[matsemann]

True. You made me remember a different concept, where words would flash at the same point, but centered around some fixed highlighted character per word. https://m.youtube.com/watch?v=ky8DP55YEO0

Edit: but thank you for sharing your concept here, very interesting, and I like the discussions it created.

[moritonal]

Ironically (given the GP comment) this tech also died because of their aggressive attempt to commercialise it.

[kranner]

I had an iOS speed-reading app at the time and considered integrating their API because users requested it. Not only would they have required individual users to sign in to their API via my app, IIRC their terms allowed them to track what each user was reading. Naturally I declined. I hope OP’s terms of use are more respecting of user privacy.

[renato_casutt]

Thank you matsemann