There are many PDF viewers and online documentation tools available for Chrome. The functions and features of each app are more or less the same, but they all have different twists and tweaks in terms of specific uses and overall layout.
Comparing Kami (formerly Notable PDF) with DocHub, it is easy to see why Kami is the better choice between the two.
Interface and Visuals
Dochub’s basic overall layout can be described in one word: well-recognized. Familiarity is the most important feature, and perhaps the trump feature, of DocHub’s interface design. Accessing files and editing them in DocHub feels very much like how you would edit a document using standard word-processing software, such as Microsoft Word. However, apps nowadays mostly rely on the value of simplicity of the design of its interface and visuals. For this, Kami gains the upper hand, preferring to focus on making the use of the app as simple as possible for any user. With Kami, the buttons and options layout feels more intuitive, and provide easier access and faster editing than DocHub.
Accessing files for Kami and DocHub is as easy as accessing files on your regular file explorer. Once files are downloaded and active, you are automatically given extra options to open certain files using these apps, so there is no need to activate something or to open something in advance just to make use of both apps’ features. Also, connectivity, compatibility, and synchronization with most cloud-based file-hosting services makes these two apps equally convenient as a web-based documentation tool. As a Chrome-based app, both have the obligatory Google Drive access, for instance, as well as access to other popular file-hosting tools such as Dropbox. The two even have direct import access to any web page that may contain information that you need to edit or annotate.
The contest for this criterion ends up more or less in a tie.
Editing and File Management
DocHub is directly designed as a web-based documentation tool, or at least it is introduced by many casual users as such. So even if it is advertised as a PDF viewer, its layout, design, features, and editing options are very much like a standard word-processing software program. Kami, on the other hand, is more or less featured as an information-extraction tool. Yes, it can also function as a sort of word-processing tool. However, its editing options are more focused on annotations, highlighting, document analysis, and signage, among other things, that are required for accessing and editing files that are already available (and/or finished) in the first place. It is much more suitable for use in online research, for example, and perhaps ultimately the better tool in providing editing analysis outside of standard online editing apps such as Google Docs.