# Open vs Periodic Table..

The clearest difference is in-app purchases: Open at none against Periodic Table..'s 2. Open also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Periodic Table.. sells 2 in-app purchases, starting at $1.99 per month. Open asks for nothing beyond the download.

## The numbers

| Metric | Open | Periodic Table.. |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Size | 61 MB | 355 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fundación Ibercivis](https://appshunter.io/developer/1475077479) | [Olga Ivanova](https://appshunter.io/developer/1733570435) |

## What reviewers say

### Open

[App page](https://appshunter.io/ios/app/open-red/id6772456232)

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

**In-app purchases:** none


### Periodic Table..

[App page](https://appshunter.io/ios/app/periodic-table/id6812575885)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| periodictable_by_oliva_subscription | $1.99 | per month |
| periodictable_by_oliva_donation | $1.99 | one-time |


## Frequently asked questions

### Is Open free?

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

### Is Periodic Table.. free?

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

### Do Open or Periodic Table.. have ads?

Periodic Table.. shows ads; Open does not.

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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.*