Available on the App Store

The fasting timer that stays out of your way.

Intermittent fasting shouldn't require an account, a subscription, or a tutorial. Start a fast in seconds, glance at your Lock Screen whenever you want, and move on with your day.

Download Steadfasting on the App Store
Free to use · $3.99 lifetime Premium
Free Live Activity & Dynamic Island
No account, no subscription
Data stays on your iPhone
Steadfasting active fast screen showing Digest stage and 15:59:48 remaining
Free
Live Activity
Most apps paywall this. We don't.
3
Fasting Modes
Schedule, Open Fast, Countdown.
$0
Subscription
Ever. Premium is a one-time purchase.
0
Data Collected
Your fasts stay on your device.
What's inside

Built for people who actually fast.

No meal plans you'll ignore. No coaches you didn't ask for. No social feed. Just a clean, reliable fasting tracker.

Start a Fast screen showing Schedule, Open Fast, and Countdown modes with 12:12, 14:10, 16:8, 18:6, 20:4, 24:0 fasting window options
Core Feature

Three ways to fast, zero complexity.

Most fasting apps pick a side: rigid presets or free-form stopwatch. Steadfasting gives you both, plus a countdown mode for people who schedule around meals instead of after them.

  • Schedule — Pick a window (12:12 through 24:0, or set your own) and get notified when it's done.
  • Open Fast — Start with no end time. End when you're ready. No pressure.
  • Countdown — Set a target end time. Perfect when your eating window starts at 8pm.
Active fast on Steadfasting showing elapsed time, progress ring, fast stage indicator, and End Fast button
Why it matters

Your fast, always visible. Free.

The feature every fasting app puts behind a paywall — real-time progress on your Lock Screen and Dynamic Island — is free in Steadfasting.

Start a fast, put your phone down, and check your progress without unlocking. No widget configuration, no Premium upgrade required.

Fasting History screen showing Longest fast (2d), Average (18h 19m), Top Mode (Countdown), and recent fasts grouped by week
History

Every fast, automatically logged.

No manual entry. No cluttered charts. Just a clean record of what you've actually done — longest fast, average duration, your most-used mode.

Grouped by week and month so you can spot patterns without hunting for them.

Hydration tracker in Steadfasting showing water intake counter at 0 of 3
HydrationPremium

Stay hydrated without a second app.

Water intake matters most during a fast, and Steadfasting puts it right next to your timer. No separate hydration app. No notifications guilt-tripping you every two hours.

Set a daily target, tap to log a drink, done.

Weight tracking screen showing 166.8 lb with trend graph, summary stats for average, lowest, and highest weight
Weight trackingPremium

See the bigger picture.

Log your weight alongside your fasts and watch the trend line tell the story. Pounds or kilograms. Summary stats for average, lowest, and highest weight.

No shame metrics. No BMI lectures. Just the numbers you actually want to see.

Steadfasting shown in both light and dark mode, with the Start Fast screen displayed side by side
Looks right, always

Light or dark. Your call.

Steadfasting looks great on a bright kitchen counter at 7am and equally great on your nightstand at 11pm. Follows your iPhone's system setting automatically.

Steadfasting Premium

One purchase. Yours forever.

In a category where $70/year subscriptions are normal, Steadfasting Premium is $3.99. Once. The core app stays free — Premium just adds the extras for people who want more.

$ 3 .99
One-time purchase. No subscription. No renewal.
  • Custom fasting times beyond the presets
  • Weight tracking with trends & history
  • Hydration tracking during your fasting window
  • Fast stages — Digest, Fat Burn, Ketosis, Autophagy
Download Steadfasting on the App Store

How this compares

Most fasting apps run $50–$80 per year. That's $250–$400 over five years for a timer. Here's what $3.99 lifetime buys you versus what the category expects.

