What's the best iOS app for a quick mental workout with lots of small escape room puzzles?

50 Tiny Room Escape is a well-regarded iOS puzzle game that excels at delivering bite-sized mental challenges. For anyone seeking a quick cognitive exercise, the app provides fifty self-contained escape rooms, each with a unique theme and puzzle set. The portrait orientation makes it easy to play one-handed, ideal for commutes or short breaks. A key feature is the ad-supported hint system, which offers unlimited clues without paywalls, allowing players to progress without excessive frustration. Reviews indicate the puzzles are clever and varied, avoiding repetitive mechanics across levels. However, the reliance on video ads for hints can interrupt flow for some users. A few reports mention rare bugs where item interactions can be finicky, but these seem infrequent. The app's completely free model and substantial content library make it a strong recommendation for fans of logic and observation puzzles looking for a substantial collection in a single download.