Zeph: Weather Coach
Know when to train outdoors
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Stop guessing. Every morning, get a 1–10 training score and your best hour to run, ride, or ride hard. Built for athletes who care about performance, not pixels.
Zeph tells you one thing: when to train.
Not a 10-day forecast. Not a data dashboard. One score, out of 10, every day. Your best window to get outside and move.
Most weather apps give you temperature, humidity, wind speed, UV index, and dew point — and leave you to figure out what it all means for your workout. Zeph does the thinking for you. It reads the conditions, weighs what matters for outdoor training, and surfaces a single score with a clear recommendation. Open the app, see your number, and know whether to lace up now or wait.
WHAT ZEPH DOES
Every morning, Zeph analyzes the hourly forecast for your location and calculates a training score from 1 to 10. It identifies your optimal training window — the specific hours where conditions are best — and tells you exactly when to head out. Tap through to see how the score shifts across the day, or check the week ahead to plan your harder sessions around the best conditions.
BUILT FOR OUTDOOR ATHLETES
Whether you run, ride, hike, or train in any other way outdoors, Zeph adapts to your activity. Set your preferred sport and your training hours, and Zeph tailors its recommendations to your schedule. Switch activities on the fly with a long press — your score and window update instantly.
ALWAYS WHERE YOU NEED IT
Zeph lives on your home screen and lock screen with widgets that show your score and best window at a glance. Enable Early Window Alerts and Zeph will notify you the night before when tomorrow's best conditions start earlier than expected — so you never miss a great morning.
YOUR PRIVACY, RESPECTED
No account. No login. No data sent to servers. Your location is used only to pull your local forecast. Everything stays on your device.
ZEPH PREMIUM
Full access to Zeph requires a subscription. Try it free for 7 days, then $4.99 per month or $39.99 per year. Cancel anytime.
Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Manage or cancel your subscription in your Apple ID account settings.
Privacy Policy: https://getzeph.app/privacy
Terms of Use: https://getzeph.app/terms
The developer, Entropy Logic LLC, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Location
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Entropy Logic LLC
- Size
- 7.3 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Annual $39.99
- Monthly $4.99
- Copyright
- © Entropy Logic LLC