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.
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.
- Instant stone identification via photo
- Comprehensive stone database
- Gem authentication tool
- Built-in metal detector
- AI recognition technology
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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/
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.
- Daily brain training
- Timed challenges
- Customizable math operations
- Multiple difficulty levels
- Progress tracking
- Game-like interface
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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
Verdict
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
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.
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.
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.
| Parameter | Gem Identifier & Rock ID | Basic Math Cards & Questions |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (21 ratings) | 4.5 (23 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 21 | 23 — better |
| Update frequency | Monthly | Weekly — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 36 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Innotent LTD | Viacheslav Khakhulin |
Customer experience
Gem Identifier & Rock ID
Basic Math Cards & Questions
In-app purchases
Gem Identifier & Rock ID
- Weekly$6.997 Days
- Yearly$19.991 Year
- Yearly, 3 Days Free Trial3 Days trial$29.991 Year
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- Yearly$29.991 Year
- Lifetime$14.99
Basic Math Cards & Questions
- Monthly Pro$2.991 Month
- Yearly Pro3 Days trial$11.991 Year
- Lifetime Pro$17.99
Questions
Is Gem Identifier & Rock ID free?
Is Basic Math Cards & Questions free?
Which has better reviews, Gem Identifier & Rock ID or Basic Math Cards & Questions?
Do Gem Identifier & Rock ID or Basic Math Cards & Questions have ads?
Which is updated more often, Gem Identifier & Rock ID or Basic Math Cards & Questions?
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