Sub20
Health & Fitness
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Sub20 is a structured 5K training system built for one goal: helping you run a sub-20 minute 5K.
Whether you're starting from 35 minutes or already chasing the 20-minute barrier, Sub20 gives you a precise, progressive training plan across 6 levels - each one designed to push your fitness forward without overtraining.
How It Works:
Sub20 uses a progressive system that adapts to your current ability. Enter your current 5K time and the app places you at the right level. From there, every session is laid out for you - what to run, at what effort, and why.
Every 4 weeks, a Progress Test Week calibrates your training paces automatically. Run your best honest 5K, and Sub20 adjusts your speeds to match your improving fitness.
6 Progressive Levels
Level 1 — Foundation (30:00+)
Build the habit. Easy running, strides, and light fartlek to develop consistency.
Level 2 — Aerobic Build (27:00–30:00)
Introduce tempo runs and intervals. Build pacing control and aerobic strength.
Level 3 — Threshold Development (25:00–27:00)
Extend tempo work and sharpen interval quality. Prepare for sustained effort.
Level 4 — 5K Conversion (23:00–25:00)
Race-specific training. High-quality intervals and threshold work.
Level 5 — Race Specific (21:00–23:00)
Push your limits. Demanding sessions targeting sub-21 fitness.
Level 6 — Sub-20 Peak (≤21:00)
The final phase. Everything focused on breaking 20 minutes.
Features
• GPS run tracking with pace zones
• Strava export - every run logged automatically
• Benchmark tests with 3-attempt averaging
• Progress Test Weeks every 4 weeks
• Training pace adjustment based on your results
• Phase locking - structured retry system if benchmarks are missed
• Injury pause mode
• Optional Day 5 recovery run
Intelligent Benchmark System
At the end of every level, a 3-attempt benchmark test determines whether you progress, or which phases to repeat. No guesswork. No arbitrary progression. Your results decide.
For Serious Runners
Sub20 is not a casual running app. It's a structured coaching system for runners who want a specific, measurable goal with a clear path to get there.
Sub20. One goal. Six levels. No shortcuts.
Sub20 offers a 7-day free trial, followed by a £19.99/month auto-renewing subscription. Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel your subscription anytime in your Apple ID account settings.
Terms of Use: https://sub20.app/terms
Privacy Policy: https://sub20.app/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improved GPS tracking accuracy and reliability during runs, including better tracking when your screen is locked.
The developer, Chris Edgar, 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 Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Contact Info
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
- Chris Edgar
- Size
- 8.6 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Location
- This app may use your location even when it isn’t open, which can decrease device battery life.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Sub20 Monthly $24.99
- Copyright
- © 2026 Chris Edgar