Comparison

HTMLViewer Pro+ vs Rock Crystal Gem Identifier

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

Head to head
About

HTMLViewer Pro+

Features
Read full description

Offline HTML viewer and source-code reader with syntax highlighting. Open, inspect and edit any .html file on iPhone – even without an internet connection. KEY FEATURES - Instant import from Files, URL or manual input - 100% WebKit rendering (CSS3, ES6, SVG, Canvas) - Source view with coloured HTML, CSS and JS - Dark Mode for comfortable late-night reading - Smart file manager: folders, favourites, fast search - Privacy first: no ads, no analytics, all on-device USE CASES • Developers reviewing prototypes • Students learning web basics • Testers checking responsive layouts offline • Writers drafting blog posts in raw HTML • Anyone opening .html email attachments ROADMAP Upcoming 1.1 will add split-view preview, auto-refresh and local web-server mode.

About

Rock Crystal Gem Identifier

Instantly identify rocks, crystals, and gemstones using AI. Snap a photo to get details on name, properties, and estimated value. Chat with an AI geologist for insights on origins and care, with all data saved privately on your device.

Highlights
  • AI Rock & Crystal Identification
  • Properties & Formation Details
  • Estimated Value with Reasoning
  • AI Geologist Chat
  • Private On-Device History
  • Simple and Fast Interface
Features
Read full description

Instantly identify any rock, crystal, gemstone, or mineral with the power of AI. Snap a photo and get a detailed breakdown in seconds — name, type, properties, estimated value and more — all saved privately on your device. WHAT YOU GET • AI Rock & Crystal Identification: point your camera at any stone, crystal, gem, geode or mineral and get instant results. • Properties & Formation: learn the type, physical properties, how it formed, and where it is found. • Estimated Value: see a price range plus the reasoning behind it — rarity, quality, size and clarity. • Ask an AI Geologist: chat about your stone's origins, meaning, authenticity, and how to care for it. • Private History: every scan and conversation is stored securely on your device to browse and compare anytime. • Beautiful & Simple: clean design, fast answers, and elegantly organized results. Whether you are a rockhound building a collection, a crystal lover exploring healing stones, or simply curious what you found, this app is your personal AI geologist — ready anytime, anywhere. For the subscription option, subscriptions renew within 24 hours of the subscription period ending, and a subscription purchase will be charged through your iTunes account. Manage at any time using Account Settings in iTunes. Terms of Use can be found at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

HTMLViewer Pro+4 screens
Rock Crystal Gem Identifier4 screens

Verdict

The call

The clearest difference is price: Rock Crystal Gem Identifier at Free against HTMLViewer Pro+'s $2.99. HTMLViewer Pro+'s advantage is in-app purchases (none vs 2) and iOS requirement (16.6 vs 26.0). On ads 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

Rock Crystal Gem Identifier is free to download; HTMLViewer Pro+ costs $2.99 up front. Rock Crystal Gem Identifier sells 2 in-app purchases, starting at $2.99 per 7 days. HTMLViewer Pro+ asks for nothing beyond the download.

Scorecard3 real differences · 6 level
HTMLViewer Pro+ versus Rock Crystal Gem Identifier: the parameters behind the verdict, then further details
ParameterHTMLViewer Pro+Rock Crystal Gem Identifier
Price$2.99Free — better
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequency—Every 7 months
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhoneiPhone
Requires iOS16.6 — better26.0
Further details — not scored
Size3 MB26 MB
Age rating4+4+
Developer倩 罗Streamlined Studios

In-app purchases

None

HTMLViewer Pro+

No in-app purchases

2 purchases

Rock Crystal Gem Identifier

Subscriptions2
  • Premium Weekly3 Days trial$2.997 Days
  • Premium Yearly$29.991 Year

Questions

Is HTMLViewer Pro+ free?
HTMLViewer Pro+ costs $2.99, with no in-app purchases.
Is Rock Crystal Gem Identifier free?
Rock Crystal Gem Identifier is free to download, with in-app purchases available.
Do HTMLViewer Pro+ or Rock Crystal Gem Identifier have ads?
Neither HTMLViewer Pro+ nor Rock Crystal Gem Identifier shows ads.

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