MindMetrics: Memory Test Games

MindMetrics has eight short brain games, and each one ends with a number. The reaction time test gives you a time in milliseconds. Number Memory counts how many digits you can hold in your head. Half of them are memory tests, and every game keeps your best score, so there's always something to beat. You don't need an account, and all eight games work without an internet connection. THE MEMORY TESTS • In the Chimp Test, numbers appear on a 5 by 5 grid and then hide. Tap their squares in order from 1. It starts with 3 numbers and adds one per level. You pick how long they stay visible (6, 3 or 1.2 seconds), and the 1.2 second setting doubles your score. • Number Memory shows a number for one second per digit, then you type it back. Each level adds a digit. • A few squares light up in Visual Memory, then go dark. Tap all of them, in any order. Three squares at first, one more each level. • Sequence Memory is the old four color button game. Watch the red, green, blue and yellow buttons flash, then repeat the pattern. It gets one step longer every round, and the playback speeds up a little as it grows. The Chimp Test gets its name from a 2007 study at Kyoto University, in which a young chimpanzee called Ayumu outscored university students at a version of this memory test. In later studies, people who practiced caught up. THE OTHER FOUR • Reaction Time is a straight reflex test. The screen goes red, then turns green after 2 to 5 seconds. Tap the moment it changes. Jump the gun and that try doesn't count. • Mental Math gives you 60 seconds of arithmetic. Five right answers in a row bring in multiplication, and ten in a row add division and numbers up to 100. Get one wrong and you're back to the easy problems. • Color Match shows a color word in the wrong ink, like RED written in blue, and asks you to tap either the ink or the word. The prompt picks one at random each round. You get 5 seconds per round and 3 lives. It's a version of the Stroop test, which psychologists have used since the 1930s. • One tile in Odd One Out is a slightly darker shade than the rest. Find it. The grid grows from 2 by 2 to 7 by 7, and the difference gets smaller as you go. In six of the games, one mistake ends the run. Color Match gives you three lives, and Mental Math just runs until the clock hits zero. Your personal bests are saved on your phone, one per game, and the home screen shows how many of the eight you've set so far. That's the only tracking. There's no history or chart, just your best. MindMetrics isn't an IQ test or a medical test, and I won't claim it makes you smarter. It puts a number on things you do all day without thinking, like keeping a phone number in your head or reacting when a light turns green. PRICE AND ADS MindMetrics is free. A banner ad sits at the bottom of the screen, except in Reaction Time, where a fast tap could hit it by mistake. There are no full screen ads and no in app purchases. All eight games are open from the start. It runs on Android 7.0 and newer. There's a light and a dark theme, or it can follow your phone's setting. QUESTIONS Does it work offline? Yes. The games don't need internet. Can I compare scores with friends? Not inside the app. There are no accounts or leaderboards, so a screenshot is the way to do it. Will it nag me to play every day? No. The app doesn't send notifications. Found a bug, or want a ninth game? Email me at filipnordquist@protonmail.com.