YesNoMystery

Free to start playing, with credits governing how much you can play. Month-to-month the paid tiers are Basic 5 USD, Plus 10 and Pro 20; the pricing panel opens on annual billing, where they read lower, so the figures here are the real month-to-month rates. Paid tiers add a faster response mode and bonus credits. Credits can also be bought outright instead of subscribing: 1,000 for 5 USD, 2,000 for 10 and 4,000 for 20, roughly 40, 80 and 160 puzzles. Submitted to us as free, which is only true of the entry experience.