Best S-Viewer Apps

247+ iOS apps curated and reviewed

3.3 avg rating

19 free apps

Updated August 2026

If you already know DWG FastView, this is the deeper bench. 247+ s-viewer apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of August 2026.

Compare top S-Viewer Apps (August 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	DWG FastView-CAD Viewer&Editor	Free	4.5★ (1.1K)	Yes	Yes	Sep 2026
2	S-Viewer	Free	3.0★ (2)	No	No	May 2026
3	Apollon Viewer	Free	—	No	No	Sep 2026
4	T5S Viewer	Free	—	No	No	May 2026
5	Winmail Viewer:for DAT,XPS,MSG	Free	2.0★ (1)	No	Yes	May 2026
6	SKM AR Viewer	Free	—	No	No	May 2026
7	Linux NVR Mobile Viewer	Free	—	No	No	Jul 2026
8	K-Viewer	Free	—	No	No	Jun 2026

Top Picks for S-Viewer

DWG FastView-CAD Viewer&Editor by Gstarsoft Co., Ltd

* Support 2D/3D CAD formats

Editor's Choice

📊 Productivity

4.5😐(1.1K ratings)

FreeAdsIn-App Purchases

DWG FastView-CAD Viewer&Editor screenshot 1

DWG FastView-CAD Viewer&Editor screenshot 2

DWG FastView-CAD Viewer&Editor screenshot 3

DWG FastView-CAD Viewer&Editor screenshot 4

DWG FastView-CAD Viewer&Editor screenshot 5

DWG FastView-CAD Viewer&Editor screenshot 6

This cross-platform CAD application allows users to view, edit, and create 2D and 3D designs on the go. It supports a wide range of file formats and offers advanced tools for precise drawing, measurement, and annotation, even offline.

What We Love

🚀 Fast and efficient
👍 Easy to use and intuitive
💡 Convenient mobile CAD viewing and editing
🚀 Quick file loading
👍 Smooth performance
👍 Accurate measurements and annotations
💡 Useful PDF export feature

Room to Improve

🐛 Crashes and freezes
💰 Subscription model with limited free features
🔒 Lack of customer support and communication
🔒 Unclear upgrade and purchase process
🔒 Aggressive advertising and paywalls
🔒 Unreliable file compatibility and opening

S-Viewer by TSUNG JUNG HU

Strong Contender

🔧 Utilities

3.0(2 ratings)

Free

This app allows you to view live images from a USB camera connected to a WiFi station wirelessly. You can capture, record, freeze, and annotate the video feed, and even switch to your iOS device's camera.

Apollon Viewer by Medutech s.r.o.

Worth Considering

🏥 Medical

0.0(0 ratings)

Free

More S-Viewer apps to explore

Winmail Viewer:for DAT,XPS,MSG

RAR, Winmail.dat Reader, TNEF

Free

This tool allows users to extract, view, and save the contents of winmaildat, msg, and xps files. It provides a complete solution for managing these file types, including viewing all attachments and rich text messages.

Extract winmaildat, msg, xps filesView file contentsSave extracted files

Visualize your 3D models in AR

Free

🔧 Utilities

(0)

Linux NVR Mobile Viewer

by EMSTONE Co., Ltd

Free

Monitor live camera feeds from your NVR/DVR devices. View multiple cameras simultaneously in various grid layouts and control PTZ functions. Receive event notifications for enhanced security.

NVR/DVR device managementLive camera monitoringMulti-camera grid layouts

Zip Rar 7z File Viewer

Free

$6.99 | 100% OFF

This app allows you to view and edit various file types, including code, databases, archives, images, and videos. It supports multiple programming languages and character encodings for code viewing and editing.

Code viewer with syntax highlightingCode editorArchive file extraction (ZIP, RAR, 7Z)

Monitor your security cameras remotely with this intuitive application. Access live feeds, review recordings, and save footage directly to your device for easy sharing. Customize settings and manage your devices with a simplified surveillance solution.

Live camera feeds (multiple display modes)Playback and recording accessSave and export video files

Simple. Reliable. Private.

Free

Connect with friends and family globally through private messaging and high-quality calls. Share moments, documents, and stay in touch across devices, even on slow connections. Your conversations are secured with end-to-end encryption.

End-to-end encrypted messagingHigh-quality voice and video callsGroup chats and calls

🌐 Social Networking

(19M)

free with in-app purchases

BePix - adfree multi viewer

No Ads. Image·Comic·Doc Viewer

by Cygnus Electronics SA

Camster! Network Camera Viewer

by Procypher Software Co.

Free

Access and view live network cameras globally for free. You can also add your own cameras for remote monitoring of homes, businesses, or public spaces. Stream video conveniently on your mobile device anytime, anywhere.

View public and private network camerasAdd and monitor your own camerasRemote access to live video streams

📷 Photo & Video

(11)

free with in-app purchases

File Viewer

by Sharpened Productions

Free

Easily open and view over 100 different file types, including documents, images, videos, and archives. Browse files stored on your device or in iCloud Drive. This app also identifies unknown files and displays detailed file information.

Open 100+ file typesBrowse device and iCloud DriveBuilt-in readers for Office, PDF, and images

A professional reader for image and e-book enthusiasts, this app offers a versatile reading experience across multiple devices. It supports over 20 file formats, advanced image processing, and flexible reading modes, with extensive cloud storage integration.

Supports over 20 file formats (images, archives, e-books, documents)Professional image processing and adjustment toolsFlexible reading modes (single/dual page, reading direction, scrolling)

📚 Books

(0)

paid

OneMarkup: File Viewer

File Viewer & HTML Apps

Free

📊 Productivity

(0)

IP Home Camera CCTV Viewer

Security Cam Video Protection

Free

Monitor your home and belongings with this app that connects to your IP cameras. View live HD video, record audio, and take screenshots. Organize your monitoring screen and manage recordings with flexible storage options.

Live HD video monitoringAudio recordingScreenshot capture

📊 Productivity

(5)

free with in-app purchases

FAQ about S-Viewer

What are the best s-viewer apps for iPhone?

DWG FastView-CAD Viewer&Editor tops our s-viewer apps ranking as of August 2026, with a 4.5-star average from 1.1K App Store ratings, and it's free to download.

Are there free s-viewer apps for iPhone?

Yes — 19 of the top s-viewer apps we rank are free to download, including DWG FastView-CAD Viewer&Editor and S-Viewer.

Does DWG FastView-CAD Viewer&Editor have ads or in-app purchases?

DWG FastView-CAD Viewer&Editor shows ads and offers in-app purchases, according to its App Store listing as of August 2026.

How many s-viewer apps are on the App Store?

We track 247+ s-viewer apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.

What can I do with DWG FastView?

DWG FastView allows you to view, edit, and create 2D and 3D CAD drawings. You can perform actions like moving, copying, rotating, scaling, measuring, and annotating objects. It also supports exporting drawings to various image formats and PDF.

What file formats does DWG FastView support?

The app is fully compatible with AutoCAD formats like DWG and DXF. It also supports browsing over 40 formats of 3D drawings, including BIM, Revit, Solidworks, NX, CATIA, Inventor, and more.

Best S-Viewer Apps

Compare top S-Viewer Apps (August 2026)

Top Picks for S-Viewer

What We LoveHighlights summarized from real App Store user reviews

Room to ImproveCommon complaints summarized from real App Store user reviews

More S-Viewer apps to explore

FAQ about S-Viewer

What We Love

Room to Improve