# U.S. Army STARS Elements vs Periodic

The clearest difference is ads: U.S. Army STARS Elements at none against Periodic's shown. U.S. Army STARS Elements also leads on iOS requirement (11.0 vs 15.1). Periodic's advantage is update cadence (every 5 weeks vs every 8 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

U.S. Army STARS Elements ships an update every 8 months, Periodic every 5 weeks. The most recent releases landed on August 25, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | U.S. Army STARS Elements | Periodic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (18 ratings)](https://appshunter.io/ios/app/us-army-stars-elements/id1103901837/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 213 MB | 35 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Army Game Studio](https://appshunter.io/developer/540858534) | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) |

## 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


### Periodic

[App page](https://appshunter.io/ios/app/periodic-table-elements/id1628647298)

**Features:** macOS Compatibility

**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 Periodic free?

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

### Do U.S. Army STARS Elements or Periodic have ads?

Periodic shows ads; U.S. Army STARS Elements does not.

### Which is updated more often, U.S. Army STARS Elements or Periodic?

U.S. Army STARS Elements ships an update every 8 months, and Periodic every 5 weeks. Most recently, U.S. Army STARS Elements was updated on August 25, 2026 and Periodic on May 16, 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.*