# TurboViewer > Mobile document viewer and annotator for 2D/3D CAD and PDFs. (iPhone/iPad app by IMSI/Design.) - Source: https://appshunter.io/ios/app/turboviewer/id440584381 (this page in markdown: same URL + `.md`) - Developer: [IMSI/Design](https://appshunter.io/developer/440584384) - Category: Productivity, Business - Price: Free with in-app purchases - Rating: 2.69/5 from 13 App Store ratings · 36 written reviews indexed - Age rating: 4+ - Requires: iOS 8.0 · 371 MB - Languages: Czech, Danish, Dutch, English, French, German, Italian, Japanese, Norwegian Bokmål, Polish and 5 more - Released: 2011-06-07 - Data updated: 2026-06-10 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/turboviewer/id440584381/reviews.md ## What is TurboViewer? Enjoy smooth multi-touch navigation as you pan, zoom, and 3D orbit around documents effortlessly in a wide variety of visual styles that enhances viewing. Includes innovations such as ‘always facing text’ (assures annotations are readable at any viewing angle) and arrow leaders that snap to orbiting 3D objects. Completely optimized for mobile, TurboViewer is the easy-to-use app for all of your daily review, markup, measurement, and translation needs. Unlock TurboViewer X, TurboViewer Pro and TurboReview through in app purchases. Features • Markups- Highlight important features. Draw, shapes, lines, clouds and text box. • 2D Viewing- View 2D CAD drawings and PDF’s. Pan and zoom. Saved views can be accessed as well. • Layers-Toggle layers on and off. A special markup layer is created to store any markups added to the drawing. • 3D viewing- View 3D CAD drawings and models. Pan, zoom orbit in a variety of visual styles including wireframe, hidden line, greyscale and shaded. Standard isometric views and perspective views are available. • Always Facing Text- Regardless of your view, text added from our markup tools will always be visible and readable. • Export- Share markups with other TurboApps users. Capture and share screenshots. • Native Viewing- View TCW, DWG, PDF, PNG and JPEG Support For support with any of our TurboApps products email turboapps@imsidesign.com. ## Key features - Smooth multi-touch navigation (pan, zoom, 3D orbit) - Annotation tools (highlight, draw, shapes, text) - Always facing text for readability - 2D and 3D CAD viewing - Layer management - Export markups and screenshots - Native viewing of TCW, DWG, PDF, PNG, JPEG ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | TurboViewer X Upgrade | $9.99 | one-time | | TurboViewer Pro Upgrade | $29.99 | one-time | | TurboReview Upgrade | $49.99 | one-time | ## Recent user reviews (10 of 36) All indexed reviews: https://appshunter.io/ios/app/turboviewer/id440584381/reviews.md ### 3/5 — Pdf mark ups *2019-11-01, version 6.1.7* Can you make mark ups on PDFs notes highlight circles arrows and send those notes to others? ### 1/5 — Almost completely useless *2019-08-12, version 6.1.7* Only views tcws as-is. Can’t even select objects to get dimensions. ### 1/5 — Junk *2016-04-23, version 4.2.3* I could not do anything with this software. I think that you need to purchase the full version which is kind of expensive. Oh well, nothing's free but I am going to keep looking for an app that can view and edit DWG prints. ### 3/5 — Seven dollars to remove ads? Really? *2015-06-04, version 4.2.0* That's more than most apps cost. ### 5/5 — Great for papercrafters *2015-05-19, version 4.1.2* Best .pdo viewer app. ### 1/5 — This doesn't really do anything *2014-10-01, version 4.0* As far as I can tell this app doesn't read/view any files I might want it to. It just tells me to buy another version that works ### 5/5 — Thank You, IMSI *2014-09-10, version 3.5* I've been using TurboCAD for years and I was tired of printing CAD drawings and taking them to the shop to work on. Now I can take my iPad into the shop instead. Being able to zoom, spin, etc is all I needed and this is GREAT! So great I've plunked down the $6.99 for the X version --- not that I minded the banners but I really wanted to reward IMSI for a great app. ### 5/5 — Better thank Autodesk *2014-09-10, version 3.5* I use Buzzsaw for work on the daily. The Buzzsaw app does not always open dwiffs until you flush your cache. Turboviewer