Intermittent Fasting Timer
Track a 16:8, 18:6, 20:4, or OMAD fasting window without an account
Intermittent fasting refers to eating-window protocols rather than a specific diet — 16:8 (eat within an 8-hour window, fast the other 16), 18:6, 20:4, and OMAD (one meal a day) are the most commonly followed patterns. A fasting timer's job is simple: mark when a fasting window starts, show progress toward the chosen protocol's goal, and mark when it ends — nothing more. Fastura does exactly that, with all five common protocols built in and no account required to use it.
This is general information about how these protocols are defined, not medical advice — anyone considering intermittent fasting, especially with an existing health condition, medication schedule, or history of disordered eating, should talk to a doctor first.
The app
How it compares to other tools
Frequently asked questions
What do 16:8, 18:6, and 20:4 mean?
They describe the fasting-to-eating ratio in a 24-hour day. 16:8 means a 16-hour fasting window and an 8-hour eating window; 18:6 is 18 hours fasting and 6 eating; 20:4 is a narrower 4-hour eating window. OMAD (One Meal A Day) is the most restrictive common variant, with essentially all calories eaten in a single sitting.
Does a fasting app need to connect to a health service to be useful?
No — the core function is just a timer and a progress indicator against a chosen protocol's target duration, which doesn't require any external data. Some apps add optional integrations for logging weight or other health metrics, but the timing itself is self-contained.
Is intermittent fasting safe for everyone?
Fasting protocols are not appropriate for everyone — people who are pregnant or breastfeeding, have a history of disordered eating, have diabetes or take medications that require food, or have other medical conditions should consult a doctor before starting any fasting schedule. This is general information about how the protocols are defined, not a health recommendation.