Comparison

Rock ID vs Geomaster

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

Head to head
About

Rock ID

Instantly identify rocks, minerals, and gems by snapping a photo. Explore detailed profiles, manage your personal collections, and keep a log of all your discoveries. Become a geology expert with this comprehensive guide.

Highlights
  • Instant AI-powered stone identification
  • Vast catalog of rock profiles
  • Personal rock and mineral collections
  • Detailed history of identifications
  • Learn rock composition and origin
  • Distinguish real gems from fakes
Read full description

If you’re looking for an app to help you identify rocks and track your mineral collection, you’ve struck gold! Rock ID is an ultimate package of features that lets you manage your assortment of rocks and pick up some essential geology facts along the way. 1. Identify any unknown stones and minerals instantly! Having a hard time trying to identify the weird rock you’ve come across? Unsure if you’re about to purchase a genuine obsidian stone or a worthless imitation? Let Rock ID solve the mystery for you! Just snap a picture of any stone or mineral, and the app’s rock identifier will effortlessly recognize it. Rock ID can even distinguish a real diamond from a fake one. 2. Learn more about various types of rocks! Eager to get to know your rocks in a more effective way? Rock ID can help you with that! Each mineral, gem, rock, and stone in the app’s vast catalog has a descriptive profile. There, you can learn the composition of different rocks, their origin, and if they’re considered valuable. You can also discover if they have any historical or modern use and enjoy a list of intriguing facts about them. 3. Build and manage your rock collections! Want to keep track of your extensive rock collection in one place? Rock ID is the solution you’re looking for! You can easily arrange your collections of rocks, minerals, gems, and crystals and access each of them instantly, view essential information, or shuffle your collections however you desire! 4. Keep track of all your discoveries! Unsure if you’ve already seen that mineral? Rock ID will remember each identified rock for you! The app keeps a lengthy log of all snaps you take, making it virtually impossible to lose any valuable discovery. 5. Why choose Rock ID? • Instant rock identifier powered by AI • Vast catalog of rock profiles • Personal collections of rocks and minerals • Detailed history of all identifications With Rock ID, you’ll become a geology expert in no time! Let the app become your trusty source of mineral knowledge and leave the days of struggling with rock identification behind. Subscribe to Rock ID Premium to get unlimited access to all the app’s features: • Subscriptions are billed weekly, monthly, or annually at the rate depending on the subscription plan. • Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. All personal data is protected in accordance with the Terms of Use and Privacy Policy: http://aiby.mobi/rockid_ios/terms/ http://aiby.mobi/rockid_ios/privacy/ For any questions or inquiries, please use our customer support form at http://aiby.mobi/rockid_ios/support/

About

Geomaster

This app serves as a comprehensive field and study companion for geology enthusiasts, students, and professionals. It offers integrated geological tools for measurement, reference, and identification, supporting both academic exploration and real-world fieldwork.

Highlights
  • Strike and Dip Compass
  • Trend and Plunge Compass
  • Geological Time Scale
  • Geological Dictionary
  • Rock Identification Trees
  • Mineral Classification
Features
Read full description

GeoMaster GeoMaster is a comprehensive field and study companion for geologists, earth science students, and enthusiasts. Designed to support both fieldwork and academic exploration, GeoMaster integrates powerful geological tools and reference resources into a single, user-friendly platform. Core Features: Strike and Dip Compass – Accurately measure the orientation of geological structures. Trend and Plunge Compass – Precisely assess the directional geometry of features. Navigation Compass – Maintain orientation during field mapping and traverses. Geological Time Scale – Access a structured timeline of Earth’s history. Geological Time Details – Examine detailed information on individual time periods. Quick-Access Widgets – View geological time and dictionary entries directly from your home screen. Geological Dictionary – Reference essential terminology with concise, searchable definitions. Favorites System – Mark and revisit frequently used terms and entries. Rock Section – Browse descriptions, key properties, and identification guides. Identification Trees – Use step-by-step decision trees to assist in rock recognition. Classification Diagrams – Visual tools for accurately classifying rock types. Mineral Section – Explore minerals with detailed property data, groupings, and classification schemes. Why GeoMaster? Integrated Geological Toolkit – Combines measurement, reference, and identification in one app. Field-Ready Design – Optimized for clarity, speed, and usability in real-world conditions. Structured Learning Support – Ideal for both academic study and field applications. Ongoing Enhancements – Regular updates with expanded content and new features. Download GeoMaster today and equip yourself with a reliable, professional-grade geology toolkit—ready for the field, the lab, or the classroom.

