Spritz does pretty much just that - take the content on a page and shows a popup with just one word at a time. https://spritz.com/ I find my eyes to feel a bit strained after using this for a while though. Source: about 1 year ago

A way better version of this is https://spritz.com/ but the principle is the same. Source: about 1 year ago

I see you're providing several different ways to read. Have you considered adding something like https://spritz.com (there are many clones as well). I find it really helps with reading speed, but it's never something I remember to use. I think if it was integrated with a service people were already using it would be a nice value add and easier for people to work it into their workflow. Source: over 1 year ago

I have a similar app as well called spritz. Source: almost 2 years ago

The effect is almost as good as the one through spritz or similar apps which isolate words from the "visual/sensory noise" of surrounding text. Source: about 2 years ago

That looks pretty awesome! I also found WaspLine Reader, which is similar but free and open source. Source: about 2 years ago