# Sunder vs Folio

The clearest difference is in-app purchases: Sunder at none against Folio's 1. Sunder also leads on update cadence (daily vs every 3 weeks) and iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

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

Sunder ships an update daily, Folio every 3 weeks. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Sunder | Folio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 weeks |
| Size | 29 MB | 44 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Watts](https://appshunter.io/developer/1867056391) | [Dinh Bao Thang Duong](https://appshunter.io/developer/1529449646) |

## What reviewers say

### Sunder

[App page](https://appshunter.io/ios/app/sunder-soon-or-later/id6757450271)

**Features:** macOS Compatibility

**In-app purchases:** none


### Folio

[App page](https://appshunter.io/ios/app/folio-markdown-library/id6765871325)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is Sunder free?

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

### Is Folio free?

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

### Do Sunder or Folio have ads?

Neither Sunder nor Folio shows ads.

### Which is updated more often, Sunder or Folio?

Sunder ships an update daily, and Folio every 3 weeks. Most recently, Sunder was updated on October 20, 2026 and Folio on October 25, 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.*