Comparison

Sample for Science vs Rock Stone Identifier

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

Head to head
About

Sample for Science

Features
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The application is open to the general public, anyone can use it. No account creation required. The user can enter the application by logging in with their Google account or AppleID. The application was designed to distribute and reuse scientific samples that would otherwise be discarded. There is no paid content in the app.

About

Rock Stone Identifier

Instantly identify rocks, minerals, and gemstones using AI. Explore detailed geological data, check authenticity, and discover market values. Ideal for collectors, students, and professionals.

Highlights
  • AI-powered rock and gemstone recognition
  • Instant identification of minerals and crystals
  • Detailed geological and gemstone encyclopedia
  • Authenticity and fake stone detection
  • Market value and origin insights
  • Collection cataloging and organization
  • Spiritual and healing properties information
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GemAI: Rock Identifier – AI Gemstone & Crystal Guide Discover, identify, and explore rocks, minerals, gemstones, and crystals instantly with GemAI, the AI-powered app for collectors, hobbyists, geology students, geologists, jewelers, and crystal enthusiasts in the U.S. Whether hiking, visiting quarries, exploring local geological sites, or managing your personal rock and crystal collection at home, GemAI offers fast, accurate AI recognition and a complete gemstone encyclopedia at your fingertips. Why GemAI Identifying rocks, minerals, and gems can be challenging without experience. GemAI combines AI-powered recognition with detailed geological and gemstone data. Instantly analyze physical and chemical properties, detect natural, synthetic, or fake stones, check authenticity, discover market values, origins, and even spiritual and healing properties. GemAI is perfect for collectors, students, professionals, and hobbyists who want accurate results quickly. Benefits Hobbyists & Collectors β€’ Identify rocks, crystals, and gemstones instantly without carrying heavy field guides β€’ Discover real market values for trading, selling, or investing β€’ Track, organize, and catalog your personal rock and crystal collection β€’ Explore trending, rare, and valuable stones popular in U.S. rock hounding communities Students & Learners β€’ Recognize minerals and gemstones in the field for geology, chemistry, or earth science studies β€’ Learn about physical properties, chemical composition, and origins β€’ Prepare for exams and projects with accurate, detailed rock and mineral data Geologists & Jewelers β€’ Verify gemstone authenticity quickly and accurately β€’ Access a reliable database of rare and valuable specimens β€’ Gain professional insights for consulting, appraisal, or trading β€’ Enhance jewelry and gemology services with precise identification and market information AI Accuracy & Fast Recognition GemAI’s AI analyzes shape, color, texture, and chemical composition to distinguish natural, synthetic, and fake stones. Investors, jewelers, and collectors can get instant gemstone valuations, rarity and origin insights, and authentication without lab testing. This combination of speed, accuracy, and convenience makes GemAI essential for anyone serious about rocks and gems. Rock Hounding & Crystal Collecting Trends Rock hounding and crystal collecting are growing hobbies in the U.S., especially among millennials and Gen Z. National and state parks, local quarries, and online communities attract thousands of collectors every year. GemAI supports this trend by helping users: β€’ Identify stones outdoors quickly and accurately β€’ Catalog and organize collections with detailed chemical, physical, and market data β€’ Explore crystal healing, energy balancing, meditation, and wellness trends β€’ Connect learning with practical collecting experiences Education & Spiritual Insights GemAI is more than an ID toolβ€”it’s an educational companion for students, hobbyists, and professionals: β€’ Access detailed mineral profiles with chemical formulas and physical properties β€’ Learn geological formations, origins, and historical significance Why GemAI Stands Out β€’ AI-Powered Recognition: Fast, accurate, reliable identification β€’ Comprehensive Database: Thousands of rocks, minerals, gemstones, and crystals β€’ Market Insights: Evaluate stones for trade, resale, or personal collections Download GemAI: Rock Identifier today to: β€’ Instantly identify rocks, gems, and crystals β€’ Explore physical, chemical, and spiritual properties β€’ Catalog and manage your personal collection β€’ Access expert insights, gemstone values, and rare specimens Free vs Premium β€’ Free: 1 analysis, limited price information β€’ Premium (Unlimited): β€’ Weekly: $6.99 β€’ Annual: $29.99 β€’ Lifetime: $39.99 (Prices vary by region. Subscriptions auto-renew; manage or cancel in iOS Settings.) Links β€’ Terms of Use: https://gemai.us/terms β€’ Privacy Policy: https://gemai.us/privacy

Screenshots

Sample for Science3 screens
Rock Stone Identifier4 screens

Verdict

The call

The clearest difference is in-app purchases: Sample for Science at none against Rock Stone Identifier's 3. Sample for Science also leads on iOS requirement (12.0 vs 15.0). Rock Stone Identifier's advantage is update cadence (weekly vs every 6 weeks). On price, ads and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Rock Stone Identifier sells 3 in-app purchases, starting at $6.99 per 7 days. Sample for Science asks for nothing beyond the download.

UpkeepUpdate frequency

Sample for Science ships an update every 6 weeks, Rock Stone Identifier weekly. The most recent releases landed on October 19, 2026 and October 20, 2026 respectively.

Scorecard3 real differences Β· 5 level
Sample for Science versus Rock Stone Identifier: the parameters behind the verdict, then further details
ParameterSample for ScienceRock Stone Identifier
PriceFreeFree
Positive reviewsβ€”100.0% of reviews
Update frequencyEvery 6 weeksWeekly β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
Monetizationβ€”Free with in-app purchases
DevicesiPhone, iPad, iPod β€” betteriPhone, iPod
Requires iOS12.0 β€” better15.0
Further details β€” not scored
Size58 MB69 MB
Age rating+44+
DeveloperUniversidade Federal Fluminense - UFFZytnec LLC

In-app purchases

None

Sample for Science

No in-app purchases

3 purchases

Rock Stone Identifier

Subscriptions2
  • Weekly Plan3 Days trial$6.997 Days
  • Yearly Plan3 Days trial$29.991 Year
One-time1
  • Lifetime Plan$39.99

Questions

Is Sample for Science free?
Sample for Science is free to download, with no in-app purchases.
Is Rock Stone Identifier free?
Rock Stone Identifier is free to download, with in-app purchases available.
Do Sample for Science or Rock Stone Identifier have ads?
Neither Sample for Science nor Rock Stone Identifier shows ads.
Which is updated more often, Sample for Science or Rock Stone Identifier?
Sample for Science ships an update every 6 weeks, and Rock Stone Identifier weekly. Most recently, Sample for Science was updated on October 19, 2026 and Rock Stone Identifier on October 20, 2026.

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