# Triangle Solver vs Pythagoras Calculator

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.

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.

## The numbers

| Metric | Triangle Solver | Pythagoras Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (31 ratings)](https://appshunter.io/ios/app/triangle-solver/id383052814/reviews) | **[4.6 (242 ratings)](https://appshunter.io/ios/app/pythagoras-calculator/id1270384222/reviews)** |
| Number of ratings | 31 | **242** |
| Positive reviews | 75.0% of reviews | **83.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 97 MB | 179 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [William Jockusch](https://appshunter.io/developer/342126227) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Triangle Solver

[App page](https://appshunter.io/ios/app/triangle-solver/id383052814)

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.

**Highlights:** Calculate unknown sides, Calculate unknown angles, Two angles and one side input, Two sides and one angle input, Three sides input

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 📐 Accurate calculations
- ✨ Ad-free experience
- 📐 Dynamic triangle diagram
- 🚀 Quick results

**What reviewers complain about**

- 🐛 Crashes frequently
- 🐛 Stopped working on iOS
- 🐛 Input fields not clear
- 🐛 Ads can be intrusive
- 🐛 Difficult to use with irrational numbers

**Reported bugs**

- Stopped working on iPhone and iPad
- App crashes
- Won't open on older devices
- Doesn't allow value entry
- Input fields not clear

**Requested features**

- 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


### Pythagoras Calculator

[App page](https://appshunter.io/ios/app/pythagoras-calculator/id1270384222)

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.

**Highlights:** Pythagorean theorem calculations, Calculate any of the three sides, History of calculations, Supports fraction input, Shareable solutions, Ad-free option

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $1.99 | one-time |
| Lifetime Access | $1.99 | one-time |

**What reviewers like**

- 👍 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

**What reviewers complain about**

- 📢 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)

**Reported bugs**

- 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

**Requested features**

- Calculate triangle angles
- Support angle-based calculations with one side
- Better monetization without aggressive ads
- Improved ratings system
- Real-time results display


## Frequently asked questions

### Is Triangle Solver free?

Triangle Solver is free to download, with no in-app purchases.

### Is Pythagoras Calculator free?

Pythagoras Calculator is free to download, with in-app purchases available.

### Which has better reviews, Triangle Solver or Pythagoras Calculator?

Pythagoras Calculator is rated higher. Triangle Solver averages 4.2 out of 5 from 31 ratings, while Pythagoras Calculator averages 4.6 from 242 ratings.

### Do Triangle Solver or Pythagoras Calculator have ads?

Neither Triangle Solver nor Pythagoras Calculator shows ads.

### Which is updated more often, Triangle Solver or Pythagoras Calculator?

Triangle Solver ships an update every 21 months, and Pythagoras Calculator every 3 weeks. Most recently, Triangle Solver was updated on October 3, 2026 and Pythagoras Calculator on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*