Tide: The First Adaptive Nutrition Coach Powered by Apple Watch Signals

Tide is a new nutrition app that helps people eat better by using data from their Apple Watch. Instead of giving the same calorie goals every day, Tide changes your daily food targets based on how your body feels right now. It looks at sleep, heart rate, workout intensity, and wrist temperature to give you a personalized plan that adapts to your recovery needs.

Benefits

Tide solves the problem of using old methods that do not change with your body. Most other apps use a static approach where you set one calorie number for months and never change it. This ignores rest days or busy workout weeks. Tide also avoids trend-based tracking that only looks at weight averages over weeks. This method fails to notice when you are not recovering well. Tide uses a daily adaptive approach that recalibrates your goals every night. This ensures your nutrition plan matches your current physical state. The app uses four specific signals to make decisions. These include sleep duration and quality, heart rate variability, training strain, and wrist temperature. Each signal is weighted based on how recent it is and how well it predicts your needs. The app uses an AI model that learns your specific body type. During the first two weeks, it builds a personal baseline. After that, it uses your unique data to make smarter decisions. Crucially, the AI runs on your phone, which keeps your private health data safe. You can also talk to the app in plain English to ask questions like Can I have dessert tonight. The app explains its reasoning so you know exactly why your target changed.

Use Cases

Tide is designed for people who use an Apple Watch and want a smarter way to track their nutrition. It works best for athletes or active individuals who need to balance their diet with their training load. The app helps users plan their meals around upcoming workouts. For example, if the system predicts a leg session tomorrow, it suggests eating more carbohydrates before 3 p.m. The iPhone dashboard shows the remaining calories and the factors that influenced today's target. Users can also check their daily goal on their Apple Watch with a quick glance. This is useful for anyone who wants to avoid under-eating during poor sleep streaks or over-eating on rest days. The app is particularly helpful for people who find traditional calorie counting too rigid or stressful.

Pricing

Tide offers a free version and a paid Pro plan. The free version includes manual food logging, basic Apple Watch sync, one nutrition goal, and seven days of history. It does not include the adaptive engine. The Pro Monthly plan costs $6.99 per month and includes a fourteen-day free trial. This unlocks the adaptive engine, the full Apple Watch app, recovery insights, refeed-day detection, and unlimited history. The Pro Annual plan costs $49.99 per year and saves forty percent compared to the monthly rate. It includes all Pro features plus priority email support and early access to new features. All paid plans start with a fourteen-day free trial. No credit card is needed to start, and you can cancel anytime.

Additional Information

Tide requires an Apple Watch Series 8 or newer for full functionality. This includes the SE 2nd Gen and Ultra models. Older watches like Series 6 or 7 with iOS 17 will work in a degraded mode using three signals instead of four. The app prioritizes privacy by keeping health data on the device by default. Aggregate model training is opt-in and end-to-end encrypted. Tide never sells or rents user data. The app does not run analytics SDKs for advertising. The public TestFlight opens this quarter. Early waitlist signups receive access first and help shape the roadmap. The App Store launch is targeted for late summer.