OPEAM vs Best Proportion Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OPEAM
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Best Proportion Calc
Easily solve proportion problems with a simple and intuitive interface. This app uses the cross product method for quick and accurate calculations across various fields like finance and science. It's available offline and free to use.
- Intuitive proportion calculation
- Cross product method for solving equations
- Versatile for finance, science, and more
- Offline functionality
- Free to use
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Dive into the world of math without the hassle with our super rule of three calculator! Whether you're an intrepid student, a numbers whiz, or just curious, our app is here to make proportion calculations as easy as child's play, thanks to the genius cross product method. Why our calculator is great: Intuitive Calculation: No more headaches! Enter your values, let our calculator do its magic, and voilà, your results are there! Product in Turbo Cross: Goodbye to headaches with complicated equations! Our app uses the cross product method to solve everything from simple equations to crazy puzzles. Versatile: Whether you need to solve problems related to finance, science, or other fields, our app offers exceptional versatility. Offline and Free as Air: Wherever you are, our app follows you. No need for Internet, no limits. Get ready to experience a mathematical adventure like never before. Download our rule of three calculator now and let the math magic happen!
Screenshots
Verdict
The clearest difference is ads: OPEAM at none against Best Proportion Calc's shown. OPEAM also leads on update cadence (every 4 weeks vs every 2 months) and iOS requirement (9.0 vs 14.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
OPEAM ships an update every 4 weeks, Best Proportion Calc every 2 months. The most recent releases landed on September 20, 2026 and September 13, 2026 respectively.
| Parameter | OPEAM | Best Proportion Calc |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 4 weeks — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 9.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 30 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | 广东中设智控科技股份有限公司 | Denis Belmont |
In-app purchases
OPEAM
No in-app purchases
Best Proportion Calc
No in-app purchases
Questions
Is OPEAM free?
Is Best Proportion Calc free?
Do OPEAM or Best Proportion Calc have ads?
Which is updated more often, OPEAM or Best Proportion Calc?
Other comparisons
