INTERMITTENT
Personalised Fasting Tracker

Yourfasting.Reimagined.

Track your fast, understand your metabolism, and build lasting habits with the most personalised fasting app available.

Download for iOS

No account required. Your data stays on your device.

00:00:00Fat Burning
Est. Fat Burned42g
Est. Ketones0.8 mmol/L
Est. Glucose4.2 mmol/L
4.8 App Store Rating // 40+ Science Articles // 7+ Fasting Protocols // 100% Privacy-First // No Account Required // 6 Metabolic Stages Tracked // Personalised to Your Body // Available on iOS // 4.8 App Store Rating // 40+ Science Articles // 7+ Fasting Protocols // 100% Privacy-First // No Account Required // 6 Metabolic Stages Tracked // Personalised to Your Body // Available on iOS //
Features

Everythingyouneedtofastsmarter

From personalised plans to real-time metabolic tracking — tools to understand your body and build lasting habits.

Personalised Fasting Plans

7 built-in protocols from 12:12 to 24-Hour, plus fully custom plans. Recommended based on your unique profile.

Real-Time Metabolic Tracking

Six metabolic stages tracked live — from Fed State to Deep Autophagy. Know exactly what your body is doing.

Body Metrics Dashboard

Weight, ketones, glucose, body fat, BMI — tracked over time with beautiful charts.

Smart Water Tracking

Personalised daily water goals with intelligent reminders.

40+ Science Articles

Fasting science, nutrition, metabolic health, women's health — all in-app.

Intelligent Notifications

Morning reminders, electrolyte nudges, milestone celebrations. Respectful and customisable.

Personalisation Engine

Notallbodiesfastthesame

Everything is calculated based on your unique body and profile. No generic plans.

Basal Metabolic Rate

Mifflin St Jeor formula, adjusted for sex and age

Total Daily Energy

Calibrated to your activity level

Fat Burn Curves

Based on your body composition

Ketosis Threshold

Adjusted for sex, eating style, fasting history, age

Ketone & Glucose

Personalised estimates throughout your fast

Plan Recommendations

Generated from your complete profile

Whathappenswhenyoufast

Six metabolic stages. Tracked in real time. Personalised to your body.

01
0–4h

Fed State

Body using glucose from your last meal as primary fuel.

02
4–8h

Early Fasting

Insulin dropping. Shifting toward fat as fuel.

03
8–12h

Fasting State

Glycogen depleting. Fat mobilisation increasing.

04
12–16h

Fat Burning

Predominantly burning fat. Growth hormone elevated.

05
16–24h

Ketosis

Peak ketone production. Mental clarity at its highest.

06
24–48h

Deep Autophagy

Cellular cleanup. Body recycling damaged cells.

Health-First

Builtwithyourhealthinmind

Intermittent adapts its recommendations, language, and features based on your health conditions. Your safety is not optional.

Diabetes

Capped recommendations, glucose disclaimers, persistent safety banners.

Heart Conditions

Flags fasts over 20 hours, safety modal on first use.

Eating Disorders

Weight-loss language removed. Weight goals and calorie metrics hidden.

Pregnancy

Full-screen safety interstitial. Metabolic estimates disabled.

Nursing

Fasting capped at 14:10. Water goal automatically increased.

GLP-1 Medications

Glucose adjustments, capped at 16:8, extended fast advisory.

Pro

Onesubscription.Everyfeature.

Unlock every part of Intermittent with Pro.

Pro

Everything Intermittent has to offer.

  • Fasting timer with metabolic tracking
  • All 7 fasting protocols + custom
  • Weight, ketone, glucose tracking
  • Water tracking with reminders
  • 40+ science articles
  • Smart notifications
  • Guided multi-week fasting plans
  • Fasting challenges
  • Progress photos
  • Data export (CSV and PDF)
  • Zone detail science cards
See all Pro features

Startyourfirstfasttoday

Download Intermittent. No account required. Your data stays on your device.

Download for iOS