# Periodic Table vs eClass

The clearest difference is in-app purchases: eClass at none against Periodic Table's 11. eClass also leads on iOS requirement (13.0 vs 16.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Periodic Table sells 9 in-app purchases, starting at $0.99 per month. eClass asks for nothing beyond the download.

Periodic Table ships an update every 6 days, eClass every 11 days. The most recent releases landed on October 19, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Periodic Table | eClass |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5.4K ratings)](https://appshunter.io/ios/app/periodic-table-chemistry-2026/id1451726577/reviews)** | — |
| Number of ratings | **5.4K** | — |
| Positive reviews | 88.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 11 days |
| Monetization | Free with in-app purchases | — |
| Size | 152 MB | 33 MB |
| Requires iOS | 16.1 | **13.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nikita Chernykh](https://appshunter.io/developer/1448243728) | [TRI LINH SERVICES AND TRADING COMPANY LIMITED](https://appshunter.io/developer/1759295019) |

## What reviewers say

### Periodic Table

[App page](https://appshunter.io/ios/app/periodic-table-chemistry-2026/id1451726577)

Explore the universe's language with this interactive chemistry app. It offers a clear, visual, and fact-based approach to understanding elements, isotopes, and chemical reactions. Ideal for students, educators, and curious minds.

**Highlights:** Interactive Periodic Table, Detailed Element Cards, 3300+ Isotopes, Molar Mass Calculator, Chemistry Dictionary, Reactions & Equations, Solubility Chart & Orbital Models

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Professional: 1 Month | $0.99 | per month |
| Professional: 6 Months | $3.99 | per 6 months |
| Professional: 6 Months | $3.99 | per 6 months |
| Professional: 1 Year | $6.99 | per year |
| Professional: 1 Year | $6.99 | per year |
| Professional: 1 Year | $14.99 | per year |
| Professional: Unlimited | $14.99 | one-time |
| Professional: Unlimited | $24.99 | one-time |
| Professional: Unlimited | $59.99 | one-time |

**What reviewers like**

- 🚀 Great app for chemistry learning
- 👍 Useful information and features
- 💡 Includes theoretical elements
- 🚀 Efficient and easy to use
- 👍 Helpful for students and professionals

**What reviewers complain about**

- 🐛 Some inaccuracies in element data
- 🔒 Paid version required for full functionality
- 🔒 Certain features locked behind paywall

**Reported bugs**

- Widget shows incorrect element positions
- Electron configuration information missing for some elements

**Requested features**

- Add Arabic language support
- Improve search functionality
- Allow full periodic table view
- Add pronunciation for element names
- Include more physical constants and data


### eClass

[App page](https://appshunter.io/ios/app/eclass/id6450642093)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Periodic Table free?

Periodic Table is free to download, with in-app purchases available.

### Is eClass free?

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

### Do Periodic Table or eClass have ads?

Neither Periodic Table nor eClass shows ads.

### Which is updated more often, Periodic Table or eClass?

Periodic Table ships an update every 6 days, and eClass every 11 days. Most recently, Periodic Table was updated on October 19, 2026 and eClass on October 13, 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.*