Screenshots

Rock ID4 screens
Geomaster4 screens

Verdict

The call

The clearest difference is review sentiment: Geomaster at 100% against Rock ID's 37%. Geomaster also leads on rating (5.0 vs 4.4) and in-app purchases (none vs 17). Rock ID's advantage is ratings volume (3.1K vs 4) and update cadence (monthly vs every 3 months). On price, ads, device support and iOS requirement 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. Rock ID sells 13 in-app purchases, starting at $4.99 per 7 days. Geomaster asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Geomaster holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Rock ID has 3.1K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 37% of Rock ID's written reviews are positive against 100% of Geomaster's.

UpkeepUpdate frequency

Rock ID ships an update monthly, Geomaster every 3 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
Rock ID versus Geomaster: the parameters behind the verdict, then further details
ParameterRock IDGeomaster
PriceFreeFree
Rating4.4 (3.1K ratings)5.0 (4 ratings) — better
Positive reviews37.3% of reviews100.0% of reviews — better
Number of ratings3.1K — better4
Update frequencyMonthly — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhoneiPhone, iPad — better
Requires iOS16.0 — better17.6
Further details — not scored
Size48 MB11 MB
Age rating4+4+
DeveloperAIBYJacques Brayel Tchouanmoe

Customer experience

Rock ID

All ratings3,067 ratings
Positive83.6%
Neutral5.1%
Negative11.3%
Written reviews177 reviews
Positive37.3%
Neutral4.5%
Negative58.2%

Geomaster

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Rock ID

Reported bugs

3 issues
  • Incorrect identification of common stones
  • Failure to recognize obvious stone types
  • Inability to scan certain stones

Requested features

4 requests
  • More detailed stone information
  • Improved identification accuracy
  • Ability to manually correct misidentifications
  • Option to disable paywall for limited use

Geomaster

Not enough reviews yet to summarise bugs or requests.

In-app purchases

13 purchases

Rock ID

Subscriptions13
  • Rock ID PRO3 Days trial$4.997 Days
  • Rock ID PRO$4.997 Days
  • Weekly access (3 days trial)3 Days trial2 variants$5.997 Days
Show 10 more
  • Weekly access2 variants$5.997 Days
  • Weekly access (3 days trial)3 Days trial$6.997 Days
  • Weekly access$6.997 Days
  • Rock ID PRO$6.997 Days
  • Rock ID PRO3 Days trial$6.997 Days
  • Yearly premium subscription$19.991 Year
  • Yearly access (3 days trial)3 Days trial$19.991 Year
  • Yearly premium subscription$29.991 Year
  • Rock ID PRO2 variants$29.991 Year
  • Yearly premium subscription2 variants$39.991 Year
None

Geomaster

No in-app purchases

Questions

Is Rock ID free?
Rock ID is free to download, with in-app purchases available.
Is Geomaster free?
Geomaster is free to download, with no in-app purchases.
Which has better reviews, Rock ID or Geomaster?
Geomaster is rated higher. Rock ID averages 4.4 out of 5 from 3.1K ratings, while Geomaster averages 5.0 from 4 ratings.
Do Rock ID or Geomaster have ads?
Neither Rock ID nor Geomaster shows ads.
Which is updated more often, Rock ID or Geomaster?
Rock ID ships an update monthly, and Geomaster every 3 months. Most recently, Rock ID was updated on October 27, 2026 and Geomaster on October 24, 2026.

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