Triangle Solver vs Pythagoras Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Triangle Solver
Calculate unknown sides and angles of a triangle with ease. Supports various input combinations, including two angles and one side, two sides and one angle, or three sides.
- Calculate unknown sides
- Calculate unknown angles
- Two angles and one side input
- Two sides and one angle input
- Three sides input
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If you know two angles and one side of a triangle, quickly and easily calculate the rest. Also handles cases where you know two sides and one angle, or three sides and no angles.
Pythagoras Calculator
Easily calculate any side of a right-angled triangle using the Pythagorean theorem. Input two sides to find the third, with all calculations saved in a history. Supports fractions and offers an ad-free option.
- Pythagorean theorem calculations
- Calculate any of the three sides
- History of calculations
- Supports fraction input
- Shareable solutions
- Ad-free option
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Finish your homework instantly. Prepare for exams without stress. Free, complete step-by-step solutions. Enter two sides and calculate the third using the Pythagorean theorem. HOW IT WORKS Enter your values in 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. We cannot draw any conclusions about you. COSTS Everything is free to use. 24/7 access to your solutions. All solution steps are always fully available. If you need many solutions in a short time, various purchase options are available. EXTRAS - 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.
Screenshots
Verdict
The clearest difference is in-app purchases: Triangle Solver at none against Pythagoras Calculator's 8. Triangle Solver also leads on iOS requirement (9.0 vs 15.0). Pythagoras Calculator's advantage is update cadence (every 3 weeks vs every 21 months) and rating (4.6 vs 4.2). On price, 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
Both are free to download. Pythagoras Calculator sells 8 one-off in-app purchases. Triangle Solver asks for nothing beyond the download.
Pythagoras Calculator holds the better App Store score, 4.6 against 4.2. That said, the two scores are not equally well evidenced: Pythagoras Calculator has 242 ratings behind it against 31, so its average is the more settled of the two. Written reviews point the same way: 75% of Triangle Solver's written reviews are positive against 83% of Pythagoras Calculator's.
Triangle Solver ships an update every 21 months, Pythagoras Calculator every 3 weeks. The most recent releases landed on October 3, 2026 and October 13, 2026 respectively.
| Parameter | Triangle Solver | Pythagoras Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (31 ratings) | 4.6 (242 ratings) — better |
| Positive reviews | 75.0% of reviews | 83.0% of reviews — better |
| Number of ratings | 31 | 242 — better |
| Update frequency | Every 21 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 97 MB | 179 MB |
| Age rating | 4+ | 4+ |
| Developer | William Jockusch | Glindemann, Sennoun, Langer GbR |
Customer experience
Triangle Solver
Pythagoras Calculator
User reviews
Triangle Solver
From 31 App Store ratingsWhat we love
- 👍 Simple and easy to use
- 📐 Accurate calculations
- ✨ Ad-free experience
- 📐 Dynamic triangle diagram
- 🚀 Quick results
Room to improve
- 🐛 Crashes frequently
- 🐛 Stopped working on iOS
- 🐛 Input fields not clear
- 🐛 Ads can be intrusive
- 🐛 Difficult to use with irrational numbers
Pythagoras Calculator
From 242 App Store ratingsWhat we love
- 👍 Easy to use and simple interface
- ✅ Accurate calculations for Pythagorean theorem
- 📚 Shows step-by-step solutions for learning
- 🚀 Fast and efficient computation
- 💼 Useful for construction and woodworking projects
Room to improve
- 📢 Intrusive and annoying advertisements
- 💳 Deceptive payment practices and fraudulent charges
- 🔐 Suspicious credit card requirements for access
- ⚠️ Forced rating prompts
- ❌ Limited functionality (only works with 2 known sides)
Bugs and requests
Triangle Solver
Reported bugs
10 issues- Stopped working on iPhone and iPad
- App crashes
- Won't open on older devices
- Doesn't allow value entry
- Input fields not clear
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- Buttons are tiny and difficult to read
- Gives NAN answers
- Erases input when typing numbers
- Screen jumps when entering values
- Cannot enter any variables after upgrade
Requested features
6 requests- Add switch to radians feature
- Allow input of irrational numbers
- Show steps for solving problems
- Triangle shape changes to match values for accurate scale
- Option to use app sideways for larger keyboard
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- Ability to use squares
Pythagoras Calculator
Reported bugs
6 issues- App crashes or fails to calculate
- Paid ad removal not working properly
- Fraudulent payment processing through third-party sites
- Occasional incorrect calculation results
- App not functioning on iPhone 5SE and older devices
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- Persistent ads despite payment for removal
Requested features
6 requests- Calculate triangle angles
- Support angle-based calculations with one side
- Better monetization without aggressive ads
- Improved ratings system
- Real-time results display
Show 1 moreShow fewer
- Support for non-right triangles
In-app purchases
Triangle Solver
No in-app purchases
Pythagoras Calculator
- +30 User Tokens$0.29
- +1 Convenience Token / 6h, max. +2$0.59
- +2 Convenience Tokens / 6h, max. +4$0.99
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- +150 User Tokens$0.99
- +300 User Tokens$1.49
- +4 Convenience Tokens / 6h, max. +8$1.59
- Remove Ads$1.99
- Lifetime Access$1.99
Questions
Is Triangle Solver free?
Is Pythagoras Calculator free?
Which has better reviews, Triangle Solver or Pythagoras Calculator?
Do Triangle Solver or Pythagoras Calculator have ads?
Which is updated more often, Triangle Solver or Pythagoras Calculator?
Other comparisons
