Sequence Sleuth
number · Wildcard, weekly
Four terms are shown. Guess the next one. You get three guesses, and each miss reveals another term.
Four numbers, and the question is what comes fifth. You have three guesses, and each wrong one shows you another term, which usually makes the rule obvious and the score smaller. The good ones have two plausible rules that agree on the first four terms and part company on the fifth.
When you will see it
Sequence Sleuth is a Wildcard. It takes the fourth slot for a week at a time, on a rotation through twelve candidates.
The rules, in one line
Four terms are shown. Guess the next one. You get three guesses, and each miss reveals another term.
This is the same sentence the app shows above the board, so nothing here is a paraphrase of the real rule.