Comparison

U.S. Army STARS Elements vs Periodic

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Atom Builder
  • SmashBond game
  • Interactive Periodic Table
  • STARS Challenge quiz
  • 3D atom construction
  • Bohr's model visualization
Features
Read full description

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.

About

Periodic

Features
Read full description

The PeriodicTableElements is an elegant app that is interactive and fun. Easy to use, easy to understand, simple and effective. It shows the periodic table of elements in variety of ways 1) Classic grid with name that is color coded. You can configure it to look however you like. 2) Visually appealing electron distribution. 3) Visually appealing Lewis dot structure. 4) List that can be sorted based on different element properties like group, period, category etc. These awesome periodic tables can be shared by simple double click anywhere on the table. It is possible to copy the periodic table diagrams as high quality SVG xml. Drag your finger on the periodic table canvas to update elements automatically or tap on an element to see more details. Tap on an element and all the rest of the related elements are highlighted. Details of a selected element is shown in a beautifully drawn animated element. Tap on the animated element and you will see more details that can also be shared. Tapping on the list element will navigate you to a page that shows details of the element. It automatically saves your hard work locally on your device so you can come back and pick up from where you left off as your great effort will not be lost. This is a perfect app if you are a student learning chemistry. This is an app for all student groups. From high school to college to university students. Be creative. Enjoy the app!

Screenshots

U.S. Army STARS Elements4 screens
Periodic4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
U.S. Army STARS Elements versus Periodic: the parameters behind the verdict, then further details
ParameterU.S. Army STARS ElementsPeriodic
PriceFreeFree
Rating4.7 (18 ratings) — better
Positive reviews100.0% of reviews
Number of ratings18 — better
Update frequencyEvery 8 monthsEvery 5 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.1
Further details — not scored
Size213 MB35 MB
Age rating9+4+
DeveloperArmy Game StudioOm Prakash Chapagain

In-app purchases

None

U.S. Army STARS Elements

No in-app purchases

None

Periodic

No in-app purchases

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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