# Visual Trig Func vs E

The clearest difference is price: Visual Trig Func at Free against E's $9.99. Visual Trig Func also leads on review sentiment (61% vs 33%) and device support (3 vs 1). E's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence there is nothing between them.

Visual Trig Func is free to download; E costs $9.99 up front. Visual Trig Func sells 1 one-off in-app purchase. E asks for nothing beyond the download.

Visual Trig Func ships an update every 5 months, E every 3 months. The most recent releases landed on October 4, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | Visual Trig Func | E |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/visual-trig-func/id645214237/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **61.1% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 4 MB | 174 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [F-NET Apps](https://appshunter.io/developer/537078708) | [Suzuki Educational Software Co.,Ltd.](https://appshunter.io/developer/585512975) |

## What reviewers say

### Visual Trig Func

[App page](https://appshunter.io/ios/app/visual-trig-func/id645214237)

This app visually demonstrates trigonometric functions, making them easier to understand and calculate. It offers interactive tools for exploring values, viewing wave graphs, and accessing lists of trigonometric ratios. Ideal for students and educators seeking a clearer grasp of trigonometry.

**Highlights:** Visual trigonometric functions, Interactive radius and angle manipulation, Comprehensive lists of trig ratios, Wave graph visualizations, Adjustable values via text fields, Tap-to-check degree and value functionality

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add Calculation 360!   (You can calc trig functions for over 90 degrees.) | $0.99 | one-time |


### E

[App page](https://appshunter.io/ios/app/e-volvox/id1117257383)

Organize and visualize information by joining round plates into rings. Add text, photos, videos, and illustrations to plates, then structure them into themes. Plates can be displayed in 3D and enlarged for presentations.

**Highlights:** Add media to round plates, Join plates into rings for themes, Structure plates by associating with other rings/plates, 3D plate display, Enlarge plates and flick through content, Presentation mode, Share via AirDrop, Import/export data via iTunes

**In-app purchases:** none


## Frequently asked questions

### Is Visual Trig Func free?

Visual Trig Func is free to download, with in-app purchases available.

### Is E free?

E costs $9.99, with no in-app purchases.

### Do Visual Trig Func or E have ads?

Visual Trig Func shows ads; E does not.

### Which is updated more often, Visual Trig Func or E?

Visual Trig Func ships an update every 5 months, and E every 3 months. Most recently, Visual Trig Func was updated on October 4, 2026 and E on June 4, 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.*