# Chemical Equation vs Periodic

The clearest difference is in-app purchases: Periodic at none against Chemical Equation's 1. Periodic also leads on update cadence (every 5 weeks vs every 5 months). Chemical Equation's advantage is iOS requirement (10.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Chemical Equation sells 1 one-off in-app purchase. Periodic asks for nothing beyond the download.

Chemical Equation ships an update every 5 months, Periodic every 5 weeks. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Chemical Equation | Periodic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/chemical-equation/id1324905142/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 70 MB | 35 MB |
| Requires iOS | **10.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Trung Nguyen Trong](https://appshunter.io/developer/1320563333) | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) |

## What reviewers say

### Chemical Equation

[App page](https://appshunter.io/ios/app/chemical-equation/id1324905142)

This educational app provides a comprehensive resource for chemistry students. It features a vast database of chemical equations, a periodic table, and tools for balancing equations and calculating molecular weights. It also includes useful reference tables for solubility and metal activity.

**Highlights:** 6000+ chemical equations, Periodic Table, Solubility Rules Table, Activity Of Metals, Molecular Weight Calculator, Balance Chemical Equation, Isotopes

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads And Use Offline | $1.99 | one-time |


### Periodic

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chemical Equation free?

Chemical Equation is free to download, with in-app purchases available.

### Is Periodic free?

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

### Do Chemical Equation or Periodic have ads?

Both Chemical Equation and Periodic show ads.

### Which is updated more often, Chemical Equation or Periodic?

Chemical Equation ships an update every 5 months, and Periodic every 5 weeks. Most recently, Chemical Equation was updated on October 17, 2026 and Periodic on October 12, 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.*