Math Interactive vs Arbitrary Triangle PRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Math Interactive
Enhance your mathematical understanding with a comprehensive reference covering 23 subjects, over 200 articles, and interactive illustrations. Explore detailed explanations, solved problems, and proofs to master concepts from algebra to calculus. Access all content and features with a premium upgrade.
- 23 math subjects covered
- Over 200 articles with detailed descriptions
- Solved solutions and thorough proofs
- Interactive illustrations for better understanding
- Quick search for articles and formulas
- Recents category to pick up where you left off
- Share articles via social media and messaging
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Improve your math skills and get a deeper understanding of mathematical concepts, definitions, formulas and proofs. With 23 subjects containing more than 200 articles with detailed descriptions, solved solutions and thorough proofs, this app is perfect for every high school student or any person eager to learn mathematics. Improve your intuition by exploring the interactive illustrations and learn how to solve both simple and difficult math problems through elegant solutions. Buy Premium to access all content and features. • Quickly search for the article or formula you need. • Use the links to read more on a subject. • Improve your understanding with interactive illustrations. • Pick up where you left off with the "Recents"-category. • Share an article via mail, iMessage, Facebook etc. • Jump to any section through the bottom navigation. • Enjoy the graceful and user-friendly design. The app covers the following 23 subjects: • Coordinate System • Differential Calculus • Differential Equations • Exponential Functions • Functions • Geometry • Geometry Terms • Hypothesis Testing • Integral Calculus • Linear Functions • Numbers and Algebra • Percentages • Power Functions • Probability • Quadratic Equation • Quadratic Polynomial • Regression and Growth • Solid Geometry • Statistics • The Straight Line • Trigonometry • Vectors in 2D • Vectors in 3D Space
Arbitrary Triangle PRO
This app calculates all unknown quantities of an arbitrary triangle. It displays the formulas used and provides step-by-step solutions, supporting decimals and fractions. Calculations are saved in history and can be shared.
- Calculates all triangle quantities
- Displays formulas used
- Step-by-step solutions
- Supports decimals and fractions
- Calculation history
- Shareable solutions
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The best app to calculate all quantities of an arbitrary triangle. You must enter some quantities like two angles and one length. The algorithm searches the formulas of the missing quantities, shows them and calculates the results. The length of the decimal place can be changed. The algorithm shows when rounding or wrong values lead to an opposition. Decimals and fractions are supported. The solution is shown step by step. All calculations are stored in the history. The final solution can be shared. [ Contents ] - all important quantities for the arbitrary triangle - formulas for all important quantities of an arbitrary triangle - infographic to illustrate the topic - search bar to find the desired quantity - history function to save the input - detailed solution - positive numbers, decimals and fractions are supported - no ads! [ Usage ] - there are fields for entering values using a special keyboard - press the check mark button at the bottom right to start the calculation - if values are missing, all fields will be marked orange - if the values are wrong (e.g. negative lengths), the affected field will be highlighted red - if a value is no number, it is highlighted in red - the entries in the history can be deleted or sorted - if you select an entry in the history, it will be automatically loaded for the calculation - the whole history can be deleted by pressing a button - solutions can be shared [ Math conditions ] - each value must be greater than zero - each angle must be less than 180° - the sum of two sides must always be greater than the length of the third side
Screenshots
Verdict
The clearest difference is price: Math Interactive at Free against Arbitrary Triangle PRO's $2.99. Math Interactive also leads on ratings volume (726 vs 1) and iOS requirement (13.0 vs 15.0). Arbitrary Triangle PRO's advantage is in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 13 months). On ads 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
Math Interactive is free to download; Arbitrary Triangle PRO costs $2.99 up front. Math Interactive sells 1 one-off in-app purchase. Arbitrary Triangle PRO asks for nothing beyond the download.
Arbitrary Triangle PRO holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Math Interactive has 726 ratings behind it against 1, so its average is the more settled of the two.
Math Interactive ships an update every 13 months, Arbitrary Triangle PRO every 3 weeks. The most recent releases landed on September 21, 2026 and September 17, 2026 respectively.
| Parameter | Math Interactive | Arbitrary Triangle PRO |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 4.6 (726 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 58.3% of reviews | — |
| Number of ratings | 726 — better | 1 |
| Update frequency | Every 13 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 46 MB | 182 MB |
| Age rating | 4+ | 4+ |
| Developer | Rune Johannes Overgaard Hoejlund | Glindemann, Sennoun, Langer GbR |
Customer experience
Math Interactive
Arbitrary Triangle PRO
Bugs and requests
Math Interactive
Reported bugs
2 issues- Incorrect formulas and calculations
- Compatibility issues with newer iOS versions
Requested features
4 requests- Add more advanced math topics like calculus, matrices, etc.
- Include step-by-step solutions and more interactive elements
- Improve organization and flow of content
- Provide more real-world examples and applications
Arbitrary Triangle PRO
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Math Interactive
- Premium$2.99
Arbitrary Triangle PRO
No in-app purchases
Questions
Is Math Interactive free?
Is Arbitrary Triangle PRO free?
Which has better reviews, Math Interactive or Arbitrary Triangle PRO?
Do Math Interactive or Arbitrary Triangle PRO have ads?
Which is updated more often, Math Interactive or Arbitrary Triangle PRO?
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