Subtraction Math Trainer vs Greatest Common Divisor PRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Subtraction Math Trainer
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Subtraction Math Trainer is a math learning app designed to help you to practice subtraction. The built-in handwriting recognition allows you to draw answers directly on the screen. Comes with a number of simple mini-games to make learning more effective and less boring. You can practice the following math skills: Subtraction facts - numbers up to 10 Subtraction facts - numbers up to 18 Subtract a multiple of ten Relate addition and subtraction Subtraction facts - numbers up to 20 Subtract a one-digit number from a two-digit number Subtract two two-digit numbers Subtract multiples of 10 Subtract multiples of 100 Subtract multiples of 10 or 100 Balance subtraction equations Subtraction facts - numbers up to 100 Subtract two three-digit numbers Complete the subtraction sentence up to three digits Subtract numbers with four or five digits Balance subtraction equations up to three digits
Greatest Common Divisor PRO
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Finish your homework instantly. Prepare for exams without stress. Complete step-by-step solutions. Enter your numbers and calculate the greatest common divisor (GCD). HOW IT WORKS Enter your numbers into the appropriate fields and get started. You'll receive the solution instantly and can share it with friends or classmates. YOUR PERSONAL DATA We don't need it. Only anonymous data is collected, for example: - which features are used - how many solutions are generated This helps us improve the app. It is not possible to identify you from this data. EXTRAS - Prime factorization - Using divisors - Euclidean algorithm - Curated learning videos - Feedback for incorrect input - Manage your own solutions - App introduction CONTACT Questions and feedback are always welcome via Discord or directly in the app review.
Screenshots
Verdict
The clearest difference is update cadence: Greatest Common Divisor PRO at every 5 weeks against Subtraction Math Trainer's every 34 months. Greatest Common Divisor PRO also leads on price ($1.99 vs $2.99). Subtraction Math Trainer's advantage is iOS requirement (12.0 vs 15.0). On ads, in-app purchases 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
Subtraction Math Trainer costs $2.99 and Greatest Common Divisor PRO $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Subtraction Math Trainer ships an update every 34 months, Greatest Common Divisor PRO every 5 weeks. The most recent releases landed on October 5, 2026 and October 24, 2026 respectively.
| Parameter | Subtraction Math Trainer | Greatest Common Divisor PRO |
|---|---|---|
| Price | $2.99 | $1.99 — better |
| Update frequency | Every 34 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 18 MB | 179 MB |
| Age rating | 4+ | 4+ |
| Developer | Sergey Malugin | Glindemann, Sennoun, Langer GbR |
In-app purchases
Subtraction Math Trainer
No in-app purchases
Greatest Common Divisor PRO
No in-app purchases
Questions
Is Subtraction Math Trainer free?
Is Greatest Common Divisor PRO free?
Do Subtraction Math Trainer or Greatest Common Divisor PRO have ads?
Which is updated more often, Subtraction Math Trainer or Greatest Common Divisor PRO?
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