Kiiro – Understand Your Training
Not sure if you're training too hard — or not hard enough? Most apps show you data. Kiiro explains what it means.
Whether you're building toward a goal or just trying to stay consistent without getting injured, Kiiro tracks your training load, zones, and progress — and tells you what to do about it.
AM I TRAINING TOO HARD?
See your training load build over time — recent effort vs. long-term fitness. Know when to push and when to rest. No sports science degree required.
‣ Acute vs. chronic training load
‣ Weekly and monthly trends
‣ Clear warnings before you overdo it
AM I ACTUALLY IMPROVING?
Compare every run on the same route. See your progress in pace, heart rate, and effort — proof that your training is working.
‣ Automatic route matching
‣ Personal records highlighted
‣ Visual charts show trends over time
AM I IN THE RIGHT ZONES?
Easy runs should be easy. Hard runs should be hard. Kiiro shows exactly how much time you spend in each zone — and whether it matches your goals.
‣ Aerobic vs. anaerobic breakdown
‣ Zone trends over weeks and months
‣ Spot polarized training gaps
METRICS THAT MATTER
VO2 max trends, resting heart rate, HRV, cadence, ground contact time, detailed splits and maps.
GOALS & HISTORY
Set targets. Track streaks. Review your full training history with trends and summaries.
Syncs automatically with Apple Watch through HealthKit. No manual uploads. No extra hardware.
For runners who want to understand their training — not just track it.
It’s a great opening for me among training app: so useful, very simple in use, everything is intuitively clear. And very motivated feature in app - you can make your training goals, numbers of training in the week, month etc. Highly recommended 👍🏻
You can now edit your workout in Workout Details and see your peak training fitness in the dashboard.
Version 1.5.0
The developer, endurance101 OÜ, 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
Location
Contact Info
User Content
Identifiers
Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Identifiers
Diagnostics
Privacy practices may vary based, for example, on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Provider
endurance101 OU
Size
42.5 MB
Category
Health & Fitness
Compatibility
Requires iOS 18.0 or later.
iPhone Requires iOS 18.0 or later.
Mac Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
