Zero Fasting App Alternative: What to Compare Before Switching

Interactive tool

Times use your device’s local time zone.

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Quick start

A pattern such as 16:8 means 16 hours without calories followed by an 8-hour window in which you eat. Start the clock after your last calorie-containing food or drink.

Show the key terms

Fasting window: The hours when you do not consume calories.
Eating window: The hours available for meals.
16:8: Fast for 16 hours and eat within the remaining 8 hours.

Useful context

Choose the fasting duration and the time of your last calories. The calculator finds when the next eating window begins.

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01

The switching checklist

Export and history access matter more after months of use. Before switching, verify what can be edited, how data is backed up, whether an account is required, and which features are paywalled.

Past-fast editing
Custom schedules
History export
Notifications and widgets
Account and privacy model
Recurring and lifetime price

02

Where BurnHour is heading

The BurnHour web timer is free and requires no account. The native app is coming soon; planned features are clearly separated from functionality available today.

FAQ

Questions, answered plainly

Can Zero edit completed fasts?+

Zero’s current product page says users can edit start and end times after a fast and add notes.

Is BurnHour available in the App Store?+

Not yet. The web calculators are available now, and native apps are marked coming soon.

Do I need an account to use the calculator?+

No. The web calculators are free and run in your browser without an account.

Sources and further reading

Sources behind the formulas and explanations.

Zero product overview