Crisp Widget for Fasting
Support

Touch and hold an empty spot on your home screen, choose "Widgets", pick Crisp Widget for Fasting, and drag it to where you want it. You can also open the app and use "Add to Home Screen" on the settings screen (this does not work with some home screen apps).
Once it is placed, touch and hold the widget to resize it.

Fasting and eating switch when you tap the button at the top right (for example, with 16:8: start a fast with the button → goal of 16 hours → start eating with the button → goal of 8 hours → start a fast with the button …). It does not switch automatically after the goal time; it keeps counting the extra time.

• Mark at the top left: a fork and spoon = eating window; a prohibition sign (a circle with a slash) only = fasting. Under "State display" in DISPLAY, choose icon / text / icon + text
• Large number: time left until your goal (e.g. 2:10 left). After the goal, it counts only the extra time, like "+0:25 over". In DISPLAY you can also show "Elapsed" (total since you started) or "%" (progress toward the goal; after the goal it goes past 100%, like 112%)
• The line below: before the goal, "Eat from 20:00" while fasting and "Finish eating by 20:00" while eating (the goal time; the day of the week is added if it is not today). After the goal, "Goal reached · Tap to start eating" / "Goal reached · Tap to start fasting"
• Progress bar: progress toward the goal (it stays full after the goal)
• When stopped, it shows a faint mark and the plan name (e.g. 16:8) with "Tap to start fasting". Press the button at the top right to start a fast now

Under DISPLAY → "Number font" on the settings screen, choose one of two options.

• Selected font (default): Shows "hours:minutes" (no seconds) and updates every minute. To update exactly on every minute on Android 12 and later, allow this app's "Alarms & reminders" (open it from "Time accuracy" on the settings screen). Without it, the display can be up to about a minute late until you turn on the screen.
• System font (accurate to the second): Android's standard component counts every second, so it is always accurate to the second. The font is the system font. After the goal, it counts up with a "+".

In both cases the start time is recorded with your phone's clock, so it recalculates automatically if you change the time or time zone.
The switch at the moment you reach the goal (left → over) happens exactly on time even with the screen off if "Alarms & reminders" is allowed. Without it, it can be a few minutes late, but the display is correct when you turn on the screen.

When "Alarms & reminders" is allowed, the app uses Android's "alarm" mechanism to update exactly on time at the goal time and every minute for the "Selected font" numbers. Because of this, the icon may appear while you are fasting or eating. No alarm will actually ring. Tap the icon to open the app.
It does not appear while stopped. If it bothers you, you can turn off the "Alarms & reminders" permission (the goal display and notifications may then be a few minutes late).

The % and progress bar redraw the widget every time they advance 1% (as often as every minute for short fasts).
To save battery, they are not redrawn while the screen is off; they update all at once when you turn on the screen. On Android 12 and later, this can be up to about 10 minutes late.
If you want to see the exact time, set the large number in DISPLAY to "Time left" or "Elapsed" (updated to the second with "System font", or every minute with "Selected font").

Turn on "Notify when the goal is reached" in NOTIFY to be notified when a fast reaches its goal ("Fasting goal reached" You have reached 16 hours. Tap the button when you start eating.) and when an eating window reaches its goal ("Eating window goal reached" You have reached your 8-hour eating window. Tap the button when you start fasting.). The notification does not switch anything automatically. You are not notified when you switch yourself with the button.
If "Alarms & reminders" is allowed, notifications arrive exactly on time. Without it, they can be a few minutes late (up to about 10 minutes on Android 12 and later).
Battery-saving features on some phones such as Xiaomi and OPPO can delay them further or stop them. Setting this app to "Don't optimize" in "Battery optimization" may help.

• Check that "Notify when the goal is reached" in NOTIFY is on.
• On Android 13 and later, notification permission is required. If you did not allow it, turn it on in Settings → Apps → Crisp Widget for Fasting → Notifications.
• You are notified only once per fast or eating window. You are not notified if you notice more than 30 minutes later (for example because your phone was off), or if you fixed the start time and the goal had already passed.

Check that DISPLAY → "Number font" is not set to "System font (accurate to the second)". With "Selected font", the numbers also use the font you chose (no seconds).
While stopped, the plan (e.g. 16:8) is shown with either font.

Since the update on October 7, 2026, fasting and eating do not switch automatically. After the goal time, the widget shows the extra time, like "+0:25 over", together with "Goal reached · Tap to start eating". When you start eating (or start fasting), tap the button at the top right twice within 3 seconds.

• A fast is recorded from when you started fasting until you tap "Start eating" (including time beyond the goal). If it is at least the goal time, it counts as "achieved"
• Eating windows are not recorded
• If you updated from an earlier version (where it switched automatically), the fast or eating window in progress at the time of the update simply continues. If the scheduled time had already passed, that time is shown as extra time

Fix it with "Edit" under NOW on the settings screen. The current fast (or eating window) appears as a black band on a horizontal timeline; drag the handles at either end left or right (in 1-minute steps).

