Not one Loopa picked
Set the schedule that fits your life. The app tracks it; it does not prescribe it and it does not push you to extend it.
Intermittent fasting
Track the fasting schedule you chose.
A timer for 16:8, 18:6, 20:4, OMAD or a window of your own, with your history behind it and the clock on your lock screen.
Requires Loopa Premium Food, water, weight and vitals stay free.
Fasting is optional, and it is not appropriate for everyone.
Fasting is not for everyone
Talk to a doctor before you start if you are pregnant or nursing, under 18, underweight, diabetic, taking any medication, or have any history of disordered eating. Insulin and sulfonylureas in particular change what skipping a meal does.
Loopa is a timer and a record. It does not assess whether fasting is safe for you, and nothing in the app, including the coach, will clear you to fast. If you feel faint, dizzy or unwell, stop and eat.
Why it matters
A timer, and the rest of the day around it
Most fasting apps are a clock and nothing else, so the window sits in isolation from the food, the weight, the sleep and the training it is supposed to be affecting. In Loopa the timer is one thing on a page that already holds the rest, which is the only way to see whether it is doing anything for you.
Food, weight, sleep, training
The same record, so a month of fasting sits next to a month of weight and a month of how you slept.
Deliberately
The streak counts days you met the window you set. Setting a longer one does not score higher.
The schedules
Pick a window, or write your own
The four common daily patterns, and a custom length for anything else.
Sixteen hours fasting, eight eating
The most common starting point. Usually means skipping breakfast or finishing earlier in the evening.
Eighteen and six
A tighter window, often one meal and one substantial snack.
Twenty and four
A single afternoon or evening eating window.
One meal a day, a 23-hour fast in Loopa
The tightest of the daily patterns.
Any window you set
For a schedule that does not match a preset, or a shorter one while you are starting out.
Every window you have completed
With how long it ran and whether it met the target you set.
Extended fasting
Longer fasts are a different thing, and Loopa treats them that way
The app can time a fast longer than a day. That is a capability, not a recommendation, and it is deliberately not presented as the next step after 20:4.
A fast of 48 hours or more will not start until you have read and acknowledged a health notice. It names the risks plainly, tells you to keep fluid and electrolytes up, tells you to stop and seek care if you feel dizzy or faint or notice your heart racing, and says extended fasting should be undertaken only under the care of a clinician. It cites the National Institute on Aging, and it is not skippable.
Prolonged fasting can carry significant medical risk and should only happen under appropriate medical supervision. That Loopa will keep a timer does not mean Loopa recommends the fast or is supervising it.
There is no badge for going longer, no record for your longest fast on any screen, and nothing in the app that treats a longer window as an achievement.
What the app shows you
A clock, a history, and general physiology
Worth knowing which of these is a measurement and which is background.
Exact
Elapsed time against the window you set, on the screen, the lock screen and a widget. This one is simply a clock.
Your own record
Every window you have completed, how long it ran, and whether it met the target you set.
General, and variable
The app shows a broad sequence with rough hours attached. The timings differ a great deal between people and depend on what you last ate, how much you moved and a good deal else. Read it as background rather than as a clock counting down to something happening in you.
Ask the coach, carefully
What the AI coach will and will not do
It can talk about what you have logged. It cannot clear you medically, and it is built not to try.
Talk about your own patterns
How your logged fasting sits beside your weight, your sleep and your training over the weeks you have recorded.
Assess your health or clear you
It does not diagnose, does not decide a schedule is medically suitable for you, and hands anything clinical to a clinician.
Help you go further than is sensible
It is built to refuse to design or refine an extreme-restriction plan or a multi-day fast for weight loss, whatever it is asked.
Keep reading
What to look at next
16:8 versus 18:6 versus 20:4 versus OMAD What actually differs between the windows.
Food logging What you eat in the window, logged free.
Widgets and Live Activities The timer on your lock screen, and on Android in your notifications.
Health sources The register behind every health claim Loopa makes.
FAQ
Questions about fasting in Loopa
The practical ones, and the ones worth asking first.
Which schedules can I track?
16:8, 18:6, 20:4 and OMAD as presets, or a custom window of your own. OMAD in Loopa is a 23-hour fast. Longer windows are available as an extended fast, with a health notice first. 5:2 is a weekly pattern rather than a daily window and Loopa does not have a preset for it.
Is fasting tracking free?
No, it is part of Loopa Premium. Food logging, water, weight and vitals are free, so you can track everything around a fasting window on Loopa Basic.
Does Loopa decide whether fasting is right for me?
No, and it is careful not to. It can show you patterns in what you have logged, but it does not assess your health, clear you to fast or tell you a schedule is suitable for you. That is a conversation with a clinician, and the app says so rather than filling the gap itself.
What happens before a long fast?
Anything of 48 hours or more shows a health notice you have to acknowledge before the timer will start. It names the real risks, says to keep fluid and electrolytes up, says to stop and seek care if you feel dizzy or faint or your heart races, and says extended fasting should only happen under a clinician’s care. It cites the National Institute on Aging and it is not skippable.
Is there a streak?
There is, and it counts consistency rather than length. A day counts when you were in a fast that met its own target, so a long attempt that fell short of what you set counts for nothing and an ordinary 16:8 day counts fully. There is one day of grace. Loopa does not reward you for fasting longer.
Does Loopa show what is happening in my body hour by hour?
The app shows a general sequence with rough hours attached. Treat it as broad physiology rather than a clock: the timings vary a great deal between people and with what you last ate, and precise thresholds at fixed hours are not something a timer can know about you.
Is there a lock-screen timer?
On iPhone, yes: the fast runs as a Live Activity on the lock screen and in the Dynamic Island. On Android it is an ongoing notification with a running clock. Widgets and Live Activities.
What happens to my calorie target while I am fasting?
On a fast of 24 hours or more, Loopa sets the day’s intake target to zero, because a calorie goal during a full-day fast is a number nobody should be trying to hit. Shorter windows do not change your target.
Track the window you already keep
Fasting is part of Loopa Premium. The food, water, weight and vitals around it are free, and fasting is optional in every sense.
Get Loopa free Which window suits you
Not appropriate for everyone. Talk to a doctor first if any of the cautions above apply to you.