Comparison

Prusa vs STL Preview

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Prusa

Monitor and manage your 3D printers remotely. Control print parameters, receive notifications for print status, and integrate with model repositories and slicing software. Easily add new printers and cameras, with options for cloud or on-premises storage.

Highlights
  • Real-time printer overview
  • Remote print management
  • Temperature, speed, flow control
  • Push notifications
  • Printables.com integration
  • EasyPrint slicing integration
  • NFC printer setup
Features
Read full description

Key Features - Real-time overview of all your Prusa 3D printers in Prusa Connect - Remote printer management. Start, pause, or stop prints directly from the App - Temperature, speed, flow, and position control - Push notifications when prints finish, schedules color changes, and everything else - Integration with Printables.com - browse and start printing - EasyPrint integration - Slice wherever you are, directly from the Prusa App - Add new 3D printers to Prusa Connect using the App - Add and control Buddy3D cameras with all available features - Cloud and on-premises printer storage - NFC printer setup - Team management - Belt tuner - Easily accessible print queue - Focus on privacy and security We plan to keep adding useful new features over time. We would love to hear your feedback!

About

STL Preview

Features
Read full description

STL Preview helps you open and inspect STL files directly on your iPhone or iPad, without needing to return to your computer just to check a 3D model. Whether you are preparing a 3D print, reviewing a design, sharing a model with someone, or quickly checking a part on the go, STL Preview gives you a simple way to see your model clearly in 3D. Open an STL file from Files, downloads, or the share sheet, then rotate, zoom, and examine it with smooth touch controls. Instead of guessing what a file contains from its name or waiting until you are back at your desktop CAD software, you can preview the model immediately. With AR mode, you can place your STL model into the real world using your device camera. This makes it easier to understand size, shape, and proportion before printing, presenting, or continuing your design work. You can also customize the model color and background color to make details easier to see. STL Preview is made for engineers, designers, makers, students, 3D printing users, and anyone who works with STL files and wants a faster, simpler way to inspect them on mobile. Open the file. View the model. Check it before you print, share, or continue.

Screenshots

Prusa4 screens
STL Preview4 screens

Verdict

The call

The clearest difference is in-app purchases: Prusa at none against STL Preview's 1. Prusa also leads on ads (none vs shown). STL Preview's advantage is update cadence (every 3 days vs every 5 weeks). On price, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. STL Preview sells 1 one-off in-app purchase. Prusa asks for nothing beyond the download.

UpkeepUpdate frequency

Prusa ships an update every 5 weeks, STL Preview every 3 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Prusa versus STL Preview: the parameters behind the verdict, then further details
ParameterPrusaSTL Preview
PriceFreeFree
Rating4.0 (117 ratings) — better—
Positive reviews50.5% of reviews—
Number of ratings117 — better—
Update frequencyEvery 5 weeksEvery 3 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size102 MB34 MB
Age rating17+4+
DeveloperPrusa Research a.s.Enes Akkus

In-app purchases

None

Prusa

No in-app purchases

1 purchases

STL Preview

One-time1
  • Remove Ads$0.49

Questions

Is Prusa free?
Prusa is free to download, with no in-app purchases.
Is STL Preview free?
STL Preview is free to download, with in-app purchases available.
Do Prusa or STL Preview have ads?
STL Preview shows ads; Prusa does not.
Which is updated more often, Prusa or STL Preview?
Prusa ships an update every 5 weeks, and STL Preview every 3 days. Most recently, Prusa was updated on October 25, 2026 and STL Preview on October 24, 2026.

Other comparisons