  Typical app Steadfasting
Annual cost $50–80/yr $0
One-time unlock — $3.99
Account required Usually Never
Live Activity free Rarely Yes
Tips & Tricks

Get more out of Steadfasting.

A few things that make the app — and your fasting practice — work better.

01

Start with Schedule, graduate to Open Fast.

If you're new to intermittent fasting, pick 16:8 in Schedule mode so the app tells you when you're done. Once you've got a rhythm, switch to Open Fast — most experienced fasters end up there anyway.

02

Use Countdown mode for dinner-first eaters.

If your eating window ends at 8pm every day, Countdown is the right mode. Set the target and it counts down to your last bite instead of up from your first fast.

03

Put the Live Activity to work.

Start your fast, then close the app. Your progress stays on the Lock Screen and Dynamic Island. Opening the app constantly to check a timer is the fastest way to make fasting feel harder than it is.

04

Hydration beats hunger.

Most "I'm starving" moments during a fast are actually thirst. If you have Premium, log water alongside your fast. If you don't, at least keep a bottle nearby — your first fast will tell you why.

05

The fast stages are directional, not clinical.

Digest, Fat Burn, Ketosis, and Autophagy give you a rough sense of where you are — individual metabolism varies. They're motivation, not a lab report.

06

Review your history monthly, not daily.

Checking your streak every day creates pressure that makes people quit. Checking monthly shows you the trend — which is the only part that actually matters.

FAQ

Questions, answered.

Still need help? Email support@seampli.app and we'll get back to you.

Is Steadfasting free?
Yes. The core fasting timer, Live Activity, Dynamic Island tracking, all three fasting modes, and full fasting history are free. Steadfasting Premium is an optional one-time $3.99 purchase that unlocks custom times, weight tracking, hydration tracking, and fast stages. There are no subscriptions.
Do I need an account?
No. Steadfasting works without any account, email, or sign-up. Open the app and start fasting. Your data stays on your iPhone.
What data does Steadfasting collect?
None. Steadfasting does not collect, transmit, or share any data from you. Your fasts, weight entries, and hydration logs stay on your device. Apple's App Store listing confirms this under "Data Not Collected." Read the full privacy policy.
What fasting modes does Steadfasting support?
Three: Schedule (pick a preset like 16:8, 18:6, 20:4, 24:0, or a custom window), Open Fast (no end time — stop when you're ready), and Countdown (set a target end time and count down to it).
Does Steadfasting support Live Activity and Dynamic Island?
Yes, and it's free. Most fasting apps put this behind a paywall. Steadfasting shows your progress on the Lock Screen and Dynamic Island at no cost, so you can glance at your timer without opening the app.
What does Steadfasting Premium include?
A one-time $3.99 purchase unlocks: custom fasting times beyond the presets, weight tracking with trends and history, hydration tracking alongside your fasts, and the fast stages view (Digest, Fat Burn, Ketosis, Autophagy). No subscriptions — pay once, own it forever.
Is there a subscription?
No. The app is free to use, and Premium is a single one-time purchase of $3.99. No auto-renewing subscriptions, no trials that convert, no recurring charges.
Does Steadfasting work on Apple Watch?
Not currently — Steadfasting is iPhone-only. Live Activity on the Lock Screen covers many of the use cases people want a watch app for.
What iPhone do I need?
iOS 17.6 or later. Lock Screen Live Activity works on any supported iPhone. Dynamic Island features require iPhone 14 Pro, 15 Pro, or newer Pro models.
Can I edit past fasts?
Yes — editing past fasts is a Steadfasting Premium feature. Your fasting history is automatically logged when you end a fast, and Premium users can edit the start time, end time, or details of any past entry.
Will my data sync between devices?
Steadfasting stores your data locally on your iPhone — there's no cloud account and no cross-device sync. This is intentional: no account means no data collection, but also no automatic syncing between devices.
Steadfasting app icon

Start your next fast in seconds.

Free download. No account. No subscription.

Download Steadfasting on the App Store