# 3D PDF Reader — user reviews > 150 indexed App Store user reviews of 3D PDF Reader by Tech Soft 3D, rated 3.70/5 from 16 ratings. - Source: https://appshunter.io/ios/app/3d-pdf-reader/id569307672/reviews - App overview in markdown: https://appshunter.io/ios/app/3d-pdf-reader/id569307672.md - Rating breakdown: 5★ 8 · 4★ 2 · 3★ 1 · 2★ 3 · 1★ 2 ## Newest reviews (14 of 150) ### 2/5 — Used to work well *2025-05-04, version 3.8.1* ...but doesn't anymore. It doesn't open files now and it doesn't integrate with the Files app. It doesn't even fill the screen of some iPads. Needs an update. ### 4/5 — 復活？ *2024-05-08, version 3.8.1* 数年前に見つけてからずっと使っていました。 しかし、一年前ぐらいからiOS端末への配信が止まっていたようで、 新しい端末に入れられなくてもどかしく思ってました。 しかし、久々に調べたら再度配信が始まってました！ 他のアプリと違って、正常に開きますし、ややこしい操作もなくてとても便利です。 ただ、なぜ配信が止まってたのか、再度配信されたのは何故なのかは知りたいかもです。 でも、3DPDFをタブレットで開くのには1番便利かも ### 4/5 — Va bien *2022-10-23, version 3.8.1* Va bien. No tenemos problema. Lo único es que podría añadir funciones como ocultar piezas. Vendría bien. ### 4/5 — Good for all 3d not only pdf *2022-05-03, version 3.8.1* I like it , it works very well With a different name probably it will have thousands of downloads ### 4/5 — Perché non aggiornate *2022-03-13, version 3.8.1* App fantastica ma per quale motivo non la aggiornate . Anche con versione a pagamento Salutu ### 2/5 — Good potential but… *2021-10-26* Completely outdated and key functionality missing: model tree, measurements, link to Files or other storage app… ### 4/5 — Perfekt für Baustellen *2021-04-16, version 3.8.1* Die App ist perfekt geeignet um vor Ort schnell die 3D pdfs zu laden.. jetzt brauch man nur noch details Anzeige für die einzelnen Komponenten und ein Messungs Tool dann 5 sterne !! ### 3/5 — Where can I find my file in iphone *2020-12-17, version 3.8.1* I viewed files with 3d PDF reader . However I cannot find my file which saved in my iPhone and showed up in the 3d PDF reader list. Does it automatically save the file I opened with 3d PDF reader to your cloud server? ### 3/5 — Stopped working early 2020 *2020-04-14* I have been using this and recommending it to customers to review custom engagement ring designs that we submit to them for five years but it recently stopped working with 3D PDF files. I notice that it hasn’t been updated in about 2 years. Please developers update this app, it is very useful. Adobe needs to be updated every year or so to open the 3D files, please update this app ### 5/5 — Insanely good *2019-12-05, version 3.8.1* Very practical and it’s free!!!! ### 5/5 — Great! *2019-10-25, version 3.8.1* Works on iPad Air. A brilliant thing. ### 5/5 — Unterschätzter CAD Helfer *2019-10-02, version 3.8.1* Top Produkt, nutze es seit 2017 mit Integration der Exportmöglichkeit von Autodesk Inventor. 3D PDF auf Handy und Tablett sollte ein Muss auf jeder Montage und in jeder Fertigung werden. Nutzen ist riesig und Aufwand so gut wie nicht vorhanden! ### 5/5 — Funciona Ok *2019-09-11, version 3.8.1* Suficiente para ver modelos 3D ### 5/5 — 很方便 *2019-08-08, version 3.8.1* 新開發模具，經常要跟開發確認外觀，以前都要在電腦看，現在直接手機可以看，真TM的方便多了 ## Most critical reviews (10 lowest-rated) ### 1/5 — Uups - opened files are deleted from original folder…. *2025-02-24, version 3.8.1* Hi there. The software displays all sources as described, yet as soon as a file is opened, it is DELETED from its original folder - and cannot be found by search again. It is the shown in the „recent“ list of PDF Reader, can also still be opened and used, but there is no possibility so save it from there back to the original folder. That is quite a problem if you open something which is not yet backed up. Where on the MacOS are the „recent“ files stored? Can you provide an update which stops „deleting“ files when opening them? MacOS Sequoia 15.2… ### 1/5 — Eskiden Apple da dosyalara erişim yapabiliyorduk şuan kısıtlanmış *2025-01-16, version 3.8.1* İphone önerilerinde çıkmıyor uygulama ve dosyalarımı açamıyorum kötü bir güncelleme olmuş…!!! ### 1/5 — Upgrade??? *2022-02-22, version 3.8.1* No upgrades for years, is this app dead? ### 1/5 — 使えなくなりました *2020-11-09, version 3.8.1* Ios14.2 から立ち上がりません。 ### 1/5 — Ne fonctionne plus ! *2020-11-08, version 3.8.1* Ne fonctionne plus sous IOS 14.2 ### 1/5 — App nicht mehr brauchbar *2019-11-01, version 3.8.1* Seit kurzer Zeit kann ich meine 3D-Daten nicht mehr öffnen. Kommt hier auch mal ein Update? ### 1/5 — Crashes *2018-10-04* Loads then crashes ### 1/5 — Crashes *2018-01-05* Like previous reviewer, latest version crashes when trying to select local or Dropbox. IPhoneX: IOS 11.2.1. Turns a useful program useless ### 1/5 — Crashes *2018-01-03, version 3.8* When trying to open Dropbox or local files application crashes. ### 1/5 — Crash upon Launch *2016-02-07, version 3.1* App crashes upon launch on iPhone 5 running iOS 7.1.1. Email bug report undeliverable through developer website. Works fine on iPad Air running iOS 9.2.1. ## Most praised reviews (10 highest-rated) ### 5/5 — Perfetta *2025-12-06, version 3.8.1* Applicazione super utile. Riesce ad aprire file anche molto pesanti e farli girare in maniera super fluida. ### 5/5 — Best STEP viewer *2025-06-05, version 3.8.1* Open heavy STP files without problems, can do section views. It is amazing ### 5/5 — One of best simple app *2025-03-13, version 3.8.1* It’s really best app which is useful for 3D pdf viewer ,simple , and includes all feature , more convenient then pc in many case Hope you can release 3d assembly viewer in all possible extensions like .stp , .igs , .stl etc ### 5/5 — Perfect!! *2024-06-15, version 3.8.1* After more than year again updated. Capable to open 3D pdf Step files X.T files. Awesome app and only one in app store. ### 5/5 — 讚 *2022-09-06, version 3.8.1* 能中文更棒 ### 5/5 — Por favor atualize - please update this *2022-01-18, version 3.8.1* Aos criadores o APP é ótimo mas fazem 4 anos que não há atualizações To the creators, the APP is great but it's been 4 years since there's been any updates ### 5/5 — how do you share? *2021-11-28, version 3.8.1* How can I share the step file I opened in the application? ### 5/5 — Très bon viewer. *2020-12-09, version 3.8.1* Très fluide, très intuitif et complet. Top ! ### 5/5 — Der Wahnsinn... *2020-11-23, version 3.8.1* Wer eine Lösung sucht um große .stp Dateien ( größer 190 MB )auf einem IPhone (11 Pro) zu öffnen hat hiermit selbige gefunden. Zoomen, Drehen, Schneiden - auch über alle drei Ebenen gleichzeitig - läuft Butterweich. Ladezeit bei ca. einer Minute. Ein wirklich sehr, sehr gelungenes Stück Software. Mein Surface mit einem i7, 16 GB und eDrawing bricht sich einen Zacken aus der Krone bis das Modell geladen ist. Vielen Dank an die Entwickler! Vorschlag für zwei Ergänzungen: 1- Kommentare an Bauteilen anbringen 2-VR mit Anbinden vom Modell an einem oder zwei Fixpunkten um Umbauten im Anlagenbau mit dem Kunden im Bestand am IPhone oder IPad bestaunen zu können. Das wäre mir persönlich ein paar -viele- Euros wert. ### 5/5 — Superlativa *2020-08-15, version 3.8.1* Non solo visualizza i file convertiti in PDF 3D ma addirittura le versioni .step anche molto “pesanti” che non riesco a visualizzare con un PC. Ed è completamente GRATUITA e senza neanche pubblicità.. un enorme ringraziamento agli sviluppatori! --- *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 2026-06-10.*