A fasting timer that feels calm, not clinical.
Nestis (NESS-tiss, /ˈnɛstɪs/), Greek for fasting.
Nestis tracks your fast, shows the metabolic phase you're in, and builds streaks you can actually see. No account, no clutter, private backup over iCloud.
Free to download.
iPhone. No account, no sign-up.
One timer, every screen
Track
Start a fast. Watch the phase change.
Pick a schedule, tap start, and Nestis carries you through it. A metabolic phase bar moves from Fed through Fat Burn to Ketosis, so you always know where you are, not just how much time is left.
Choose a typographic, ring, or liquid timer, whichever reads best at a glance.
Choose your schedule
16:8, 18:6, 20:4, or your own.
Five built-in presets cover the common protocols. Set custom hours, including OMAD, when you're ready to go further.
Gentle milestone notifications mark the moments that matter, without nagging.
See your progress
A streak you can see, a trend you can trust.
A six-week heatmap shows your current streak, your best, and every fast behind it. Trends turn a week of fasts into a pattern worth noticing.
On the Lock Screen
Your fast, without opening the app.
A home screen widget and a Live Activity on the Lock Screen and Dynamic Island keep your elapsed time and phase in view, all the time.
What's in it
Simple enough to open and tap start.
Deep enough to see the shape of your fasting over months.
- Typographic, Ring & Liquid timers: pick the display that reads best to you
- 5 schedule presets: 12:12 through 20:4, plus custom hours and OMAD
- Metabolic phase bar: Fed, Early Fast, Glycogen, Fat Burn, Ketosis, Autophagy
- Milestone notifications: gentle nudges as you cross each phase
- Trends: this week free, month and year with Pro
- Streaks: a 6-week heatmap, current, best, and total
- Journal: a note with every fast, mood and reflections
- Five accent colors: Sage, Clay, Gold, Sky, and Lilac
- iCloud backup: your history, backed up automatically, free forever
- Widgets: home screen, Lock Screen, and Live Activity
- Export: JSON, PDF, and CSV, whenever you want your data out
Unlimited journal entries, all timer styles, every accent, and full trend history come with Nestis Pro, available inside the app.
Your data, yours
No account. No sign-up. No servers of ours.
Your fasting history stays yours, backed up privately through your own iCloud account. There's nothing to create, nothing to log into, and no copy of your data sitting on a server we run, because we don't run one.
Nestis is in final testing before its App Store launch. Questions? Write to hello@nestis.app. Common questions are already answered on the support page.