atom.sim vs Formula Conversion
Price, ratings, monetisation and update history for both apps, side by side — 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.
Formula Conversion
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It is a formula conversion application. You can print a formula or a modified formula. You can save unmodified formulas to your phone's storage medium and then open it if necessary. Upgrading An application without an upgrade is limited to 24 formula conversions. If you want to convert the formula more than ten times, you must make an in-app purchase. Creating and opening a formula You can open the formula by clicking the first button on the toolbar. You can create a new formula using the symbols, symbols, numbers, and letters on the keyboard. You can change the font size of letters and symbols by pressing the "alp." Or "ALP." And "sym." Or "SYM." Buttons on the toolbar. If you wish, you can delete the characters by pressing the "del." Key. And use the arrows to move between the elements of the formula. Formatting the formula You can format the formula by first selecting the characters you want to change. The selection key is "Sel.", And you can then select by scrolling between the elements of the formula or by pressing the finger on the desired character. You can format the selected formula by pressing the second button on the toolbar from the back. You can change the font, font size, font, and font color Saving and printing the sample You can save the formula by pressing another button on the toolbar. Press the third button on the toolbar to print. If you want to delete the saved formulas, press the fourth button on the toolbar. Converting a formula When the formula is ready, you can publish parts of the formula. To publish part of a formula, select the item with the cursor. Press the fifth button on the toolbar to publish the formula. You can also print the converted formula by clicking the "Print" button. Zoom a formula If you want to increase or decrease the formula, press the third button on the back of the toolbar.
Screenshots
Verdict
The clearest difference is in-app purchases: atom.sim at none against Formula Conversion's 1. atom.sim also leads on update cadence (every 7 months vs every 26 months). On price, ads, device support and iOS requirement 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
Both are free to download. Formula Conversion sells 1 one-off in-app purchase. atom.sim asks for nothing beyond the download.
atom.sim ships an update every 7 months, Formula Conversion every 26 months. The most recent releases landed on October 11, 2026 and September 29, 2026 respectively.
| Parameter | atom.sim | Formula Conversion |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 7 months — better | Every 26 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 14.1 — better |
| Further details — not scored | ||
| Size | 78 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Hans Kovi | Janek Soomets |
In-app purchases
atom.sim
No in-app purchases
Formula Conversion
- Upgrade Formula Conversion$3.99
Questions
Is atom.sim free?
Is Formula Conversion free?
Do atom.sim or Formula Conversion have ads?
Which is updated more often, atom.sim or Formula Conversion?
Other comparisons
