Interesting App, I actually worked my Brain! We each practice the concepts contained within this online app/learning book, however, few of us actually know the name of the deductive methods we are using. It was good to learn the methods/terms used, but unless you are a scientist, philospher, investigator or practice law, then knowing the correct name for my current thinking process is irrelevant. When I am trying to figure things out, I use my mind, facts, and other information to just try and get the right answer! I suppose my simple mind is okay with not knowing the name for my thinking process. It's a great app, very informative and the pictures are great. I had no visual problems, but I am using a very large Samsung Galaxy Note Pro 12.2 screen, and yes, if the format did not adjust for smaller screens, yes, this app would be horrilbe to read. God bless each of you deductive, process naming, minds/people. :)
This is a really nice collection and pleasing to look at, however, as many have noted, the font size and zoom capability are terrible. I end up taking screenshots on my phone and zoom in on them each time I want to really read the full passages. If the devs can make the interface more user friendly, this app would be very nice indeed.
(Not phone friendly, best viewed on larger screens.) This app is a virtual book. It has illustrations and text, you press to flip pages. Your experience will depend largely on your device. The illustrations are cute, and the text is educational.
While an appeal to more reasoned discussions is exactly we need at this time, I cannot recommend this particular app as it seems to promote a specific worldview. It is not necessary for each example listed to be used to try to discount conservative thinking or promote liberal thinking and obfuscate conservative arguments. This author uses his platform to promote the gamut progressive ideas. Global warming, atheism, etc. Progressive propoganda disguised as a helpful little "logic" primer. Garbage. And shame on you.
This is a really well written book. It is best read on a tablet as the print is small. I have shared its concepts with my young daugters and they are really into it. This is really needed in this current chaotic political environment: it brings into high contrast the illogical policies and distractions...
I'm sorry to say that I must agree with other reviewers in saying that this app is unbearably small for comfortable use on a phone due to  TINY fonts and  no reasonable ZOOM controls. The content itself is top notch, but as an app this is very much a failure for devices with a small format display. (And my phone is quite large, yet this app is painful to look at). I would much rather pay for a hard cover copy in order to be able to read the thing than be forced to deal with this terrible Android "book" app.