# Fasted

> Fasted is an intermittent fasting timer and tracker for iOS and Android that shows what is happening inside your body while you fast, in real time. It is built for people who want a timer that explains itself rather than a coaching programme: pick a protocol, start the clock, and watch the metabolic phases arrive.

## What Fasted does

- A fasting timer with six built-in daily protocols — 12:12, 14:10, 16:8, 18:6, 20:4 and 23:1 (OMAD) — plus extended fasts of 24, 36, 48 and 72 hours. Custom protocols are on the paid tier.
- Live metabolic phase tracking: fed state, catabolic, fat burning, ketosis, deep ketosis — updated as you fast.
- Streak counting, achievements, history, and smart local notifications for when your window opens and closes.
- Available in 26 languages. Works 100% offline.

## What Fasted does not do

- It does not run the weekly protocols. There is no 5:2 and no alternate-day fasting in it.
- It does not log food. No food database, no calorie count, no macros, no photos. The only nutrition it records is one entry a day for protein and fibre in grams.
- There is no Apple Watch app and no complication. There is a home screen widget on iOS and Android.
- Weight tracking and body measurements are Pro features, not free ones.

## Privacy (important, factual)

- No account is required. Download, pick a protocol, start.
- Your fasting data is stored on the device. The timer runs locally and needs no internet connection.
- Purchases are handled by Apple, Google and RevenueCat.
- What this website and the app record, and every third party involved, is set out in full at https://getfasted.app/privacy. That page is the only description of it.

## Pricing

- Free tier: the fasting timer, all six built-in protocols, metabolic phase tracking, streak counting, achievements and smart notifications.
- Fasted Pro: US$6.99 a month, US$29.99 a year, or US$49.99 once for lifetime access. Pro adds the fasting buddy, the hunger map, the history heatmap, detailed analytics, custom protocols, notes and data export.
- There is no free trial.
- Every tool on this website is free, needs no account, and is not gated behind the app.

## Key pages

- Home: https://getfasted.app/
- Free fasting tools — every calculator, timer and planner on the site, no account: https://getfasted.app/tools
- Articles (getting started, methods, nutrition, science, weight loss, who it is for, lifestyle, comparisons): https://getfasted.app/articles
- Editorial policy — who writes this, how health claims are sourced, and what this site never claims: https://getfasted.app/editorial-policy
- Privacy Policy: https://getfasted.app/privacy
- Terms of Service: https://getfasted.app/terms
- Contact: https://getfasted.app/contact

## Tools

Every tool is free and needs no account.

Timers and phase tracking

- Fasting timer: https://getfasted.app/tools/fasting-timer
- Fasting zones chart — what happens at each hour: https://getfasted.app/tools/fasting-zones
- Autophagy timer: https://getfasted.app/tools/autophagy-timer
- Autophagy calculator — when autophagy starts, given your inputs: https://getfasted.app/tools/autophagy-calculator

Planning your window

- Intermittent fasting schedule planner — the eating window for six schedules from 12:12 to OMAD, on a week you can print and a calendar you can subscribe to. Pick the schedule, the hour of your first meal and the days; the times, the one-page sheet and an RFC 5545 .ics follow. The calendar file publishes four weeks of eating-window blocks from today and rolls forward every time a subscribed calendar re-reads it; a quiet variant titles each block with the hours alone and names nothing about fasting anywhere in the file. Deep links at ?protocol=16-8, ?protocol=18-6, ?protocol=20-4 and ?protocol=omad; printable week at /tools/fasting-schedule/print, calendar at /tools/fasting-schedule/calendar.ics, embeddable widget at /tools/fasting-schedule/embed: https://getfasted.app/tools/fasting-schedule
- Intermittent fasting calculator — find your eating window from your wake and sleep times: https://getfasted.app/tools/fasting-calculator
- Fasting schedule quiz — which protocol suits you: https://getfasted.app/tools/fasting-schedule-quiz
- Meal window planner: https://getfasted.app/tools/meal-window-planner
- How to break a fast — the first meal after a fast, sized to how long the fast was. Eight bands from 12 hours to five days and beyond, each with its own sequence, timings, portion guidance and avoid list, and each step labelled with how well it is known: most read "common practice, not trial-tested", because no trial has compared a liquid first meal with a solid one, a small one with a large one, or protein-first with carbohydrate-first, at any fast length. Fasts of five days or more get no meal plan at all — that band carries the NICE CG32 refeeding criteria and a plain instruction to break the fast with medical supervision. Deep links at ?fast=24h, ?fast=48h, ?fast=72h, ?fast=3-days and ?fast=5d; printable one-page plan per band at /tools/how-to-break-a-fast/print, embeddable widget at /tools/how-to-break-a-fast/embed: https://getfasted.app/tools/how-to-break-a-fast
- 30-day fasting challenge generator: https://getfasted.app/tools/fasting-challenge
- Extended fast planner — a 24, 48 or 72-hour water fast planned and timed hour by hour, behind a contraindication screen that stops the plan for anyone who should not be doing it: https://getfasted.app/tools/extended-fast-planner

