Most of us think we know the world's number ones. Which country has the most islands? Not Indonesia or the Philippines - Sweden. The most time zones? Not Russia - France. The most bridges? Not Venice - Hamburg. Ranking Trivia Quiz is 150 questions built on exactly these gaps: three plausible answers, one surprising #1, and a short explanation of why. Five questions a round, about a minute, on the train or offline. Free with ads, no account, in 17 languages.
Most of us open a breathing app at the exact moment we can least handle friction: before a presentation, at 2am, in a hospital waiting room. Too often the first breath comes after onboarding, a mood quiz, a sign-up and a trial offer. Deep Breath Plus starts in one tap, and gives inhale, hold and exhale each their own vibration, so you can follow along with your eyes closed or the screen off. Free, no account, records stay on your device. Some screens show ads, never mid-session.
Most of us have a ruler app we have never checked against a real ruler. Phones don't tell apps how big their screens physically are, so every screen ruler starts with a guess - on a recent iPhone Pro, an unchecked 10 cm can stretch to 10.6 cm. Simple Ruler fixes that in seconds with any credit card, then measures length, gaps, width x height and angles. Lay a screw or a SIM tray on the screen and read it in millimeters. Free with ads, offline, no account.
