# PHD Helper vs Folio

The clearest difference is in-app purchases: Folio at none against PHD Helper's 1. Folio also leads on device support. On price and iOS requirement there is nothing between them.

Both are free to download. PHD Helper sells 1 one-off in-app purchase. Folio asks for nothing beyond the download.

## The numbers

| Metric | PHD Helper | Folio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | — | No |
| Update frequency | — | Weekly |
| Size | 41 MB | 6 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lauren Gilman](https://appshunter.io/developer/1880124860) | [Saksham Gupta](https://appshunter.io/developer/6786129731) |

## What reviewers say

### PHD Helper

[App page](https://appshunter.io/ios/app/phd-helper/id6760105075)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Me A Coffee | $4.99 | one-time |


### Folio

[App page](https://appshunter.io/ios/app/folio-research-feed/id6786129729)

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

**In-app purchases:** none


## Frequently asked questions

### Is PHD Helper free?

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

### Is Folio free?

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

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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.*