# MoonStar vs PDB Viewer

The clearest difference is iOS requirement: PDB Viewer at 16.0 against MoonStar's 26.5. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. MoonStar sells 2 in-app purchases, starting at $2.99 per month and PDB Viewer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | MoonStar | PDB Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Monthly |
| Size | 23 MB | 2 MB |
| Requires iOS | 26.5 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Syahrul Ahmad Saputra](https://appshunter.io/developer/6772712884) | [Qvyshift LLC](https://appshunter.io/developer/1536442361) |

## What reviewers say

### MoonStar

[App page](https://appshunter.io/ios/app/moonstar-sky-scanner/id6776302182)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access Monthly | $2.99 | per month |
| Premium Access Yearly | $29.99 | per year |


### PDB Viewer

[App page](https://appshunter.io/ios/app/pdb-viewer-3d-molecules/id6777468488)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDB Viewer Pro | $9.99 | one-time |


## Frequently asked questions

### Is MoonStar free?

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

### Is PDB Viewer free?

PDB Viewer is free to download, with in-app purchases available.

### Do MoonStar or PDB Viewer have ads?

Neither MoonStar nor PDB Viewer 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.*