# Sailing School vs Isosceles Triangle PRO

The clearest difference is price: Sailing School at Free against Isosceles Triangle PRO's $2.99. Sailing School also leads on ratings volume (10 vs 2). Isosceles Triangle PRO's advantage is rating (5.0 vs 4.4) and ads (none vs shown). On in-app purchases, monetization model, device support and iOS requirement there is nothing between them.

Sailing School is free to download; Isosceles Triangle PRO costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Isosceles Triangle PRO holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Sailing School has 10 ratings behind it against 2, so its average is the more settled of the two.

Sailing School ships an update every 4 months, Isosceles Triangle PRO monthly. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Sailing School | Isosceles Triangle PRO |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [4.4 (10 ratings)](https://appshunter.io/ios/app/sailing-school/id500663978/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/isosceles-triangle-pro/id1568944096/reviews)** |
| Number of ratings | **10** | 2 |
| Positive reviews | 47.6% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Paid | Paid |
| Size | 38 MB | 180 MB |
| Requires iOS | **14.5** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nautica SIA](https://appshunter.io/developer/486201925) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Sailing School

[App page](https://appshunter.io/ios/app/sailing-school/id500663978)

Learn to sail with this comprehensive, interactive app. Access a vast library of lessons, videos, and quizzes covering all essential aspects of sailing, from basics to advanced navigation. Track your progress and prepare for tests with engaging content.

**Highlights:** Interactive lessons with graphics and audio, Extensive video library (6+ hours), Animated visuals for concepts, Knowledge testing exams, Progress tracking statistics, Offline access to content

**Features:** macOS Compatibility

**In-app purchases:** none


### Isosceles Triangle PRO

[App page](https://appshunter.io/ios/app/isosceles-triangle-pro/id1568944096)

Calculate all properties of an isosceles triangle, whether acute or obtuse. Input known values to see formulas and results. Supports decimals, fractions, and step-by-step solutions with history saving and sharing.

**Highlights:** Calculate all isosceles triangle quantities, Display formulas for calculations, Supports acute and obtuse triangles, Handles decimals and fractions, Step-by-step solution display, History function for saved calculations, Adjustable decimal places

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

**In-app purchases:** none


## Frequently asked questions

### Is Sailing School free?

Sailing School is free to download, with no in-app purchases.

### Is Isosceles Triangle PRO free?

Isosceles Triangle PRO costs $2.99, with no in-app purchases.

### Which has better reviews, Sailing School or Isosceles Triangle PRO?

Isosceles Triangle PRO is rated higher. Sailing School averages 4.4 out of 5 from 10 ratings, while Isosceles Triangle PRO averages 5.0 from 2 ratings.

### Do Sailing School or Isosceles Triangle PRO have ads?

Sailing School shows ads; Isosceles Triangle PRO does not.

### Which is updated more often, Sailing School or Isosceles Triangle PRO?

Sailing School ships an update every 4 months, and Isosceles Triangle PRO monthly. Most recently, Sailing School was updated on October 23, 2026 and Isosceles Triangle PRO on October 21, 2026.

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