# ตารางธาตุ Periodic Table vs Online A Big

The clearest difference is in-app purchases: ตารางธาตุ Periodic Table at none against Online A Big's 8. ตารางธาตุ Periodic Table also leads on iOS requirement (8.0 vs 15.1). Online A Big's advantage is update cadence (every 4 weeks vs every 29 months). On price, ads and device support there is nothing between them.

Both are free to download. Online A Big sells 5 one-off in-app purchases. ตารางธาตุ Periodic Table asks for nothing beyond the download.

ตารางธาตุ Periodic Table ships an update every 29 months, Online A Big every 4 weeks. The most recent releases landed on October 26, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | ตารางธาตุ Periodic Table | Online A Big |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 4 weeks** |
| Size | 6 MB | 31 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kobkiat Saraubon](https://appshunter.io/developer/718821766) | [COURSE SQUARE COMPANY LIMITED](https://appshunter.io/developer/1131668582) |

## What reviewers say

### ตารางธาตุ Periodic Table

[App page](https://appshunter.io/ios/app/periodic-table/id1028979160)

**In-app purchases:** none


### Online A Big

[App page](https://appshunter.io/ios/app/online-a-big/id1493494981)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ตะลุยโจทย์เคมี 9 วิชาสามัญ | $84.99 | one-time |
| ตะลุยโจทย์เคมี PAT2 | $84.99 | one-time |
| ตะลุยโจทย์เคมี 9 วิชาสามัญ | $89.99 | one-time |
| Org. Chem 1 เคมีมหาวิทยาลัย | $199.99 | one-time |
| Org. Chem 2 เคมีมหาวิทยาลัย | $199.99 | one-time |


## Frequently asked questions

### Is ตารางธาตุ Periodic Table free?

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

### Is Online A Big free?

Online A Big is free to download, with in-app purchases available.

### Do ตารางธาตุ Periodic Table or Online A Big have ads?

Neither ตารางธาตุ Periodic Table nor Online A Big shows ads.

### Which is updated more often, ตารางธาตุ Periodic Table or Online A Big?

ตารางธาตุ Periodic Table ships an update every 29 months, and Online A Big every 4 weeks. Most recently, ตารางธาตุ Periodic Table was updated on October 26, 2026 and Online A Big on November 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*