Every listing on Gem Heaven is backed by Stripe escrow — your payment is held securely until you receive your stone and confirm. Sellers receive 88% of every sale. Listings support fixed price or auction format, with in-app messaging so buyers and sellers can discuss details before any money moves. Prices display in the buyer's local currency with live exchange rates, so there's no confusion across borders. How it works Point — open the camera, hold it over your stone, tap Identify Learn — view the full breakdown: name, properties, authenticity, estimated value Act — save it to your collection, list it for sale, or ask the AI specialist a follow-up question Subscriptions & Credits: Gem Heaven uses a credit system called Gems. New users receive 6 Gems on sign-up at no charge. Credit costs per action: Identify (3 Gems), Valuation (2 Gems), Chat (1 Gem), Create listing (5 Gems). Credits can be purchased as one-time packs: Starter: 10 Gems Subscriptions: Weekly,Monthly and Yearly Payment is charged to your Apple ID account at confirmation of purchase. Download and start identifying Gem Heaven is free to download. Create an account, claim your 6 starter Gems, and point your camera at the nearest stone. Privacy Policy: https://gemheaven.codematics.co/privacy Terms of Use: https://gemheaven.codematics.co/terms

Screenshots

Hoover Decoder3 screens
Gem Heaven4 screens

Verdict

The call

The clearest difference is in-app purchases: Hoover Decoder at none against Gem Heaven's 6. Hoover Decoder also leads on ads (none vs shown) and iOS requirement (13.0 vs 15). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Gem Heaven sells 6 in-app purchases, starting at $4.99 per 7 days. Hoover Decoder asks for nothing beyond the download.

Scorecard3 real differences · 7 level
Hoover Decoder versus Gem Heaven: the parameters behind the verdict, then further details
ParameterHoover DecoderGem Heaven
PriceFreeFree
Rating—5.0 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—4 — better
Update frequency—Weekly
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15
Further details — not scored
Size2 MB78 MB
Age rating4+4+
DeveloperHoover Pumping Systems CorporationCodematics Services

In-app purchases

None

Hoover Decoder

No in-app purchases

6 purchases

Gem Heaven

Subscriptions3
  • Weekly$4.997 Days
  • Monthly Subscription$14.991 Month
  • Yearly$49.991 Year
One-time3
  • Starter Pack$0.99
  • Explorer Pack$2.99
  • Collector Pack$9.99

Questions

Is Hoover Decoder free?
Hoover Decoder is free to download, with no in-app purchases.
Is Gem Heaven free?
Gem Heaven is free to download, with in-app purchases available.
Do Hoover Decoder or Gem Heaven have ads?
Gem Heaven shows ads; Hoover Decoder does not.

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