Caffi vs OpenPPG

Track your caffeine intake, optimize your sleep, and take control of your energy levels. Do you ever wonder how much caffeine is still in your system? Or why you have trouble sleeping after an afternoon coffee? This caffeine tracker helps you log your drinks, see your current caffeine levels, and predict how much caffeine will still be in your body at bedtime—so you can make smarter choices and sleep better. Features: - Caffeine Tracking Made Easy Log your drinks in seconds with a database of popular beverages from Starbucks, Dunkin’, McDonald's, Celsius, Red Bull, Monster, and more. Manually enter custom drinks if needed. === - See Your Caffeine at Bedtime Instantly calculate how much caffeine will still be in your system when you go to sleep. === - Plan Your Next Drink Find out if that afternoon coffee will keep you wired at night before you take a sip. === Track Trends Over Time View your caffeine intake over days, weeks, or months and see your most consumed drinks. === Stop guessing. Start tracking. Download now to take control of your caffeine intake. Payment will be charged to your Apple ID account at the confirmation of purchase. The subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours before the end of the current period. You can manage and cancel your subscriptions by going to your App Store account settings after purchase. Cancellation of the current active subscription period is not allowed. Terms of Use: https://pattammaro.com/caffi/terms-of-use Privacy Policy: https://pattammaro.com/caffi/privacy-policy

OpenPPG is a free, research-oriented iOS application designed to close the gap in accessible and transparent PPG data acquisition. Built by researchers for researchers, it enables recording of raw, high-quality photoplethysmography (PPG) signals directly from the smartphone camera, with full export for scientific analysis. Key Features • Raw signal access – capture unprocessed PPG waveforms with complete control over export (CSV format). • Flexible preprocessing – raw signals, basic and advanced filtering, signal quality assessment or fully calculated metrics in one app to enhance your research • Feature extraction – access directly over 11 automatically calculated temporal and morphological metrics without need for advanced signal processing • Metadata & annotations – mark events while taking measurements in real time and customise forms to fit your study protocol • Explainable pipeline – reproducible acquisition process with transparent documentation to ensure research reliability. Why OpenPPG? Most mobile tools restrict access to raw data, hide acquisition details, or require payment. OpenPPG removes these barriers by providing a free, standardised, and reproducible way to acquire PPG signals. It supports innovation in signal processing, machine learning, and digital biomarker discovery. Important: OpenPPG is intended solely for research purposes. It is not a medical device and must not be used for diagnosis, treatment, or patient self-monitoring.