Fasting countdown

How to use this countdown

Enter the time your fast is scheduled to end. If you're doing a 16:8 fast that started at 8 PM last night, your fast ends at 12 PM today - enter that. The countdown updates live, to the second.

If you don't know your end time, use the end of fasting calculator to find it from your start time and duration, then come back here.

Staying the course during a fast

Fasting becomes easier with concrete time awareness. Hunger comes in waves - knowing that you're 83% through your fast and have only 2 hours 40 minutes left is far more manageable than vaguely knowing "a few more hours."

• Drink water - thirst and hunger feel similar; staying hydrated reduces false hunger signals
• Stay busy - boredom is one of the biggest fasting challenges, not actual hunger
• Black coffee or tea - both are generally considered fast-compatible and suppress appetite
• Check the countdown, not the fridge - knowing the exact time remaining is more useful than willpower alone

Is fasting right for you?

Fasting is not suitable for everyone. If you are pregnant or breastfeeding, under 18, have diabetes or another medical condition, have had an eating disorder, or take regular medication, talk to a doctor before you fast. Mayo Clinic has an overview of intermittent fasting. This calculator only works out times; it does not give medical advice.

Take it to your Lock Screen

Download Left and add your fast end time as a countdown. Pin it to your Lock Screen - every time you pick up your phone (which you will, because you're bored and hungry), you'll see exactly how much time is left without opening any app.

Left also has a fasting timer with a Live Activity. Fasting is part of Left Premium. For a free countdown to your fast's end, see the countdown widget.

Put this countdown on your Home Screen