# U.S. Army STARS Elements vs Trigonometry and functions

The clearest difference is price: U.S. Army STARS Elements at Free against Trigonometry and functions's $3.99. U.S. Army STARS Elements also leads on iOS requirement (11.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

U.S. Army STARS Elements is free to download; Trigonometry and functions costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | U.S. Army STARS Elements | Trigonometry and functions |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.6 (19 ratings)](https://appshunter.io/ios/app/us-army-stars-elements/id1103901837/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | — |
| Monetization | Free | — |
| Size | 213 MB | 1 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 9+ | 4+ |
| Developer | [Army Game Studio](https://appshunter.io/developer/540858534) | [Gomathy Shankaran](https://appshunter.io/developer/503956143) |

## What reviewers say

### U.S. Army STARS Elements

[App page](https://appshunter.io/ios/app/us-army-stars-elements/id1103901837)

Explore the world of chemistry with interactive tools to build atoms, learn chemical bonds, and discover elements. Test your knowledge with engaging challenges designed for students, teachers, and enthusiasts.

**Highlights:** Atom Builder, SmashBond game, Interactive Periodic Table, STARS Challenge quiz, 3D atom construction, Bohr's model visualization

**Features:** macOS Compatibility

**In-app purchases:** none


### Trigonometry and functions

[App page](https://appshunter.io/ios/app/trigonometry-and-functions/id6739970869)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is U.S. Army STARS Elements free?

U.S. Army STARS Elements is free to download, with no in-app purchases.

### Is Trigonometry and functions free?

Trigonometry and functions costs $3.99, with no in-app purchases.

### Do U.S. Army STARS Elements or Trigonometry and functions have ads?

Neither U.S. Army STARS Elements nor Trigonometry and functions shows ads.

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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.*