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App Store Apps > Health & Fitness > Runfa.st
Runfa.st icon

Runfa.st

by Jan Zarcky · Health & Fitness · Free
On the App Store since March 2026 · Data updated 2026-10-19
App Store

Runfa.st is made and published by Jan Zarcky. AppBrain is an independent app data site and isn't affiliated with Jan Zarcky. The app name, icon, screenshots and description belong to Jan Zarcky and are shown as published on the App Store.

AppBrain's verdict

Last updated
September 28, 2026
Size
19.7 MB

User feedback

Ratings and reviews on the App Store

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Store listing

By Jan Zarcky, from the App Store
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Screenshots by Jan Zarcky, from the the App Store listing
Description by Jan Zarcky Written by the developer, not by AppBrain. Click to read.
Runfa.st is the personal AI running coach that actually understands your data.

Stop relying on generic, static training plans that don't adapt to your fitness level. Runfa.st analyzes your real training history to build dynamic weekly plans and give you actionable, specific advice tailored to your exact goals.

Whether you’re chasing your first 5K, aiming for a sub-1:30 half marathon, or hunting down a marathon PB, Runfa.st replaces the guesswork with data-driven guidance so you can improve with purpose.

Key Features:

• Dynamic Weekly Plans: Get a tailored day-by-day schedule featuring easy runs, intervals, tempo efforts, and long runs—each with the exact target paces you need to hit your goal.
• Hyper-Personalized AI Coach: Chat with an AI that knows your actual running stats. Ask how to adjust your pace, what you're missing in your training, or why a run felt hard—and get highly specific, data-backed answers.
• Seamless Apple Health Sync: Instantly import your Apple Fitness workouts (including Strava runs synced to Apple Health) so your coach and plans are always up to date.
• Race Targeting: Set your event date, distance, and goal time. See exactly how many days are left and track your average paces to ensure you're on track for race day.
• Target-Specific Threads: Training for multiple races? Keep your coaching chats organized by specific targets so the context never gets lost.
• Minimalist, Distraction-Free Design: A beautifully bold, dark-mode interface built to keep you focused on what matters—your training, your progress, and your next run.

Runfa.st requires an active subscription to access all features including AI coaching, personalised weekly training plans, race target tracking, run imports, and stats analysis. Subscription plans are available on a weekly or monthly basis. Payment is charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless cancelled at least 24 hours before the end of the current period. AI coaching includes a monthly usage allowance that resets automatically. No additional purchases are available or required.

Terms of Use: https://www.tapable.app/runfast/terms
Privacy Policy: https://www.tapable.app/runfast/privacy
Official page on the App Store

Safety and technology

Found in the app by AppBrain
Price
Free
App size
19.7 MB
Content rating
Low

Technologies used by Runfa.st

Releases

Updates seen on the App Store
Version
1.0.39
Launched
March 2026

No changelog data

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Rankings

App Store top charts

App Store Rankings for Runfa.st

This app is not ranked

About the app and developer

About Runfa.st

Runfa.st is a health & fitness app developed by Jan Zarcky.

What is the rating of Runfa.st?

Runfa.st has no ratings yet.

Is Runfa.st free?

Runfa.st is free. The app size is 19.67 MB. The latest version available is 1.0.39. The last update was on September 28, 2026.

What are the requirements for Runfa.st?

The app has a content rating of Low Maturity. The app has been available on the App Store since March 2026.

Developer information for Jan Zarcky

Jan Zarcky

Address:

Frequently asked questions about Runfa.st

Is Runfa.st free?

Yes. Runfa.st is free on the App Store.

Is Runfa.st still available?

Yes. Runfa.st is on the App Store, and the last update we saw was on September 28, 2026.

How large is Runfa.st?

Runfa.st is 19.67 MB.

Is Runfa.st suitable for children?

App Store gives Runfa.st a low maturity rating, so it is meant for older children and up.

Who made Runfa.st?

Runfa.st was developed by Jan Zarcky. It is listed in the health & fitness category on the App Store.

What are the best alternatives to Runfa.st?

People looking at Runfa.st also look at these health & fitness apps: Mufo, NutriAi: Smart Calorie Counter, ACS CARES, San Antonio Marathon, Quit Vaping & Smoking - NoPuff.

Share Runfa.st

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