Comparison

Triangle Solver vs Tri

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

Head to head
About

Triangle Solver

This app provides step-by-step solutions for triangle calculations and angle conversions. It includes practice exercises, a trigonometry formula sheet, and an integrated math keyboard for easy input. Ideal for students and professionals needing to master triangle properties.

Highlights
  • Step-by-step triangle calculations
  • Angle conversion
  • Practice trigonometry exercises
  • Trigonometry formula sheet
  • Integrated math keyboard
Features
Read full description

Turn your device into the perfect study companion for geometry and trigonometry. "Triangle Solver" is the ultimate app that guides you through solving triangles, helping you understand the logic behind the numbers and always get the right results. Here's everything our app can do for you: ▶ STEP-BY-STEP SOLUTIONS Get the solution in an instant. But we don't stop at the final result: input any 3 values, and the app will completely solve any type of triangle, showing you all the logical steps in detail. Find key values like sides, angles (in DEG, GON, and RAD formats), area, and perimeter, all the way to advanced values like altitudes, inradius, and circumradius. It's the perfect tool to learn the correct method and get fully prepared for homework and exams. ▶ ANGLE CONVERSION The app includes a dedicated section for quick and accurate conversion of angle measurements. Easily switch between units: the system supports decimal degrees (DEG), gradians (GON), radians (RAD), and degrees, minutes, and seconds (DMS). ▶ INTEGRATED MATH KEYBOARD Use our dedicated interface, designed to be incredibly simple and intuitive. Smoothly and quickly type in your values, having only the keys you truly need right at your fingertips. ▶ GUIDED EXERCISES FOR PRACTICE Test your skills with a rich library of ready-to-solve triangle problems, sorted by difficulty and complete with detailed solutions, so you can strengthen your math foundation whenever you want. ▶ FORMULA SHEET ALWAYS AT HAND Having a memory lapse? Review fundamental principles, basic theorems, and all the formulas for solving triangles right in the app. Everything you need to know about the topic is in one place. ▶ CLEAN INTERFACE AND DARK THEME No complications. The UI is simple, intuitive, and includes an elegant dark theme, specifically optimized to prevent eye strain during your evening study sessions. ▶ GUARANTEED RELIABILITY Our algorithms are tested and highly optimized to ensure accurate and instant calculations every time, even for the most complex geometric and trigonometric problems. ▶ CONSTANT UPDATES AND SUPPORT The app is regularly updated to always offer you the best performance and new features. Download "Triangle Solver" today and take your math skills to the next level!

About

Tri

This app simplifies math homework with a suite of tools including area, basic, and trigonometry calculators. It offers offline access and equation solvers for first and second-degree equations, with more features planned.

Highlights
  • Offline Access
  • Area Calculator
  • Basic Calculator
  • Trigonometry Calculator
  • Unit Converter
  • Equation Solvers
Features
Read full description

Easily complete your homework with this app! Key Features: Offline Access: Use the app anytime, anywhere. Area Calculator: Quickly compute the area of shapes. Basic Calculator: Simplify everyday calculations. Trigonometry Calculator: Solve the Pythagorean theorem. Calculate trigonometric functions. Unit Converter: Convert between units with ease. Equation Solvers: Solve first-degree equations! Solve second-degree equations! And More Features Coming Soon!

Screenshots

Triangle Solver4 screens
Tri4 screens

Verdict

The call

The clearest difference is rating: Triangle Solver at 5.0 against Tri's 4.5. Triangle Solver also leads on in-app purchases (none vs 1). Tri's advantage is ratings volume (17 vs 2) and iOS requirement (12.0 vs 15.0). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Tri sells 1 one-off in-app purchase. Triangle Solver asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Triangle Solver holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Tri has 17 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Triangle Solver ships an update monthly, Tri every 2 months. The most recent releases landed on September 17, 2026 and October 5, 2026 respectively.

Scorecard5 real differences · 5 level
Triangle Solver versus Tri: the parameters behind the verdict, then further details
ParameterTriangle SolverTri
PriceFreeFree
Rating5.0 (2 ratings) — better4.5 (17 ratings)
Positive reviews—66.7% of reviews
Number of ratings217 — better
Update frequencyMonthly — betterEvery 2 months
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size47 MB48 MB
Age rating4+4+
DeveloperFrancesco VarottiAlejandro Apodaca

Customer experience

Triangle Solver

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Tri

All ratings17 ratings
Positive88.2%
Neutral0.0%
Negative11.8%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

Triangle Solver

No in-app purchases

1 purchases

Tri

One-time1
  • Quitar anuncios$1.99

Questions

Is Triangle Solver free?
Triangle Solver is free to download, with no in-app purchases.
Is Tri free?
Tri is free to download, with in-app purchases available.
Which has better reviews, Triangle Solver or Tri?
Triangle Solver is rated higher. Triangle Solver averages 5.0 out of 5 from 2 ratings, while Tri averages 4.5 from 17 ratings.
Do Triangle Solver or Tri have ads?
Both Triangle Solver and Tri show ads.
Which is updated more often, Triangle Solver or Tri?
Triangle Solver ships an update monthly, and Tri every 2 months. Most recently, Triangle Solver was updated on September 17, 2026 and Tri on October 5, 2026.

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