Coming soon to the App Store ClearHalf app icon

ClearHalf

Log a coffee or a drink and ClearHalf forecasts the exact hour your body runs clear, so you can protect your sleep and make calmer calls. A personal Body Clock on your iPhone, Lock Screen, widgets, and Apple Watch.

Free Offers In-App Purchases
iPhone & Apple Watch Widgets and Live Activities
Ages 17+ Health & Fitness

Overview

ClearHalf turns caffeine and alcohol from a guessing game into a clear forecast.

Log a coffee, tea, energy drink, or a glass of wine, and ClearHalf shows your Body Clock, an hour-by-hour curve of how much is still in your system and the exact time you'll run clear. Set your bedtime and it warns you when a late cup will still be working at lights-out.

What You Can Do

  • Forecast when caffeine and alcohol clear your system
  • See a live, hour-by-hour Body Clock curve
  • Check bedtime and next-morning carryover
  • Calibrate estimates to how your body actually feels
  • Get bedtime warnings before a late drink hurts sleep
  • Spot patterns and run simple timing experiments
  • Glance at Lock Screen Live Activities and widgets
  • Log and check from Apple Watch, with complications
  • Export your full log history as CSV

Private by Design

  • No account required
  • Estimates run on your device
  • Your logs are never sold or used to track you

ClearHalf gives estimates to help you plan. It is not medical advice and should not be the sole basis for driving, medical, work, or other safety-critical decisions.

Subscription Terms

  • ClearHalf Premium: $0.99 / month
  • ClearHalf Premium Annual: $5.99 / year

New subscribers start with a 7-day free trial. Prices are in US dollars; your local price is shown in the App Store at checkout. Payment will be charged to your Apple Account at confirmation of purchase. Subscription automatically renews unless it is cancelled at least 24 hours before the end of the current period.

Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel subscriptions in your App Store account settings.

App Store Details

  • Requires iOS 17.0 or later
  • Includes an Apple Watch app
  • Category: Health & Fitness
  • Age rating: 17+

Download and Support

ClearHalf is coming soon to the App Store. Privacy Policy and Terms of Use are available below.

ClearHalf home: the Body Clock forecasts your caffeine curve through bedtime and morning ClearHalf alcohol forecast: an estimated overnight clearing window, not a BAC or sobriety tool ClearHalf everywhere: Live Activity, Lock Screen widgets, and Apple Watch complications