# Floow.ai vs PDB Viewer

The clearest difference is in-app purchases: Floow.ai at none against PDB Viewer's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PDB Viewer sells 1 one-off in-app purchase. Floow.ai asks for nothing beyond the download.

Floow.ai ships an update every 3 weeks, PDB Viewer monthly. The most recent releases landed on October 23, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Floow.ai | PDB Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 61 MB | 2 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AIROC B.V.](https://appshunter.io/developer/1696087212) | [Qvyshift LLC](https://appshunter.io/developer/1536442361) |

## What reviewers say

### Floow.ai

[App page](https://appshunter.io/ios/app/floowai/id6751500520)

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

**In-app purchases:** none


### 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 Floow.ai free?

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

### Is PDB Viewer free?

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

### Do Floow.ai or PDB Viewer have ads?

Neither Floow.ai nor PDB Viewer shows ads.

### Which is updated more often, Floow.ai or PDB Viewer?

Floow.ai ships an update every 3 weeks, and PDB Viewer monthly. Most recently, Floow.ai was updated on October 23, 2026 and PDB Viewer on October 16, 2026.

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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.*