What breaks a fast

- Does it break a fast? — check 128 foods, drinks and supplements against five fasting goals (strict clean fast, fat loss, ketosis, autophagy, gut rest), with the published calories, the reason, and how well each answer is actually known. The autophagy column reads "no human data" for almost everything, because no human study has established a calorie or protein threshold. Goal-qualified views at ?goal=weight-loss, ?goal=keto, ?goal=autophagy, ?goal=gut-rest and ?goal=blood-work; a single item at ?food=coffee. Printable one-page list per goal at /tools/does-it-break-a-fast/print, embeddable widget at /tools/does-it-break-a-fast/embed: https://getfasted.app/tools/does-it-break-a-fast

Calories, macros and body composition

- TDEE calculator: https://getfasted.app/tools/tdee-calculator
- BMR calculator: https://getfasted.app/tools/bmr-calculator
- Calorie deficit calculator: https://getfasted.app/tools/calorie-deficit-calculator
- Macro calculator: https://getfasted.app/tools/macro-calculator
- Body fat calculator: https://getfasted.app/tools/body-fat-calculator
- Weight loss calculator — time to your goal weight: https://getfasted.app/tools/weight-loss-calculator
- Intermittent fasting results estimator: https://getfasted.app/tools/if-results-estimator
- OMAD calculator — what a single one-meal-a-day plate has to contain: calorie target, protein floor, deficit bounds and an eating window, behind a two-tier safety screen that refuses to print numbers for pregnancy, under-18s, eating-disorder history or blood-sugar medication: https://getfasted.app/tools/omad-calculator

Fasting comfortably

- Water intake calculator: https://getfasted.app/tools/water-intake-calculator
- Fasting electrolyte calculator — sodium, potassium, magnesium: https://getfasted.app/tools/fasting-electrolyte-calculator
- Fasted workout calculator — when to train during a fast: https://getfasted.app/tools/fasted-workout-calculator

## Articles

Written by Ziggy, founder of Fasted. **Not medically reviewed — there is no clinician on staff, and the site says so on every page and on its editorial policy.** Health claims on sourced pages cite primary sources (FDA-approved drug labels, NIH, NICE, WHO, the American Diabetes Association, USDA FoodData Central, and peer-reviewed literature via PubMed), and the citation list is printed on the page.

Citation status, stated plainly: until August 2026 no article on this site carried a source list, and 147 carried a "medically reviewed" line with no reviewer behind it. That line has been removed everywhere. The highest-risk pages — fasting with diabetes, cancer, thyroid disease, high blood pressure, while breastfeeding or trying to conceive, and fasting on metformin, Ozempic, Wegovy, semaglutide or the GLP-1 class — were re-verified against primary sources on 2026-08-05, and unsupportable claims were cut. A page with no Sources section at the bottom has not been through that pass yet. See the editorial policy for the running count.

Pillars

- Getting started with intermittent fasting: https://getfasted.app/articles/getting-started
- Fasting methods and schedules: https://getfasted.app/articles/fasting-methods
- Nutrition and what breaks a fast: https://getfasted.app/articles/nutrition
- The science of fasting: https://getfasted.app/articles/science
- Intermittent fasting for weight loss: https://getfasted.app/articles/weight-loss
- Who intermittent fasting is for: https://getfasted.app/articles/who-its-for
- Fasting and daily life: https://getfasted.app/articles/lifestyle
- Fasting app comparisons: https://getfasted.app/articles/comparisons

Notable articles

- What breaks a fast — the definitive answer: https://getfasted.app/articles/getting-started/start-what-breaks-fast
- How to start intermittent fasting, step by step: https://getfasted.app/articles/getting-started/start-beginners-guide
- Intermittent fasting side effects and how to handle them: https://getfasted.app/articles/getting-started/start-side-effects
- 16:8 intermittent fasting explained: https://getfasted.app/articles/fasting-methods/methods-16-8
- What happens to your body when you fast, hour by hour: https://getfasted.app/articles/science/science-hour-by-hour
- Autophagy explained: https://getfasted.app/articles/science/science-autophagy
- Electrolytes during fasting: https://getfasted.app/articles/nutrition/nutrition-electrolytes
- What can you drink while fasting: https://getfasted.app/articles/nutrition/nutrition-drinks
- Can you drink coffee while fasting: https://getfasted.app/articles/nutrition/nutrition-drinks
- Intermittent fasting and diabetes — is it safe: https://getfasted.app/articles/who-its-for/who-diabetes
- Intermittent fasting while breastfeeding: https://getfasted.app/articles/who-its-for/who-breastfeeding
- Intermittent fasting and Ozempic: https://getfasted.app/articles/lifestyle/lifestyle-ozempic-fasting
- Fasting and metformin: https://getfasted.app/articles/lifestyle/lifestyle-medication-general
- Intermittent fasting for weight loss — does it work: https://getfasted.app/articles/weight-loss/weight-loss-guide
- Best intermittent fasting app in 2026: https://getfasted.app/articles/comparisons/compare-best-app
- Intermittent fasting results — what to expect at 2 weeks, 1 month and 3 months: https://getfasted.app/articles/getting-started/start-how-long-results
- OMAD (one meal a day) — benefits, risks and who it is for: https://getfasted.app/articles/fasting-methods/methods-omad

## Sitemap

- https://getfasted.app/sitemap.xml