atom.sim vs Periodic
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
atom.sim
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A simulation of the anatomy of atoms. This app shows the first 18 atoms in 3d detail, provides info about the anatomy of these atoms and shows how empty an atom is. Ideal for students in mid school and high school.
Periodic
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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
Verdict
The clearest difference is ads: atom.sim at none against Periodic's shown. Periodic's advantage is update cadence (every 5 weeks vs every 7 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
atom.sim ships an update every 7 months, Periodic every 5 weeks. The most recent releases landed on September 10, 2026 and May 16, 2026 respectively.
| Parameter | atom.sim | Periodic |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 7 months | Every 5 weeks โ better |
| Ads | No โ better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod โ better |
| Requires iOS | 15.0 โ better | 15.1 |
| Further details โ not scored | ||
| Size | 78 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Hans Kovi | Om Prakash Chapagain |
In-app purchases
atom.sim
No in-app purchases
Periodic
No in-app purchases









