The interface Readability is not much less convincing, but it is penalized by unsound choices regarding fonts: the creations of Hoefler & Frere-Jones are considered, but none are really suitable for prolonged reading. The night mode of readibility nonetheless seems to be the most subtle of the three applications. Again, Pocket is halfway: it offers only two fonts, but both are excellent choices (including Proxima Nova), and enough in the end.
