U.S. Army STARS Elements vs Periodic Table Watch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
U.S. Army STARS Elements
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.
- Atom Builder
- SmashBond game
- Interactive Periodic Table
- STARS Challenge quiz
- 3D atom construction
- Bohr's model visualization
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U.S. Army STARS Elements is a fun and exciting way to learn chemistry. Build your own atom, play a game to help you learn about chemical bonds, explore the periodic table, and test your chemistry knowledge. Elements is great for students, teachers, and anyone interested in chemistry. U.S. Army STARS Elements includes... Atom Builder - A simple, powerful tool that let’s you construct and discover atoms. Add and subtract protons, neutrons, and electrons and see, in 3D, what you can create. SmashBond - Use the octet rule to bond elements and score points in SmashBond. Swap elements to make 2, 3, or 4 element bonds, and grab bonuses to get a SMASHBOND. It’s a really fun way to help you become familiar with the octet rule and learn common chemical bonds by their type, symbol, name and Lewis dot diagram. Periodic Table - Use the table to view trends and detailed information about each of the 118 elements. See an interactive Bohr’s model and learn interesting facts about the elements. It’s like a regular periodic table, but interactive and fun. STARS Challenge - When you’re ready to test your knowledge, take the STARS Challenge. You’ll be presented with questions in 3 areas (elements, bonding, and atomic configuration). Can you master them all? No matter what your level of experience with chemistry, U.S. Army STARS Elements makes learning fun. Easy to use lesson plans and teacher guides are available at http://usarmystars.com/lessons to help integrate Elements into the classroom.
Periodic Table Watch
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Two different Periodic Table clocks displays: The simple clock display shows the Atomic Number and either Atomic Weight or Name. Colors indicate Phase: Solid, Liquid, or Gas. Tap to toggle seconds on or off; long-press to switch between Atomic Weight and Element Name. The Complete clock display shows all available information about each element. There's also a scrollable reference view that shows all of the elements, which can be set up as flashcards to test your knowledge.
Screenshots
Verdict
The clearest difference is price: U.S. Army STARS Elements at Free against Periodic Table Watch's $0.99. U.S. Army STARS Elements also leads on iOS requirement (11.0 vs 26.0). On update cadence, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
U.S. Army STARS Elements is free to download; Periodic Table Watch costs $0.99 up front. 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 Table Watch every 9 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.
| Parameter | U.S. Army STARS Elements | Periodic Table Watch |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.6 (19 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 19 — better | — |
| Update frequency | Every 8 months — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 11.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 213 MB | 6 MB |
| Age rating | 9+ | 4+ |
| Developer | Army Game Studio | Jim Haungs |
In-app purchases
U.S. Army STARS Elements
No in-app purchases
Periodic Table Watch
No in-app purchases
Questions
Is U.S. Army STARS Elements free?
Is Periodic Table Watch free?
Do U.S. Army STARS Elements or Periodic Table Watch have ads?
Which is updated more often, U.S. Army STARS Elements or Periodic Table Watch?
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