# LECO Cornerstone vs Fast PDF Editor

The clearest difference is update cadence: Fast PDF Editor at every 2 days against LECO Cornerstone's every 5 weeks. Fast PDF Editor also leads on iOS requirement (15.5 vs 26.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

LECO Cornerstone ships an update every 5 weeks, Fast PDF Editor every 2 days. The most recent releases landed on October 19, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | LECO Cornerstone | Fast PDF Editor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/leco-cornerstone/id546739092/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Monetization | Free | — |
| Size | 46 MB | 76 MB |
| Requires iOS | 26.6 | **15.5** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LECO Corporation](https://appshunter.io/developer/546739095) | [雅丽 银](https://appshunter.io/developer/1838360177) |

## What reviewers say

### LECO Cornerstone

[App page](https://appshunter.io/ios/app/leco-cornerstone/id546739092)

Monitor your LECO instrument's status and results remotely from your device. View data, check maintenance, and receive vital updates on analysis completion and system information.

**Highlights:** Remote instrument status monitoring, View set and replicate results, Data visualization on plots, Check maintenance status, Access methods and details, Receive vital message updates

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

**In-app purchases:** none


### Fast PDF Editor

[App page](https://appshunter.io/ios/app/fast-pdf-editor/id6788446893)

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

**In-app purchases:** none


## Frequently asked questions

### Is LECO Cornerstone free?

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

### Is Fast PDF Editor free?

Fast PDF Editor is free to download, with no in-app purchases.

### Do LECO Cornerstone or Fast PDF Editor have ads?

Neither LECO Cornerstone nor Fast PDF Editor shows ads.

### Which is updated more often, LECO Cornerstone or Fast PDF Editor?

LECO Cornerstone ships an update every 5 weeks, and Fast PDF Editor every 2 days. Most recently, LECO Cornerstone was updated on October 19, 2026 and Fast PDF Editor on October 12, 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.*