Reviews of Fast STL Viewer

By: Fast STL Viewer

List of user reviews and ratings for Fast STL Viewer

Total ratings

3.02 (Rating count: 4,311)

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Review summary

Users praise Fast STL Viewer for speed and simplicity on mobile, especially for large STL files. However, multiple reviews report crashes, failures to open files, and compatibility issues. Monetization concerns (ads and subscriptions) and occasional data-loss concerns also recur. Overall sentiment is mixed: strong positives on fast, easy viewing, with reliability and pricing friction as the main drawbacks.

Pros

Very fast at opening large STL files and quick to view
Easy to use and works as a straightforward STL viewer
Good for mobile viewing and visualizing designs away from desktop
Does exactly what it says and provides basic, reliable functionality
Handy tool for quick STL viewing on the go

Cons

Frequent crashes and failure to open STL files on various devices
Ads and subscription model cause friction; ad removal options often unreliable
Some STL files are not recognized or supported (compatibility issues)
Potential data loss: opened files may be deleted from the device
UI/UX annoyances and occasional performance issues (timeouts, banners)

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User Reviews

Recent rating average: 2.20

All time rating average: 3.02

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20% (62)

Date	Author	Comment
2026-06-02	Da*****	Can't look at a model for more than 2 seconds. Rubbish - uninstalled
Can't look at a model for more than 2 seconds. Rubbish - uninstalled
2026-05-28	Re*****	Too many ads. I'll open 3 or so stls and I get an ad after 4 seconds for each. It's annoying, bring back the banner on the top or something.
Too many ads. I'll open 3 or so stls and I get an ad after 4 seconds for each. It's annoying, bring back the banner on the top or something.
2026-05-22	Pa*****	fake app ads only
fake app ads only