LECO Cornerstone vs Fast PDF Editor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LECO Cornerstone
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.
- Remote instrument status monitoring
- View set and replicate results
- Data visualization on plots
- Check maintenance status
- Access methods and details
- Receive vital message updates
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With Cornerstone installed on your device, you can monitor the status of your LECO instrument from anywhere in the world! Features: • View all your set and replicate results • See data on curve/scatter plots • Check maintenance status • View methods and method details • Check status and monitor activity • View the latest system & leak check results • View ambient values • View message history • View digital inputs & outputs • View valve states • View system parameters • Get message updates upon completion of an analysis or for other vital information
Fast PDF Editor
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Fast PDF is an all-in-one PDF toolkit for everyday document work. Open and organize PDFs, merge and split files, convert documents, extract text with OCR, annotate pages, add signatures, protect files, unlock documents, and scan paper into clean digital copies. Designed for study, work, and daily tasks, PDF Velvet keeps essential PDF tools in one simple mobile workspace.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | LECO Cornerstone | Fast PDF Editor |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 5 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 26.6 | 15.5 — better |
| Further details — not scored | ||
| Size | 46 MB | 76 MB |
| Age rating | 4+ | 4+ |
| Developer | LECO Corporation | 雅丽 银 |
In-app purchases
LECO Cornerstone
No in-app purchases
Fast PDF Editor
No in-app purchases
Questions
Is LECO Cornerstone free?
Is Fast PDF Editor free?
Do LECO Cornerstone or Fast PDF Editor have ads?
Which is updated more often, LECO Cornerstone or Fast PDF Editor?
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