Vitamind vs CogniTrack

The sun is nature's best source of energy. But how much sun do you need to get enough Vitamin D, and when is it actually strong enough? Vitamind takes the guesswork out of it. We help you find the perfect time window to get your daily dose of sun – safely, naturally, and personalized for you. How it works: The sun needs to be at a certain angle above the horizon for your skin to produce Vitamin D. By combining your location, real-time weather data (including UV index and cloud cover), and your skin type, the app calculates exactly when you should head outside. Key Features: Smart alerts: Get a push notification the moment the sun is strong enough (when the "Vitamin D window" opens). Personalized: Calculates the time you need based on your specific skin type (I-VI). Practical estimates: See how many minutes you need outdoors, whether you're wearing "T-shirt and shorts" or just exposing your face and hands. Visual dashboard: Track the sun's path and plan your day with our simple, easy-to-read Vitamin D graph. Disclaimer: This app provides general estimates based on algorithms and weather data, and is not intended as medical advice. Everyone's skin reacts differently. Use at your own risk and always avoid sunburn.

Ever wonder whether your mind is as sharp as usual — or if fatigue is quietly slowing you down? CogniTrack gives you an objective answer. Using a scientifically validated reaction time test, you can measure your mental alertness in under a minute and track how it changes throughout the day. HOW IT WORKS When a visual cue appears on screen, tap as fast as you can. Your reaction times reveal how alert and focused you are in the moment — no guesswork, no subjective ratings. The test is powered by the Psychomotor Vigilance Test (PVT), the same method used by NASA, the US military, and sleep researchers worldwide to assess sustained attention and fatigue. SET YOUR PERSONAL BASELINE Start by taking a 10-trial baseline test when you're fully rested — ideally first thing in the morning. This establishes your personal "best" reaction time as a reference point. Then use quick 6-trial checks throughout the day to see how you compare. Are you still sharp after lunch? How about late in the evening? After that extra cup of coffee? Now you'll know for sure. WHAT YOU'LL DISCOVER • How sleep quality affects your next-day performance • The real cognitive cost of staying up late • Whether caffeine, naps, or breaks actually help • Your personal alertness patterns over days and weeks FEATURES • Quick Check — A fast 6-trial test you can do in under 30 seconds • Personal Baseline — Establish and update your rested reference point • Trend Charts — Visualize your alertness patterns over 7, 30, 90 days, or all time • Performance Ratings — Instantly see if you're performing at Superb, Good, Sluggish, or Impaired levels relative to your baseline • Full History — Browse, search, and review every test you've taken • Guest Mode — Let friends or family take a test on your device without affecting your data • Data Export & Import — Back up your records as JSON whenever you want • Privacy First — All data stays on your device. No accounts, no cloud, no tracking. BUILT FOR SELF-AWARENESS CogniTrack is not a game — it's a personal wellness tool designed to help you build self-awareness about your cognitive performance. By making mental alertness measurable, you can make better decisions about rest, work, and daily routines. Note: CogniTrack is a wellness tool, not a medical device. It is not intended to diagnose, treat, or prevent any medical condition.