Most people think their window is 10 hours. Research says it's over 15 — costing you sleep, energy, and metabolic health every day. One tap per meal reveals your real number.
Free to use · No credit card · 2 sec to log
How do you feel?
Join people already tracking their eating windows
The problem
Yesterday's meal timing? Gone. That amazing Tuesday when you felt unstoppable? You can't remember what you did differently. The pattern that's been wrecking your sleep for months? Still invisible.
Fasting timers count down hours but never ask how you feel. You hit your window and still feel terrible — and have no idea why.
Calorie counters turn every meal into a math problem. You know what you ate down to the gram but not whether it's working.
OutLast connects the two things that actually matter: when you eat and how you feel. That's the data that changes behavior.
How it works
One tap. Auto-timestamps your meal. Done in 2 seconds. Optionally add what you ate.
Eating window, meal gaps, energy trends — color-coded so you know instantly if you're in the sweet spot.
See which days you felt great and what you did differently. Your body has patterns. Now you can see them.
Daily scoring
Log your meals. OutLast scores your protocol compliance in real time — window, timing, energy, streaks — so you always know if you're on track.
Window: 7.5h (target: 8h). 3 meals. Fast: ~16.5h.
Live demo — this is what your daily score looks like
Popular protocols
8h window
16 hours fasting, 8 hours eating. The go-to intermittent fasting approach.
Eat early, stop early
Align meals with your body clock. Eat after waking, finish 3h before bed.
6h window
A tighter window for more fasting time. The sweet spot between 16:8 and OMAD.
90min wake delay, 8-10h window, stop 3h before bed
All nutrition in a single meal. Maximum fasting simplicity.
10-12h window with 3-4 evenly spaced protein-rich meals
20h undereating, 4h feast. Light foods during the day.
All food consumed by 11 AM. Ultra-early eating window.
Smart feedback
Stop wondering why some days you feel unstoppable and others you crash by 2pm. See the answer in your own data.
That restless night might be last night's late dinner. See how your meal timing affects your sleep, mornings, and focus.
One glance tells you if you nailed your day. No spreadsheets, no mental math — just a clear signal that you're building the habit.
Your body is different. See what actually works for you — the window, the timing, the meal count that makes you feel your best.
What you get
Most people think their window is shorter than it is. See the truth in seconds and close the gap between intention and reality.
Same foods, different timing, different results. Discover the schedule that gives you steady energy all day.
One look at your week reveals exactly what changed. No more guessing why Tuesday was great and Thursday was a wreck.
Train fasted or fueled — and actually know which works better for your body. Stop leaving gains on the table.
The science
What people say
“I've been doing 16:8 for a year but had no idea my actual window was closer to 13 hours. OutLast showed me on day one. Fixed it, and my morning energy is noticeably better.”
“I log meals in 2 seconds while wrangling two kids. After a week I could see that my 9pm snacking was killing my sleep. Stopped, and I'm sleeping through the night again.”
“I always crashed at 2pm and blamed lunch. Turns out my eating window was 16 hours. Tightened it to 11 and the afternoon crash disappeared.”
You already know who you are
OutLast is for people who take their health seriously enough to measure it.
Questions
Every meal you don't log is a data point you'll never get back.
Start with your next meal. Just one tap. That's the whole commitment.
Log my next mealFree to use · No credit card · Takes 2 seconds