# Periodic vs CosmicTelescope

The clearest difference is price: CosmicTelescope at Free against Periodic's $1.99. On ads, in-app purchases, device support and iOS requirement there is nothing between them.

CosmicTelescope is free to download; Periodic costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Periodic | CosmicTelescope |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Size | 31 MB | 28 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) | [PIETRO BERGAMINI](https://appshunter.io/developer/6800230336) |

## What reviewers say

### Periodic

[App page](https://appshunter.io/ios/app/periodic-table-elements-pro/id1628646759)

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

**In-app purchases:** none


### CosmicTelescope

[App page](https://appshunter.io/ios/app/cosmictelescope/id6800230334)

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

**In-app purchases:** none


## Frequently asked questions

### Is Periodic free?

Periodic costs $1.99, with no in-app purchases.

### Is CosmicTelescope free?

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

### Do Periodic or CosmicTelescope have ads?

Neither Periodic nor CosmicTelescope 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.*