Caffeine Calculator & Tracker

Caffeine Calculator helps you understand how your next coffee, tea, cola, or energy drink may affect the rest of your day and tonight's sleep. - Log common drinks quickly using practical serving-size estimates - Personalize estimates with weight, schedule, and research-supported metabolism factors - See estimated caffeine remaining now, a possible bedtime range, and a suggested last-drink time - Touch the metabolism curve to read estimates at a specific time - Review 7- and 30-day intake, timing, and bedtime residual trends - Explore your year in review with monthly totals and unlogged days, then preview a locally generated image before choosing to share it - Save custom drinks, keep long-term history, and export CSV - Choose from five themes with matching app icons No account is required. The current version contains no ads, third-party analytics, or cross-app tracking. Your information stays on your device by default. Optional cloud backup: after you explicitly enable it, manually back up drink records encrypted on your device. The backup does not include your profile, health factors, or purchase entitlements. Keep your recovery code safe to preview and restore records; cloud deletion is a separate action. This is manual backup, not automatic sync. Primary backup storage is in Singapore, and request processing may occur in the United States. Apple manages purchases and purchase restoration separately. Local logging and estimates work without enabling cloud backup. Health disclaimer: This app provides research-based estimates and reference ranges. It is not a medical device and does not diagnose, treat, or provide individualized medical advice. Individual responses may vary with health conditions, pregnancy or breastfeeding, medication, and other factors. Consult a physician or pharmacist when appropriate. Access and purchases: Completing your first profile starts a 7-day full-access trial on this device. No subscription or automatic charge starts with this trial. After it ends, choose a monthly subscription, annual subscription, or one-time lifetime purchase to keep using core features. Without a purchase, you can still view and export existing history and delete your local data. Monthly and annual subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Payment is charged to your Apple Account when you confirm a purchase. You can manage or cancel subscriptions in your App Store account settings. Lifetime access is a one-time purchase and does not renew. Prices are shown for your App Store region before purchase. Terms of Use (Apple standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://caffeine-calculator.com/privacy/