• Left handle: when the current fast (or eating window) started. It cannot be in the future or overlap the previous fast
• Right handle: "now" at first. If you started eating (or fasting) but forgot to press the button, drag the right handle left to the time you actually switched. It is recorded as if you switched at that time
• Records of finished fasts can be fixed the same way in HISTORY: long-press the day's ring and tap [Edit]

Under STYLE → "Progress bar" on the settings screen, choose the colors of the filled part and the track separately (opacity can be set too; at 0% it is invisible). Turn off "Show progress bar" in DISPLAY to hide the bar entirely.
If you updated from an earlier version, the previous look (text color / 25% of the text color) is kept. Changing the text color after that does not change the bar color automatically.

To prevent accidental switches, "Start eating" while fasting and "Start fasting" while eating require two taps within 3 seconds. After the first tap, the icon becomes a check mark and the text changes to "Tap again to start eating" / "Tap again to start fasting". Tap again within 3 seconds. After 3 seconds it goes back. Starting while stopped takes a single tap.
You can change the button colors under STYLE on the settings screen.

No. Because it may harm your health, this app does not measure fasts longer than 24 hours. CUSTOM can be set to 24 hours at most.

• When a fast reaches 24 hours, elapsed time, extra time and % stop there, and the widget shows "24 hours reached · Time to eat" (you are notified once if notifications are on). It does not switch automatically, so tap "Start eating" with the button when you start eating
• The length of a recorded fast is also 24 hours at most (even if you tap "Start eating" later, the record is 24 hours)
• Fasts longer than 24 hours recorded in earlier versions are also shown as 24 hours

The eating window goal is the length that makes 24 hours together with the fast (e.g. 16 hours → 8-hour eating window, OMAD (23 hours) → 1-hour eating window, 24 hours → 24-hour eating window).

Only on this phone. No account or sign-in is needed, and the app does not communicate at all.
Deleting the app also deletes the records. You can keep them as files with CSV export under EXPORT (paid version) (fasting history and weight are separate files).
If Google backup is turned on in your phone's settings, Android may also back up your records to your Google account and carry them over when you change phones (the developer cannot see the content).

HISTORY shows each day as a ring (a 24-hour pie chart), laid out in a calendar one month at a time (swipe up or down for other months). The top is 0:00, and one clockwise turn is that day's 24 hours; the black part is the time you were fasting (a fast in progress is shown in light black and extends to now).

• A fast that crosses midnight is split into arcs on each day's ring
• The number in the center of a ring is the total length of the fasts that "ended" that day (a fast that crossed midnight counts with its full length). Example: a fast from 16:00 on 10/1 to 8:00 on 10/2 shows only an arc from 16:00 to 24:00 on the 10/1 ring (no number), and an arc from 0:00 to 8:00 with "16:00" on the 10/2 ring. A fast in progress is not counted until it ends
• Tap a ring to briefly see the total and the start–end of fasts that ended that day. Long-press to fix the start or end of that day's records, or delete them

Log your weight in WEIGHT and see it on a graph (the free version can log too and shows the last 7 days). Choose a period of 7 days, 30 days, 90 days, 1 year or all time (30 days and longer require the paid version), and tap or trace the graph to see the value for a day.

• Units are kg / lb (switch in the logging dialog; your choice is remembered). Log as many times a day as you like; old entries are never deleted automatically
• Tap a date on the graph to fix or add that day's entry. Delete from the edit screen
• Only the number and the change from the previous entry are shown. No target weight, BMI or rating is shown, and there are no reminders to log
• Export to CSV from "Export weight (CSV)" under EXPORT (paid version. Columns: time, weight_kg, weight_lb)

• Free: the fasting and eating timer (switched with the button), widgets, notifications and all design settings. Fasting history and the weight graph can be viewed for the last 7 days (including today)
• Paid version (a single in-app purchase, not a subscription): the full fasting history (up to 800 days), CSV export, longer periods for the weight graph (30 days, 90 days, 1 year, all time), and plans by day of the week (Weekday Schedule under PLAN)
• Even in the free version, your fasting and weight records stay on your device (entries older than 7 days are not deleted). When you upgrade to the paid version, all your earlier records appear as they are

No. This app is a tool for recording and managing the timing of your own meals (fasting and eating windows). It does not recommend any particular diet or health method, and it does not provide medical advice, diagnosis or treatment.
If you are pregnant or breastfeeding, under 18, have a medical condition or take medication, or have a history of eating disorders, consult a doctor before use. If you feel unwell, stop fasting immediately.