Your projects, side by side
Compare two sources
One article rarely tells you everything. Build a study project from each source you care about, then bring two of them here to see which points cover the same ground and what only one of them mentions.
It works by matching wording, so it points you at passages worth reading side by side rather than judging which source is right. Both projects stay on this device, and neither is changed by being compared.
Saved on this device
Compare two sources
Pick two projects you have saved. Novus Learn pairs sentences that use many of the same words, shows you both of them with the source each came from, and lists the words that caused the pairing.