Comparison
Best Training Apps for Amazfit Watches
Your Amazfit collects the data. But which app turns it into real coaching? We compared Zepp Coach, Intervals.icu, TrainingPeaks, Runna, Strava, and STAS — so you can pick the right tool for your running.
First useful action
Use Amazfit data as part of the whole training picture
When Amazfit data reaches Intervals.icu, STAS can help ChatGPT or Claude reason from recent workouts, zones, and trends.
Connect the source of truth
Intervals.icu keeps workouts, calendar, load, zones, and recent history in one place.
Let AI see real context
STAS prepares that data so ChatGPT or Claude can answer from your actual training, not a pasted summary.
Ask for the next decision
Start with a clear analysis or action: recovery check, missed workout, next week, or one session to adjust.
STAS reads only the training data you approve through Intervals.icu. Start with one practical question: current condition, a workout review, or what to change next.
Connect Intervals.icu dataZepp Coach
built-inZepp Coach comes pre-installed on supported Amazfit watches. It offers daily readiness scores, AI-generated training suggestions, and basic periodization (base → build → peak). Good starting point, but limited in depth.
- ✓Built into the watch — no extra setup
- ✓Daily readiness score and recovery advice
- ✓Basic AI training plans with periodization
- ×Doesn't use your actual training history for personalization
- ×Limited analytics — no CTL/ATL/TSB, no zone analysis
- ×Not available on all Amazfit models
Free basic / ~€20/year for advanced AI plans
Intervals.icu
freeThe most powerful free training platform available. Intervals.icu gives you professional-level analytics that platforms like TrainingPeaks charge $120/year for. Direct Amazfit integration through Zepp.
- ✓Completely free — no limits, no trial period
- ✓Deep analytics: CTL/ATL/TSB, HR zones, power curves
- ✓Workout planning with push to T-Rex 3 Pro and Balance 2
- ✓Wellness tracking: HRV, sleep, resting HR trends
- ×Steeper learning curve — many features to discover
- ×No built-in coaching — it's an analytics platform, not a coach
Completely free
How to connect Amazfit to Intervals.icu →TrainingPeaks
paidThe industry standard for coached athletes. TrainingPeaks excels at structured workouts and coach-athlete workflows. Premium features come at a price, but it's what most professional coaches use.
- ✓Structured workouts sync to watch (via Amazfit Active 3 Premium)
- ✓Coach marketplace — find a human coach easily
- ✓Industry standard for triathlon and running coaching
- ×Premium is expensive: ~$120/year for full analytics
- ×Amazfit integration is less direct than with Intervals.icu
Free basic / ~$120/year Premium
Runna
paidA subscription-based app that provides ready-made running plans for specific goals (5K, 10K, half marathon, marathon). Plans sync to your watch, but they're template-based — not personalized to your current fitness.
- ✓Ready-made plans for every race distance
- ✓Workout sync to Amazfit (Active 3 Premium and newer)
- ×Template plans — doesn't adapt to your daily condition
- ×Subscription required for full features
~$15/month or ~$100/year
Strava
freemiumThe world's biggest fitness social network. Great for motivation and community, but limited as a training tool. Basic analytics in free tier, better route planning and analysis in Premium.
- ✓Huge community — social motivation
- ✓Segment leaderboards and route discovery
- ×Not a coaching platform — no training load tracking
- ×Limited analytics without Premium subscription
Free basic / ~$80/year Premium
STAS + ChatGPT
freeA different approach: STAS connects your Intervals.icu data to ChatGPT or Claude. Instead of a closed app with pre-built features, you get a conversation there, with your training data — paces, heart rate, recovery, and goals — already in view.
- ✓ChatGPT or Claude see your full training history and metrics
- ✓Truly personalized — adapts to your condition daily
- ✓Writes structured plans directly to your Intervals.icu calendar
- ✓STAS itself is free to connect
- ×Requires Intervals.icu connection first
- ×If you want the stronger models, ChatGPT or Claude may need a paid plan
STAS free / ChatGPT or Claude separate
Try STAS — connect your data to ChatGPT or ClaudeSide-by-side comparison
| App | Price | Personalization | Analytics | Planning | Watch sync |
|---|---|---|---|---|---|
| Zepp Coach | Free / €20/yr | Basic | Basic | AI plans | Built-in |
| Intervals.icu | Free | Manual | Deep | Full | Push (2 models) |
| TrainingPeaks | $120/yr | Coach-driven | Deep | Full | Limited |
| Runna | $100/yr | Template | Basic | Pre-built | Yes (newer) |
| Strava | Free / $80/yr | None | Basic | None | Auto-sync |
| STAS + ChatGPT | Free* | AI-driven | Via Intervals | AI + calendar | Via Intervals |
Frequently asked questions
Is Zepp Coach free?
Basic Zepp Coach is free — daily readiness and simple recommendations. Advanced AI-generated training plans cost about €20/year. Available on Cheetah Pro, Balance 2, and some newer models.
What's the best free training app for Amazfit?
Intervals.icu. It's completely free with no limits — deep analytics (CTL/ATL/TSB), heart rate zone tracking, workout planning, and workout push to supported Amazfit models. Nothing else comes close at this price (free).
Can Amazfit work with TrainingPeaks?
Yes. Amazfit Active 3 Premium has direct TrainingPeaks integration. Other models can sync through Intervals.icu or third-party apps. TrainingPeaks Premium costs about $120/year.
What's the difference between Zepp Coach and a real AI coach?
Zepp Coach uses generic models and doesn't analyze your full training history. STAS + ChatGPT or Claude see all your data — every workout, pace, heart rate, sleep, and recovery — and personalize recommendations around your actual condition.
Can ChatGPT or Claude be my running coach?
Yes, with STAS. STAS connects your Intervals.icu data to ChatGPT or Claude so they can see your real training data. They can analyze workouts, track fitness trends, build periodized plans, and write structured workouts into your calendar.
Do I need to pay for Intervals.icu?
No. Intervals.icu is completely free — no trial, no subscription, no feature limits. It is supported by donations. You get analytics that competitors charge $100+/year for.
Related guides
Let ChatGPT and Claude use your real Amazfit data
Start with Intervals.icu (free analytics), then add STAS — so ChatGPT or Claude coach from your actual training, not a template.
Connect Intervals.icuFree to connect — no subscription needed