StepFast: Walk & Fasting Timer
Steps, weight & eating window
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Walk your number, close the kitchen on time. Steps, weigh-ins and fasting in one calm app. Adapted for iPhone Duo.
StepFast brings two simple habits, your daily steps and a fasting window, together in one clear daily view.
Most step counters tell you how far you walked. StepFast shows how today's steps compare with a target estimated from your own data, and what you could do next.
Adapted for iPhone Duo: fills the inner screen, keeps the Today dial centered, and uses a two-column Premium layout.
HOW IT WORKS
StepFast estimates your step targets from the details you enter, such as your height, weight, age and sex. Your day then appears on one dial with four ranges around today's goal: below today's goal, almost at today's goal, at today's goal, and above today's goal. The cutoffs move with your personal target.
These ranges are estimates, not promises. Results vary.
FOUR SIMPLE TABS
• Today: your steps, zone and fasting status at a glance
• Calculator: drag to any step count and see where it would place your day
• Fast: your fasting timer and history
• Trends: your weight, steps and fasting hours over time
WALK YOUR NUMBER
• Step counter and pedometer that reads your steps from Apple Health, so iPhone and Apple Watch steps are included
• Cycling, swimming, strength training, yoga and rowing count too: minutes are converted to steps, read from Apple Health or added by hand
• Step calculator: see how many more minutes of walking would bring a short day into a different zone
• Your day can end when you do: pick the hour your steps stop counting
INTERMITTENT FASTING, MADE CALM
• Fasting timer with 12:12, 14:10, 16:8 and 18:6 plans
• "Kitchen is open" and "Kitchen is closed" instead of a stopwatch
• The timer starts when you tap Start Fasting, and you can adjust the start time afterwards, up to 24 hours back
• A 7-day fasting history you can add to or edit
• StepFast never suggests a fast longer than 18 hours
WEIGH IN WITHOUT THE DRAMA
• Log your weight each day
• Missed a weigh-in? Add it for today or any of the previous 7 days
• See your BMI and estimated resting burn (BMR), calculated with the Mifflin-St Jeor equation
BUILT FOR REAL LIFE
• Choose your goal, lose or maintain, and set a target weight
• Pounds or kilograms, feet or cm
STEPFAST PREMIUM
• Find your number: Premium learns your daily step number from your weigh-ins. You get an early read after about a week of weigh-ins, and a steadier number after about two weeks
• Trends for weight, steps and fasting hours over 7, 14, 30 or 90 days
• Today's different: on a day that won't go as usual, shorten today's fast and get an optional step nudge
• Regain alert: a heads-up when your weight trend starts to move up
PRIVATE BY DESIGN
No account. No sign-up. No ads. StepFast reads steps, weight and workouts from Apple Health and never writes data back. Your data stays on your iPhone, and StepFast has no server that collects it.
SAFETY FIRST
StepFast is for adults 18 and over. It asks a few health questions before suggesting any fasting, and turns fasting off where it may not be appropriate, such as during pregnancy. If your BMI gets too low or you're losing weight too fast, StepFast pauses fasting and tells you on Today. If your BMI falls under 18.5, your goal switches from lose to maintain.
StepFast is a general wellness app, not a medical device, and it does not provide medical advice. Its numbers are estimates and are not intended to diagnose, treat, cure or prevent any condition. Talk to your doctor before starting a fasting plan.
SUBSCRIPTION
StepFast Premium is an optional auto-renewing subscription: weekly, every 3 months or yearly.
Local prices are shown before you buy. No free trial. Payment is charged to your Apple ID at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel anytime in Account Settings.
Terms of Use: https://www.qyaitech.com/stepfast-terms
Privacy Policy: https://www.qyaitech.com/stepfast-privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
This update adds full support for iPhone Duo (outer and inner displays) and expands in-app languages:
• English (US, Australia, Canada, UK)
• Simplified Chinese & Traditional Chinese
• Japanese, Korean
• German, French, Spanish, Portuguese (Brazil)
We've optimized layouts for iPhone Duo so key screens stay readable and usable on both displays.
The developer, QYAI TECH LIMITED, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- QYAI TECH LIMITED
- Size
- 7.5 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 8 more
- English, French, German, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
18+
- 18+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Weekly $4.99
- Annual $39.99
- Quarterly $19.99
- Copyright
- © 2026 QYAI TECH LIMITED