# STL Simple Viewer — user reviews > 156 indexed App Store user reviews of STL Simple Viewer by Victor Bovio, rated 4.30/5 from 866 ratings. - Source: https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews - App overview in markdown: https://appshunter.io/ios/app/stl-simple-viewer/id1493598400.md - Rating breakdown: 5★ 642 · 4★ 54 · 3★ 39 · 2★ 28 · 1★ 103 ## What do users think of STL Simple Viewer? Overall sentiment: negative **Pros** - 🚀 Simple and intuitive viewer - 👍 Useful viewing options - 💡 Supports multiple file formats **Cons** - 🐛 Frequent crashes - 🔋 High battery consumption - 🚨 Excessive and intrusive ads - 🔍 Limited functionality for larger files **Commonly reported bugs** - App crashes when opening larger STL files - Inability to open some file formats - Ads continue to appear even after paying for ad removal **Most requested features** - Add ability to save color/lighting settings - Improve stability and reduce crashes - Provide an ad-free paid version ## Newest reviews (20 of 156) ### 2/5 — Glitchy *2026-07-14, version 2.0* Constantly glitching and crashing. Even while attempting to write this review ### 3/5 — Mid *2026-06-05, version 1.2* If you want to view an stl file. You can. If you want to search through a couple you’re gonna get ads. Not a good app. Not a bad one. ### 2/5 — Too many ads *2026-05-01, version 1.2* Ads crash app ### 2/5 — Unfortunately it won’t load *2026-03-18, version 1.2* It crashes when I try to load anything and doesn’t work ### 3/5 — Victor Bovio makes another app called Meshman 3D Viewer for STL DXF OBJ DAE 3DS FBX *2026-02-16, version 1.2* Victor Bovio has written an in my opinion a way better app for viewing STL files and yes you do not get the app closer issue every 5 files you view like you get in STL simple viewer app. It is well worth the 6.99 for Meshman 3D Viewer for STL DXF OBJ DAE 3DS FBX plus you get all of these other file formats you can view and even export to from another. I’m guessing the answer is in the name of this app it’s supposed to be a Simple STL viewer and that is what it does. His Meshman 3D Viewer for STL DXF OBJ DAE 3DS FBX is again way better and you get way more features included in the one price. Thank you Victor for a great app! ### 1/5 — Too Many Ads and Crashes *2025-11-25, version 1.2* I get that you want to make a buck, but can’t you make ads less frequent? I’m also not going to purchase an ad free version of an app that crashes. ### 1/5 — Реклама *2025-10-19* Просмотру мешает реклама ### 1/5 — Works great but x-rated ads *2025-10-01, version 1.2* Downloaded it to view STL files I made to show my son, then noticed some highly inappropriate ads, immediately deleted. Disappointing, as it does what I want otherwise. ### 1/5 — Реклама мешает *2025-09-27* Невозможно пользоваться , одна реклама ### 1/5 — Frequent crashes *2025-09-21, version 1.2* App crashes when trying to open STL larger than 90MB ### 3/5 — Too many ads *2025-09-09, version 1.2* It does work, it’s just annoying having an ad every single time I want to open something. ### 1/5 — Pub ! *2025-09-03, version 1.2* Une publicité toute les 10 secondes ! Sérieusement ?! ### 1/5 — Too much ad, should make a paid option to remove ad *2025-08-12, version 1.2* To much ad ### 1/5 — Çalışmıyor *2025-08-08, version 1.2* Çizimi açtığımda kapanıyor ### 3/5 — Permanent Werbung, Stürzt immer ab *2025-07-25* Es ist so nervig sich irgendwas anzuschauen, es wird immer Werbung eingeblendet und dann auch immer die die ewig lang dauert. Dann stürzt die App ab und man darf sich die Werbung nochmal anschauen, echt geil. ### 2/5 — too many ads *2025-06-25, version 1.2* too many ads now, 2+ years ago, it was usable. can’t even use the app now ### 1/5 — Приложение требует интернет *2025-06-24* Если ограничить доступ в интернет (сотовые данные), то отказывается запускаться. А интернет нужен всего лишь для показа рекламы. ### 1/5 — Ads are over the top. *2025-06-06, version 1.2* It used to work fine and I don't mind ads for free apps. However lately when I try and use the App I am shown full page ads with no way to close/exit the