# Periodic Table vs Learning transistor

The clearest difference is device support: Periodic Table at 3 against Learning transistor's 1. Periodic Table also leads on iOS requirement (13.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Periodic Table sells 2 in-app purchases, starting at $2.99 per 7 days and Learning transistor sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Periodic Table | Learning transistor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Size | 228 MB | 1 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [hongmei shen](https://appshunter.io/developer/1850608388) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### Periodic Table

[App page](https://appshunter.io/ios/app/periodic-table-chem-ai/id6759190068)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $2.99 | per 7 days |
| Premium Annual | $29.99 | per year |


### Learning transistor

[App page](https://appshunter.io/ios/app/learning-transistor/id6792466363)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $4.99 | one-time |


## Frequently asked questions

### Is Periodic Table free?

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

### Is Learning transistor free?

Learning transistor is free to download, with in-app purchases available.

### Do Periodic Table or Learning transistor have ads?

Neither Periodic Table nor Learning transistor shows ads.

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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.*