A read at a decision point, or a read that lives where you write.
Inkshift is designed for a moment: the manuscript is complete or nearly so, and you want a clear outside assessment before you dive into revision. For that decision point, a focused, unbiased read is exactly right.
DraftProse is not a moment, it is the room the draft grows in. The Reader runs whenever you want, on whatever version exists, so you watch the structure change as you write rather than reading one assessment at the end.