Cafactor
Track caffeine. Protect sleep.
About
This app models your body's real-time caffeine levels using a scientific pharmacokinetic approach. It helps you understand your caffeine absorption, decay, and personal sleep thresholds, adapting to your unique biology and activity. Connect with health data for an even smarter metabolic coaching experience.
What's New in Cafactor
2.0.4
May 5, 2026
Added an Imperial Units toggle in Settings. When enabled, body weight switches to lbs, height to inches, and drink volumes to fl oz, all display-only conversions, with no changes to your existing data.
MoreIn-App Purchases
$3.99
Cafactor Pro
Unlock Pro forever. One-time purchase, no subscription.
Developer apps
FAQ
Does Cafactor have ads?
No, Cafactor is ad-free. The core tracking functionality is always free and does not contain advertisements.
How accurate is Cafactor's caffeine modeling?
Cafactor uses a peer-reviewed pharmacokinetic model and personal biological parameters to compute your real-time caffeine curve. It incorporates factors like absorption, decay, and personal physiology for realistic estimations.
What personal data does Cafactor use?
Cafactor uses your sex, height, weight, age, smoking status, hormonal medication, and pregnancy status to calculate how caffeine distributes in your body. It also derives your tolerance from a 7-day history.
How does Cafactor integrate with Apple Health?
When connected to Apple Health, Cafactor acts as an adaptive metabolic coach. It uses exercise data to adjust your decay curve, sleep quality to modify your safe window, and HRV & Recovery to create a PhysiologicalState score.
What are the Pro features in Cafactor?
Pro features include unlimited history, trend and scatter charts, last safe caffeine time, four smart notifications, shareable weekly reports, Siri shortcuts, and unlimited custom drinks.
Is Cafactor available on Android?
Based on the provided data, Cafactor is supported on Apple Watch, iPhone, and iPad, indicating it is an iOS-exclusive application.
How often is Cafactor updated?
The latest version of Cafactor is 2.0.4, which was last updated on May 5, 2026. This suggests a commitment to regular updates and improvements.
What is the age rating for Cafactor?
Cafactor has an age rating of 4+, making it suitable for a wide range of users. The app focuses on health and fitness tracking.