When comparing XnView vs Phiewer, the Slant community recommends XnView for most people. In the question“What are the best image viewers for OS X?” XnView is ranked 4th while Phiewer is ranked 5th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Supports over 500 image formats
Pro Includes simple editing tools
Typical image editing tools are included. For instance, there are tools for color and size manipulation, several filters and effects.
Pro Available for macOS, Linux and Windows
Pro Easy redate and view configuration
Pro Compare images side-by-side
To delete blurry phone pics, etc.
Pro Multi-lingual
XnView speaks over 30 languages.
Pro Portable version for Windows available
Pro The FREE version has no basic functionality limits
Most of the premium features are about advanced filters, more presets and more image manipulation tools, but the free version is perfectly functional, with no time limits.
Pro It handles all picture file formats, but also most video and audio formats
It will handle both the standard formats, like png, jpg, bmp, gif, tiff and camera, and the RAW formats like crw, cr2, dng, eip, erf, nef, nrw, obm, orf, pef, raw. It can also handle many video formats: mp4, m4v, m4u, m4a, mkv, mov, and audio formats as well: opus, weba, webm, ogg, ogm, oga, wav, mp3, flac, m4v, acc.
Pro Lightweight
This app is really fast, and not encumbered even when it encounters folders with thousands of photos.
Cons
Con Very poor quality and very invazive on windows 10
Convert all images to 8bit rgb
[not suport 16bit or 32bit, cmyk, Lab, multichannel] so you never be able to see real original image, you only see the result of conversion...on windows 10 it enforced self promotion to default app for every type/format of image...
Con No Dark mode
Con No custom installation - if you need i.e. a language package, you need to install the full version
Con Free only for private use
For use in a company 1 license starts at 26 EUR.
Con Doesn't show movies on phone in correct position
Some of mp4 files shows in upside down position.
Con Doesn't pan/zoom fluidly with touchscreen
Con It lacks sophistication
A lot of filters, presents, and functions available in more sophisticated viewer programs are lacking here. It is recommended to check out the free version first to see if it suits your needs before upgrading to the paid version.