A powerful image viewer built from the ground up with highly optimized code especially adept at viewing large bitonal images (e.g. engineering drawings, well logs, etc). Unlike competing products, FIV does not require importing images to local storage and does not need to create any temporary data on your device. It can access images in your camera roll and all supported cloud storage services and open them directly with no delays. Priced fairly, fully functional and no in-app purchases.

*** Now with 3D-Touch support - Quick Actions, Peek/Pop and accelerated pressure-sensitive image panning

FIV can view the following image formats:
TIFF (TIF) - single or multiple pages, (Uncompressed, Packbits, LZW, JPEG, Huffman, G31D, G32D, G4, Flate/ZIP, Planar, CMYK, RGB, YCbCr)
BMP (Windows, OS/2, RLE)
DICOM (uncompressed, RLE, JPEG, animated)
CALS (type 1)
JEDMICS C4 (US Military images)
GIF (+Animated)
FLI/FLC (Animated)
PNG (+Animated)
JPEG (baseline, progressive, extended, lossless, YCbCr, RGB, CMYK, YCCK)
JPEG2000 (jp2/j2k/dicom/pdf)
PCX,DCX (multipage PCX)
Targa (uncompressed, RLE)
QuickLinks FAX
Microsoft FAX (*.AWD)
FITS (astronomy images)
PDF - NOTE: PDF support is limited to scanned images such as FAXes, NOT text or vector graphics. This is useful if you know your PDF file contains scanned images because FIV can view and navigate it much quicker than other PDF viewers.

FIV is great at viewing large black & white scanned images. Unique technology allows for incredibly fast decoding and readable scale-to-gray (anti-aliased) views. Navigate between pages/files in milliseconds even on less powerful phones.
FIV is capable of viewing well logs faster than any other software available. As an oil/gas/water well log viewer, FIV can open scans up to 600 x 600 inches (@400dpi).

If a supported image doesn't load correctly or a feature doesn't work as expected, please contact us for tech support (

Please check our Twitter feed for the latest news:

FIV has no external dependencies. The imaging code is completely self contained and written in portable C and optimized assembly language. Please send any licensing requests to

What’s New

Version 2.0.2

Updated for iOS 10
Fixed camera roll permission
Fixed saving as PDF crash
Fixed "open/import" sharing from other apps (registered document types)

Ratings and Reviews

2.0 out of 5
1 Rating

1 Rating

brian.mcgroarty ,

Not a great choice for cloud albums

When viewing images on Dropbox, you can’t quickly flip through images. You have to tap each to download it to your device, and tap again to view. I had expected to be able to quickly swipe through and have it pre-fetch and cache successive photos like with other viewers.

schrackface ,

Crashes, won't display

Just purchased the app for iPad. I had 3 DICOM files on my google drive. It failed to display all of them. It also continually crashes. I want my $ back please.

Developer Response ,

I would be happy to resolve the issue if you give me a chance. You didn't try to contact me and just left a 1 star review, so there's not much I can do to help you.

JFR-19 ,

Great Viewer

Simple, clean, straightforward, no bugs, no crashes. Supports just about any image type. Shows image info you'd want to know. Really nice knowing the image type and dimensions; can't get that from iOS Photos preview. Great tech support with the developer.


TDF Software
2.2 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Turkish

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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