opens every time. Thanks ### 4/5 — you can view and draw notes only *2014-08-08, version 3.5* no way to draw measurements that are not already on the drawing. ### 4/5 — Was good till.... *2014-04-25, version 3.1* ...till you made viewing .stl files something I now have to pay $24 to use. F that! ## Frequently asked questions about TurboViewer ### What does TurboViewer do? TurboViewer is a mobile application designed for viewing and annotating a wide variety of documents, including 2D and 3D CAD files and PDFs. It provides smooth navigation for panning, zooming, and 3D orbiting, along with tools for markups like highlighting, drawing shapes, and adding text. ### What are the key features of TurboViewer? Key features include smooth multi-touch navigation for 2D and 3D viewing, 'always facing text' for readable annotations, markups tools (highlight, draw, shapes, text boxes), layer management, and native viewing support for formats like TCW, DWG, PDF, PNG, and JPEG. Users can also export markups and screenshots. ### How is TurboViewer monetized? TurboViewer is available for free with the option to unlock additional features and capabilities through in-app purchases. Specifically, TurboViewer X, TurboViewer Pro, and TurboReview can be accessed via these purchases. ### What file formats can TurboViewer open? TurboViewer supports native viewing of several common file formats. These include TCW, DWG (for CAD files), PDF, PNG, and JPEG. This broad compatibility allows users to work with a wide range of project documents. ### Who is the target audience for TurboViewer? This app is ideal for professionals and individuals who regularly need to review, mark up, measure, and translate documents, particularly those working with 2D and 3D CAD drawings and PDF files. It caters to daily review needs in fields like engineering and architecture. ## Version history (last 5 releases) ### 6.1.7 — 2018-01-15 This app has been updated by Apple to display the Apple Watch app icon. iOS v11.x compatibility Various bug fixes Improved performance ### 5.1.0 — 2017-05-26 iOS v10.x compatibility Various bug fixes Improved performance ### 5.0.1 — 2016-07-28 Crash on opening U3D content​ from Pdf files is fixed. Various bugs are fixed. Stability improved ### 5.0 — 2016-07-04 Native support for TCW files Now in TurboViewer 5.0 users can open files from TurboCAD​ windows without any additional file conversion. All 2D geometry, TC Surface, Smesh and ADT entities are supported. 3D Solids require proxy objects to be saved with your TCW drawing. Flat UI Theme All icons have been redesigned using a minimalist approach. This will result in brighter icons that will be much easier to see when the app is used outside. Toolbars have been simplified and are mostly transparent further increasing the visibility of the tool icons. Menus have been redesigned with a simple theme to better match the new icons and toolbars. ### 4.2.3 — 2016-03-30 Fixed problem with Chinese characters. ## Apps similar to TurboViewer | App | Rating | Price | Category | | --- | --- | --- | --- | | [HomeCAD — Design your home](https://appshunter.io/ios/app/homecad-design-your-home/id1104645340) | 3.0 (24) | Free | Productivity | | [CADraw](https://appshunter.io/ios/app/cadraw/id1526269907) | 2.7 (9) | Free | Productivity | | [3D Model Viewer - AR View](https://appshunter.io/ios/app/3d-model-viewer-ar-view/id1105242878) | 4.2 (323) | Free | Productivity | | [iPocket Draw Lite](https://appshunter.io/ios/app/ipocket-draw-lite/id315887414) | 3.6 (16) | Free | Productivity | | [SightSpace Pro AR for SketchUp](https://appshunter.io/ios/app/sightspace-pro-ar-for-sketchup/id972397963) | — | Free | Productivity | | [Viewer 360](https://appshunter.io/ios/app/viewer-360/id1332241273) | 3.0 (2) | Free | Productivity | ## More apps by IMSI/Design - [TurboViewer X](https://appshunter.io/ios/app/turboviewer-x/id463052720) - [TurboSite Standard](https://appshunter.io/ios/app/turbosite-standard/id569258399) - [TurboSite Pro](https://appshunter.io/ios/app/turbosite-pro/id651219013) - [DroneScout](https://appshunter.io/ios/app/dronescout/id1052400699) All apps by IMSI/Design: https://appshunter.io/developer/440584384 --- *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.*