# Trigonometry Master vs e

The clearest difference is price: e at Free against Trigonometry Master's $12.99. e also leads on update cadence (fortnightly vs every 10 months). Trigonometry Master's advantage is device support (4 vs 2) and iOS requirement (11.0 vs 16.0). On ads and in-app purchases there is nothing between them.

e is free to download; Trigonometry Master costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Trigonometry Master ships an update every 10 months, e fortnightly. The most recent releases landed on September 10, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | Trigonometry Master | e |
| --- | --- | --- |
| Price | $12.99 | **Free** |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/trigonometry-master/id1389001905/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 12 MB | 73 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Intemodino Group s.r.o.](https://appshunter.io/developer/557849644) | [Esse-ti srl](https://appshunter.io/developer/1278902596) |

## What reviewers say

### Trigonometry Master

[App page](https://appshunter.io/ios/app/trigonometry-master/id1389001905)

Easily calculate unknown sides, angles, area, and perimeter of any triangle. Supports both right and oblique triangles with visual input modes and adjustable decimal places for accuracy. Includes a history tape and email sharing for recent calculations.

**Highlights:** Solves right and oblique triangles, Calculates sides, angles, area, perimeter, Draws calculated triangles, Supports degrees and radians, Visual input modes, Adjustable decimal places, History tape and email results

**Features:** Vision Pro support

**In-app purchases:** none


### e

[App page](https://appshunter.io/ios/app/e-stant-go/id6475674463)

**In-app purchases:** none


## Frequently asked questions

### Is Trigonometry Master free?

Trigonometry Master costs $12.99, with no in-app purchases.

### Is e free?

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

### Do Trigonometry Master or e have ads?

Neither Trigonometry Master nor e shows ads.

### Which is updated more often, Trigonometry Master or e?

Trigonometry Master ships an update every 10 months, and e fortnightly. Most recently, Trigonometry Master was updated on September 10, 2026 and e on May 16, 2026.

---

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