Triangle Solver vs Isosceles Triangle
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.
Isosceles Triangle
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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.
Screenshots
Verdict
The clearest difference is in-app purchases: Triangle Solver at none against Isosceles Triangle's 8. Triangle Solver also leads on iOS requirement (9.0 vs 15.0). Isosceles Triangle's advantage is update cadence (every 3 weeks vs every 21 months). 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. Isosceles Triangle sells 8 one-off in-app purchases. Triangle Solver asks for nothing beyond the download.
Triangle Solver ships an update every 21 months, Isosceles Triangle every 3 weeks. The most recent releases landed on October 3, 2026 and September 24, 2026 respectively.
| Parameter | Triangle Solver | Isosceles Triangle |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (31 ratings) — better | — |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 31 — better | — |
| Update frequency | Every 21 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 97 MB | 180 MB |
| Age rating | 4+ | 4+ |
| Developer | William Jockusch | Glindemann, Sennoun, Langer GbR |
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
Isosceles Triangle
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Triangle Solver
No in-app purchases
Isosceles Triangle
- +30 User Tokens$0.29
- +1 Convenience Token / 6h, max. +2$0.59
- +150 User Tokens$0.99
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- +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
Questions
Is Triangle Solver free?
Is Isosceles Triangle free?
Do Triangle Solver or Isosceles Triangle have ads?
Which is updated more often, Triangle Solver or Isosceles Triangle?
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