# PDF Studio(Pro) vs GoFly

The clearest difference is price: GoFly at Free against PDF Studio(Pro)'s $2.99. PDF Studio(Pro)'s advantage is in-app purchases (none vs 3) and update cadence (every 2 days vs weekly). On ads and device support there is nothing between them.

GoFly is free to download; PDF Studio(Pro) costs $2.99 up front. GoFly sells 3 in-app purchases, starting at $4.99 per month. PDF Studio(Pro) asks for nothing beyond the download.

PDF Studio(Pro) ships an update every 2 days, GoFly weekly. The most recent releases landed on October 25, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | PDF Studio(Pro) | GoFly |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[4.5 (16 ratings)](https://appshunter.io/ios/app/gofly-e6b-aviation-calculator/id6788937279/reviews)** |
| Number of ratings | — | **16** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 42 MB | 22 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hrishi Suthar](https://appshunter.io/developer/1660005858) | [Trevor Welsh](https://appshunter.io/developer/1629778950) |

## What reviewers say

### PDF Studio(Pro)

[App page](https://appshunter.io/ios/app/pdf-studiopro/id6757748809)

**Features:** macOS Compatibility

**In-app purchases:** none


### GoFly

[App page](https://appshunter.io/ios/app/gofly-e6b-aviation-calculator/id6788937279)

This aviation calculator provides pilots with fast, accurate flight planning tools. It features a live wind triangle, detailed calculation breakdowns, and core E6B functions. The app also includes a METAR decoder and weight & balance calculations, with offline functionality for most features.

**Highlights:** Live wind triangle with redraws, Detailed calculation breakdowns ('Show the Work'), Core E6B tools (TAS, density altitude, time/speed/distance, fuel, crosswind), METAR decoder for live weather reports, Weight & balance calculations with saved aircraft presets, Offline functionality for calculations

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GoFly Monthly | $4.99 | per month |
| GoFly Yearly | $29.99 | per year |
| GoFly Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is PDF Studio(Pro) free?

PDF Studio(Pro) costs $2.99, with no in-app purchases.

### Is GoFly free?

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

### Do PDF Studio(Pro) or GoFly have ads?

Neither PDF Studio(Pro) nor GoFly shows ads.

### Which is updated more often, PDF Studio(Pro) or GoFly?

PDF Studio(Pro) ships an update every 2 days, and GoFly weekly. Most recently, PDF Studio(Pro) was updated on October 25, 2026 and GoFly on November 4, 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.*