Night Fast
01
Start after your last meal
Even at 2:00. Forgot to tap? Use 1h / 4h / 8h ago so the ring catches up.
Night Fast
Fast on your clock, not theirs.
Built for night shifts. Open the app, see time left, tap End when you eat. No account. Your log stays on the phone.
Free timer. 16:8, 18:6, and OMAD. English and Vietnamese in the app.
16:8 · 18:6 · OMAD Night-shift windows On this phone only Not a medical device
Daily loop
Start. Glance. Eat.
02
Open 2–6 times a day
The ring is time left plus when you may eat. You do not need to keep the app open.
03
Complete when the window opens
That grows consecutive days. Stop early if you eat — logged honestly, no streak.
Why it exists
Office-hour fasting apps assume lunch at noon.
Night clock
Eat 23:30–07:30 if that is your shift
Presets follow local time, not a 9–5 day. 16:8, 18:6, and OMAD are free. Custom windows are Pro.
Private
No Night Fast account
Sessions, optional weight, height, and age stay in on-device storage. This version does not run a Night Fast server for that data.
Honest
Ads must not use health data
The free tier may show ads. They are not targeted from weight, BMI, or fasting history. Pro is an Apple In-App Purchase when it ships.
Health & Fitness
A schedule, not a diagnosis
BMI is a rough marker. The app does not measure glucose or blood pressure. Ask a clinician before changing how you eat.
Medical note
Night Fast is a timer and short educational notes. It is not a medical device and does not diagnose or treat disease. Do not use long fasts as a default if you are pregnant, breastfeeding, underweight, or have a medical condition — talk to a clinician.