# Folder (hidden data) vs AstroPup View

The clearest difference is in-app purchases: AstroPup View at none against Folder (hidden data)'s 1. AstroPup View also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (18.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Folder (hidden data) sells 1 one-off in-app purchase. AstroPup View asks for nothing beyond the download.

Folder (hidden data) ships an update every 2 months, AstroPup View every 2 weeks. The most recent releases landed on September 10, 2026 and July 3, 2026 respectively.

## The numbers

| Metric | Folder (hidden data) | AstroPup View |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/astropup-view/id6752028730/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 9 MB | 21 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Ezequiel Barreto](https://appshunter.io/developer/1522603357) | [Aaron Freimark](https://appshunter.io/developer/1533614349) |

## What reviewers say

### Folder (hidden data)

[App page](https://appshunter.io/ios/app/folder-hidden-data/id1555143299)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### AstroPup View

[App page](https://appshunter.io/ios/app/astropup-view/id6752028730)

Easily manage and view astronomical image files like FITS and XISF. Offers GPU-accelerated rendering, automatic stretching, and QuickLook integration for a seamless user experience. Create icons and display smart metadata directly from your files.

**Highlights:** FITS and XISF format support, GPU-accelerated rendering, Automatic advanced stretching, QuickLook integration, Icon creation, Smart metadata display

**In-app purchases:** none


## Frequently asked questions

### Is Folder (hidden data) free?

Folder (hidden data) is free to download, with in-app purchases available.

### Is AstroPup View free?

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

### Do Folder (hidden data) or AstroPup View have ads?

Neither Folder (hidden data) nor AstroPup View shows ads.

### Which is updated more often, Folder (hidden data) or AstroPup View?

Folder (hidden data) ships an update every 2 months, and AstroPup View every 2 weeks. Most recently, Folder (hidden data) was updated on September 10, 2026 and AstroPup View on July 3, 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.*