ad even after the long video has played. ### 4/5 — Stl *2025-06-05, version 1.2* Me encanta la aplicación Stl!!! ### 1/5 — Crashes Too Much *2025-05-27, version 1.2* This app has been basically useless as it keeps crashing trying to load files that load anywhere else just fine. The ads work though. ## Most critical reviews (10 lowest-rated) ### 1/5 — App is horrible *2026-08-29, version 2.1* Can’t evaluate the app without being bombarded by aggressive ads. ### 1/5 — Works for 30 secs *2026-07-09, version 2.0* App constantly quits as soon as it loads an stl. 2.0 is still riddled with ads, listen I’m not against ads but every damn minute is annoying. ### 1/5 — Pornographic ads *2026-03-15, version 1.2* Are you kidding me dude ### 1/5 — Так се *2026-03-10* Не открывает файлы большего размера, слетает ### 1/5 — Has porn ads. Avoid. *2026-03-02, version 1.2* It has ads which are fine but it was basically porn. Not cool. ### 1/5 — Слишком много рекламы *2026-02-21* Невозможно смотреть файлы больше 5 секунд - все время вылезает навязчивая реклама. При этом видео рекламы может не загрузиться, в таком случае придется перезагружать приложение и смотреть рекламу заново. Я по началу думала, что «ладно, все хотят зарабатывать, мне не сложно посмотреть рекламу», но то количество, которое ждёт вас внутри, выведет любого из равновесия. ### 1/5 — Useless *2026-01-06, version 1.2* POS ### 1/5 — Add trash *2025-12-27* Cant work with it. Its ad -gressive ### 1/5 — Spam filled *2025-12-26, version 1.2* Has ads to sell you porn and tells you your phone has viruses. Scam app don’t use. ### 1/5 — way to many ads *2025-12-13, version 1.2* way to many i will be trying to flip through files i downloaded to view them and ever time i have a ad i move the screen a little bit i have a ad it’s a bit much. i understand you have to make money but you already offer a better version maybe find another feature to offer instead of all the ads. ## Most praised reviews (10 highest-rated) ### 5/5 — Great *2025-02-27, version 1.2* The app does exactly what’s says it will! Opens stl files allows manipulation 360 degree viewing along with capabilities to zoom in and out with precise clarity! Great and functional just the way I had hoped! ### 5/5 — Awesome STL Viewing App!!!! *2025-02-03, version 1.2* Working great with every single STL file I’ve thrown at it lately and it’s just worked!!! Lets me preview some files on my iPhone before I try to print them!!! ### 5/5 — my review *2024-10-30, version 1.2* i love it it is so easy to use and understand ### 5/5 — güzel *2024-06-03, version 1.2* güzelll ### 5/5 — Crashes a lot *2024-02-27, version 1.2* On an iPhone X it crashes a lot, and some .slt files can be opened without crashing only by re-installing the app ### 5/5 — Adds irritating *2023-12-05, version 1.2* Beautiful app ,commercials killing it , I don’t mind paying for it ,but it is not sold ### 5/5 — Nice light STL viewer *2023-06-11, version 1.1* Simple and easy to use STL viewer. Does what it says it will. Paid for the add free version. Good app! A couple other features that would be really great would be a simple way to change/move/edit both the light source and materials. Thanks! ### 5/5 — great app!! *2023-05-05, version 1.1* I use this app everyday to inspect files for flaws and it works great and has improved a lot since a few months ago, which would always crash when opening a file. Great job!! ### 5/5 — Developer is responsive *2023-03-20, version 1.1* I complained and downgraded my rating to 2 stars after I started seeing ads (even though i paid to not see them), and somehow without a response felt the developer the problem was resolved. I take it as they read my complaint and acted to fix it. For that I say thank you and I have upgraded my rating to the 5 stars rating you deserve. Super super solid app. Highly recommended to open stls ### 5/5 — Simple and perfect *2023-02-07, version 1.1* This stl viewer is simple and to the point. I use this app almost daily to review and look at files on the go and before I print them. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*