Comparison

Gem Identifier & Rock ID vs Basic Math Cards & Questions

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

Head to head
About

Gem Identifier & Rock ID

Identify rocks, gems, and crystals instantly by taking a photo. Access a comprehensive database with detailed information and authenticate precious stones. Includes a built-in metal detector for further analysis.

Highlights
  • Instant stone identification via photo
  • Comprehensive stone database
  • Gem authentication tool
  • Built-in metal detector
  • AI recognition technology
Features
Read full description

Gem Identifier - Discover the Hidden World of Stones Unlock the mysteries of every rock, gem, and crystal you encounter with our powerful identification app. Whether you're a geology enthusiast, collector, or simply curious about the stones around you, this app transforms your phone into a professional geological tool. Instant Stone Identification - Simply take a photo and get accurate identification results in seconds. Our advanced AI recognition technology helps you identify rocks, gems, crystals, and stones with remarkable precision. Comprehensive Stone Database - Access detailed information about thousands of stones including their formation, properties, historical significance, and metaphysical meanings. Learn fascinating facts that bring each specimen to life. Gem Authentication Tool - Verify the authenticity of your precious stones and gems. Our specialized feature helps you distinguish between natural stones and synthetic alternatives, giving you confidence in your collection. Built-in Metal Detector - Discover the magnetic properties of your stones using your device's magnetometer. This unique feature adds another layer of analysis to help you understand your specimens better. Perfect for rock hounds, jewelry enthusiasts, students, and anyone passionate about the natural world. Start your geological adventure today and become an expert stone identifier. Every stone has a story waiting to be discovered. Download now and transform the way you explore the fascinating world of minerals and gems. Terms of Use: https://innotent.io/rock-identifier-terms-of-use/ Privacy Policy: https://innotent.io/rock-identifier-privacy-policy/

About

Basic Math Cards & Questions

This app offers quick math quizzes to boost mental agility and focus. It features timed challenges, customizable operations, and progress tracking for learners of all ages. Improve your speed and memory with daily brain training exercises.

Highlights
  • Daily brain training
  • Timed challenges
  • Customizable math operations
  • Multiple difficulty levels
  • Progress tracking
  • Game-like interface
Features
Read full description

Math Problems – Train Your Brain in Minutes a Day Boost your mental agility, speed, and focus with Mental Problems, the fun, game-like brain trainer for learners of all ages. Solve challenging problems, track your progress, and sharpen your mind—anytime, anywhere. Why Math Problems? Quick Practice: Endless problems for daily brain training. Timed Challenges: Test your speed with 60-second or 30-seconds sprints. Customizable Focus: Practice addition, subtraction, multiplication, division, or a mix. Multiple Difficulty Levels: From very easy to hard—grow at your own pace. Track Your Progress: Scoreboards and best records to measure improvement. How it Works: Choose your game mode and difficulty. Select the math operations you want to focus on. Solve problems as fast as you can! Compete against your best score and improve every day. Perfect for students, professionals, and anyone who wants to keep their brain sharp. Just a few minutes a day can help you think faster, remember more, and have fun while doing it! As a premium member of app, you enjoy unlimited access to all features! By subscribing you get unlimited access to all the app’s functionality for the whole duration of your subscription period. Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period. You can manage your subscription and turn off the auto-renewal anytime through your Account Settings. Privacy Policy: https://mobile-apps.dev/mental-math-privacy-policy/ Terms of Use: https://mobile-apps.dev/mental-math-terms-of-use/

Screenshots

Gem Identifier & Rock ID4 screens
Basic Math Cards & Questions4 screens

Verdict

The call

The clearest difference is update cadence: Basic Math Cards & Questions at weekly against Gem Identifier & Rock ID's monthly. On price, rating, ratings volume and ads 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 Identifier & Rock ID sells 5 in-app purchases, starting at $6.99 per 7 days and Basic Math Cards & Questions sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.4 for Gem Identifier & Rock ID against 4.5 for Basic Math Cards & Questions. Both are backed by a comparable volume of ratings — 21 and 23 respectively.

UpkeepUpdate frequency

Gem Identifier & Rock ID ships an update monthly, Basic Math Cards & Questions weekly. The most recent releases landed on September 18, 2026 and September 15, 2026 respectively.

Scorecard1 real difference · 9 level
Gem Identifier & Rock ID versus Basic Math Cards & Questions: the parameters behind the verdict, then further details
ParameterGem Identifier & Rock IDBasic Math Cards & Questions
PriceFreeFree
Rating4.4 (21 ratings)4.5 (23 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings2123 — better
Update frequencyMonthlyWeekly — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone
Requires iOS16.0 — better16.6
Further details — not scored
Size36 MB31 MB
Age rating4+4+
DeveloperInnotent LTDViacheslav Khakhulin

Customer experience

Gem Identifier & Rock ID

All ratings21 ratings
Positive85.7%
Neutral0.0%
Negative14.3%

Basic Math Cards & Questions

All ratings23 ratings
Positive87.0%
Neutral0.0%
Negative13.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

5 purchases

Gem Identifier & Rock ID

Subscriptions4
  • Weekly$6.997 Days
  • Yearly$19.991 Year
  • Yearly, 3 Days Free Trial3 Days trial$29.991 Year
Show 1 more
  • Yearly$29.991 Year
One-time1
  • Lifetime$14.99
3 purchases

Basic Math Cards & Questions

Subscriptions2
  • Monthly Pro$2.991 Month
  • Yearly Pro3 Days trial$11.991 Year
One-time1
  • Lifetime Pro$17.99

Questions

Is Gem Identifier & Rock ID free?
Gem Identifier & Rock ID is free to download, with in-app purchases available.
Is Basic Math Cards & Questions free?
Basic Math Cards & Questions is free to download, with in-app purchases available.
Which has better reviews, Gem Identifier & Rock ID or Basic Math Cards & Questions?
Basic Math Cards & Questions is rated higher. Gem Identifier & Rock ID averages 4.4 out of 5 from 21 ratings, while Basic Math Cards & Questions averages 4.5 from 23 ratings.
Do Gem Identifier & Rock ID or Basic Math Cards & Questions have ads?
Both Gem Identifier & Rock ID and Basic Math Cards & Questions show ads.
Which is updated more often, Gem Identifier & Rock ID or Basic Math Cards & Questions?
Gem Identifier & Rock ID ships an update monthly, and Basic Math Cards & Questions weekly. Most recently, Gem Identifier & Rock ID was updated on September 18, 2026 and Basic Math Cards & Questions on September 15, 2026.

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