Comparison

Isosceles Triangle vs Triangle Calculator Pythagoras

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

Head to head
About

Isosceles Triangle

Features
Read full description

Finish homework instantly. Prepare for exams stress-free. Free, complete step-by-step solutions. Enter your values and calculate legs, base, height, angles, perimeter, and area. HOW IT WORKS Enter your values into the correct 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 anonymized data is collected, for example: - which features are used - how many solutions are generated This helps us improve. No conclusions can be drawn about you. COSTS Everything is free to use. 24/7 access to your solutions. All solution steps remain fully available at all times. If you need many solutions in a short time, various purchase options are available. EXTRAS - overview of all quantities - acute and obtuse triangles - all length units - curated learning videos - feedback on incorrect inputs - manage your own solutions - app introduction CONTACT Questions and feedback via Discord or directly in the app review.

About

Triangle Calculator Pythagoras

Solve for missing sides and angles in right and any triangle. Visualize results with values on the drawing and view step-by-step solutions. Includes a formula library and calculation history.

Highlights
  • Right triangle solver
  • Any triangle solver (SSS, SAS, ASA, AAS, SSA)
  • Visual triangle drawing with values
  • Step-by-step formula explanations
  • Formula library
  • Calculation history
  • Degrees, minutes, seconds angle input (Pro)
Features
Read full description

Solve any right triangle from two values – and any other triangle from three. RIGHT TRIANGLES (FREE) Enter any two of: leg a, leg b, hypotenuse c, angle α or angle β (at least one side). Triangle Calculator finds every missing side and angle, plus the area, perimeter and height to the hypotenuse, using the Pythagorean theorem and sine, cosine and tangent. Swap the legs with one tap; a check confirms α + β = 90°. ANY TRIANGLE Enter any three values – sides a, b, c and angles A, B, C – and solve SSS, SAS, ASA, AAS and the ambiguous SSA case. Every missing side and angle and the triangle type (acute, right, obtuse; equilateral, isosceles, scalene) are free. Pro adds area, perimeter, all three heights, inradius, circumradius and the second SSA solution. VALUES ON THE DRAWING The triangle is redrawn to the true proportions of your answer, with every value written right on it. Prefer a list? Switch to the Classic layout in Settings. SEE HOW IT'S SOLVED Each result comes with its formula and your numbers, for example c = √(3² + 4²) = 5. DEGREES, MINUTES, SECONDS (PRO) Type and read angles like 36°52′12″ – for plans, surveying and job-site work. CLEAR, HONEST ANSWERS The app tells you when values can't form a triangle – a hypotenuse shorter than a leg, sides that break the triangle inequality, or angles that add up to too much – instead of returning a wrong number. FORMULA LIBRARY & HISTORY A searchable library of right-triangle and any-triangle formulas with worked examples, and a history of your calculations to reopen any time (free keeps your last 5). EVERYWHERE YOU WORK iPhone, iPad and Mac, portrait or landscape, light or dark mode – in English, German, Japanese, Turkish, Spanish, French, Italian and Russian. On iPad and Mac: a sidebar, a full-height drawing and keyboard shortcuts. TRIANGLE CALCULATOR PRO • No ads • Full Any Triangle results: area, perimeter, heights, radii and both SSA solutions • Every step of every solution • Angles in degrees, minutes and seconds • Unlimited history and Copy All The right-triangle solver and every side and angle of any triangle are always free. Pro options and prices are shown in the app. Terms of Use: https://monsware.com/right-triangle-terms Privacy Policy: https://monsware.com/right-triangle-privacy

Screenshots

Isosceles Triangle4 screens
Triangle Calculator Pythagoras4 screens

Verdict

The call

The clearest difference is ads: Isosceles Triangle at none against Triangle Calculator Pythagoras's shown. Isosceles Triangle also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Isosceles Triangle sells 8 one-off in-app purchases and Triangle Calculator Pythagoras sells 5 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Isosceles Triangle ships an update every 3 weeks, Triangle Calculator Pythagoras every 11 days. Both last shipped on November 3, 2026.

Scorecard2 real differences · 8 level
Isosceles Triangle versus Triangle Calculator Pythagoras: the parameters behind the verdict, then further details
ParameterIsosceles TriangleTriangle Calculator Pythagoras
PriceFreeFree
Rating—4.0 (1 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 3 weeksEvery 11 days — better
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size180 MB22 MB
Age rating4+4+
DeveloperGlindemann, Sennoun, Langer GbRMuhammed Samil DEMIR

In-app purchases

8 purchases

Isosceles Triangle

One-time8
  • +30 User Tokens$0.29
  • +1 Convenience Token / 6h, max. +2$0.59
  • +150 User Tokens$0.99
Show 5 more
  • +2 Convenience Tokens / 6h, max. +4$0.99
  • +300 User Tokens$1.49
  • +4 Convenience Tokens / 6h, max. +8$1.59
  • Remove Ads$2.99
  • Lifetime Access$2.99
5 purchases

Triangle Calculator Pythagoras

Subscriptions3
  • Weekly Premium3 Days trial$1.997 Days
  • Monthly Premium3 Days trial$4.991 Month
  • Premium Yearly7 Days trial$24.991 Year
One-time2
  • Pro Lifetime$29.99
  • Pro Lifetime$49.99

Questions

Is Isosceles Triangle free?
Isosceles Triangle is free to download, with in-app purchases available.
Is Triangle Calculator Pythagoras free?
Triangle Calculator Pythagoras is free to download, with in-app purchases available.
Do Isosceles Triangle or Triangle Calculator Pythagoras have ads?
Triangle Calculator Pythagoras shows ads; Isosceles Triangle does not.
Which is updated more often, Isosceles Triangle or Triangle Calculator Pythagoras?
Isosceles Triangle ships an update every 3 weeks, and Triangle Calculator Pythagoras every 11 days. Most recently, Isosceles Triangle was updated on November 3, 2026 and Triangle Calculator Pythagoras on November 3, 2026.

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