# JustPDF vs Orbit

The clearest difference is update cadence: Orbit at every 3 days against JustPDF's weekly. JustPDF's advantage is iOS requirement (18.6 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. JustPDF sells 1 one-off in-app purchase and Orbit sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

JustPDF ships an update weekly, Orbit every 3 days. The most recent releases landed on September 13, 2026 and July 6, 2026 respectively.

## The numbers

| Metric | JustPDF | Orbit |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 19 MB |
| Requires iOS | **18.6** | 26.0 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Johanna Hoppe](https://appshunter.io/developer/1869099620) | [Joshua Caleb Green](https://appshunter.io/developer/1887583729) |

## What reviewers say

### JustPDF

[App page](https://appshunter.io/ios/app/justpdf-offline-pdf-reader/id6761554226)

A minimalist PDF reader for local document storage and offline viewing. Import PDFs from various sources into a private library designed for focus. Enjoy a clean, ad-free experience with a one-time purchase for unlimited access.

**Highlights:** Offline PDF reading, Private on-device storage, Clean PDF viewer, No ads, No account or cloud dependency, Fast access to library, One-time purchase

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| JustPDF Lifetime Unlock | $4.99 | one-time |


### Orbit

[App page](https://appshunter.io/ios/app/orbit-ai-second-brain/id6769115384)

**Features:** macOS Compatibility, Safari Extension, Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Orbit Pro | $2.99 | per month |
| Orbit Pro | $29.99 | per year |
| Orbit Pro Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is JustPDF free?

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

### Is Orbit free?

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

### Do JustPDF or Orbit have ads?

Neither JustPDF nor Orbit shows ads.

### Which is updated more often, JustPDF or Orbit?

JustPDF ships an update weekly, and Orbit every 3 days. Most recently, JustPDF was updated on September 13, 2026 and Orbit on July 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*