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FastNow is a lifestyle and tracking tool, not medical advice. Consult your doctor before starting any fasting or calorie restriction program.
The base trackers — fasting, walking, food, weight — are free for everyone. Sponsorship unlocks the structured 90-day Challenge and AI food logging.
Free intermittent fasting tracker — pick a window, run it with a live timer, and keep a rolling record of what you actually did.
Run a deliberate long fast from 24 to 168 hours, with hour-by-hour stage content and milestone callouts.
Free weight tracker — log daily, edit recent entries inline, and see 7, 30, or 180 days at a glance.
Free walking tracker — start a timer, pick your pace, and let pause/resume handle real-life interruptions.
Free calorie tracker — log meals once, save them to My Foods, and watch your daily remaining calories update live.
The structured challenge mode — set a goal weight, pick 30 to 180 days, and the app aggregates every food, walking, and weight entry into one timeline. Unlocked with sponsorship.
Free intermittent fasting tracker — pick a window, run it with a live timer, and keep a rolling record of what you actually did.
Twelve built-in schedules from 12:12 through 23:1 (OMAD), plus a custom window in one-hour steps. Start fasts manually after your last meal, or lock the eating window to fixed daily clock times that cycle automatically. A timer shows elapsed and remaining time, current phase, your eating window, and a running count of days you have kept the cycle going — all backed by a 30-day session history.
Run a deliberate long fast from 24 to 168 hours, with hour-by-hour stage content and milestone callouts.
Sessions from 24 up to 168 hours (one to seven days). Quick-select presets for 48h, 60h, and 72h, or set any length on the slider. Already underway when you open the app? Backdate the start by up to the fast length minus an hour. Past the first day, the screen surfaces hour-by-hour stage content from our fasting library and calls out ketosis, autophagy, and fat-burning milestones as you pass them.
Free weight tracker — log daily, edit recent entries inline, and see 7, 30, or 180 days at a glance.
Manual daily weight entry with kg or lbs display. Entries within the last 24 hours are editable inline. History loads in 7, 30, or 180-day windows with a load-more beyond. Goal weight is editable inline and syncs to your active 90-day journey so daily calorie and burn targets stay aligned. Show Empty Days highlights gaps. Calendar view lays the month out visually. A deep link opens the add-weight modal from anywhere in the app.
Free walking tracker — start a timer, pick your pace, and let pause/resume handle real-life interruptions.
A manual timer-based tracker — tap Start when you begin walking, set your pace from the speed selector, and the timer counts up. Pause and Resume preserve elapsed time when you stop for a traffic light or a call. Before saving, Manual Duration lets you correct the elapsed time if the timer was left running. Daily step and distance goals live in your profile. The 7-day stats card shows the week at a glance. Log Other Activity covers workouts that aren't walks.
Free calorie tracker — log meals once, save them to My Foods, and watch your daily remaining calories update live.
Manual meal entry with a growing My Foods library, reusable meal Templates, and a Suggested list of what you logged recently. Your daily calorie target sits at the top of the day with live remaining calories as you log. Carbs are always tracked; protein and fat toggle on from your profile if you want full macros. Copy Yesterday in one tap. Edit any logged meal's calories inline. History keeps 30 days by default with load-more beyond.
The structured challenge mode — set a goal weight, pick 30 to 180 days, and the app aggregates every food, walking, and weight entry into one timeline. Unlocked with sponsorship.
The 90-Day Challenge turns the free trackers into a structured program. Pick a window from 30 to 180 days — fixed, not adaptive. Set your start weight, goal weight, daily calorie target, and daily burn target. The Challenge shows Day X of Y with a progress bar, countdown, and projected end date. Food, walking, and weight entries auto-aggregate into each day's card in the timeline. Goal weight is editable mid-challenge and recalculates daily targets. Completed challenges can be reactivated within 24 hours, or scheduled to start on a future date. Sponsorship feature.
Yes. The web app works on every iOS device — iPhone and iPad included. Open it in Safari and add it to your home screen for an app-like experience. No App Store download required.
Not yet. We built the Android app first. The web app is fully-featured on iOS and covers every part of the protocol — the fasting timer, food logging, walking tracker, and everything else.
No. The web app is the same app. Fasting timer, food logging, walking tracker, weight tracking, motivators — all features work on every platform, including iOS.
Yes — any modern browser works. Your data syncs across all your devices through your account, so you can pick up where you left off no matter what you are on.
Yes — same features, same data, same account. The only meaningful difference is push notifications: only the Android app delivers native push, while the web app uses in-app reminders. Pick whichever fits the device you're on.
The base trackers — fasting, walking, food, weight — are free forever. Sponsorship unlocks the 90-day Challenge mode and AI food logging on top.
The web app works on iPhone, Android, desktop, and tablet — same experience everywhere. Prefer a home-screen icon and native notifications on Android? Get the Android app instead.