Intervals.icu Alternative
Intervals.icu gives you the best free analytics in endurance sports. PMC charts, power curves, interval analysis — all brilliant. But when it's time to actually write a plan for your athlete, you're on your own. Athlin takes the same data and turns it into personalized training plans that learn how you coach.
Why data-driven coaches need more than Intervals.icu
You chose Intervals.icu because the data is exceptional — and free. PMC charts with configurable time constants. Power-duration modeling. Interval matching. No other free tool comes close. But Intervals.icu is fundamentally an analysis platform built for data-savvy athletes. Coaching workflows — plan creation, athlete roster management, onboarding, communication — were bolted on, not designed in.
Managing 15 athletes on Intervals.icu means 15 separate dashboards. There's no "who needs attention today" view. No team-wide recovery overview. No automated weekly digest. You end up clicking through athlete by athlete, mentally keeping track of who's fatigued, who's progressing, who missed sessions. The data is all there — but the coaching layer isn't.
And onboarding non-technical athletes? Good luck. Intervals.icu's interface is built for people who understand CTL, ATL, and TSB. Your athlete who just wants to see "run 45 min easy on Tuesday" doesn't need a power-duration curve — they need a clean, simple plan.
Athlin bridges the gap: your data intelligence, powered by AI that writes plans and a portal your athletes actually enjoy using.
Feature comparison
| Feature | Athlin | Intervals.icu |
|---|---|---|
| AI plan generation | ✅ Adaptive — learns your style | ❌ |
| Coaching style learning | ✅ Improves with every edit | ❌ |
| PMC / fitness-fatigue charts | ✅ Built-in | ✅ Best-in-class |
| Power-duration modeling | ⚠️ Planned | ✅ Excellent |
| Multi-athlete dashboard | ✅ Team view with recovery alerts | ⚠️ Per-athlete only |
| Athlete portal (non-technical) | ✅ Clean mobile web | ⚠️ Complex interface |
| Weekly team digest email | ✅ Automated | ❌ |
| Athlete communication tools | ✅ Built-in messaging | ❌ |
| Multi-sport beyond endurance | ✅ Any sport | ⚠️ Endurance focused |
| Garmin integration | ✅ Activities, HRV, sleep, stress | ✅ Activities and power |
| Apple Watch support | ✅ Native | ⚠️ Via Health API |
| Price | Free (beta) | Free (core) / paid extras |
Founding coach program
You love the data. Now imagine if AI turned it into training plans — automatically. Founding coaches get Athlin free, forever.
What you get instead
You already understand your athletes' data. Athlin takes that same data and generates actionable training plans — personalized and adapted to each athlete's current recovery state.
One view. All athletes. Who's recovering well, who's fatigued, who missed sessions, who needs a conversation. Athlin is built for coaches managing rosters — not athletes analyzing their own data.
Your athletes don't need to understand CTL and TSB. Athlin's portal shows them a clean plan: what to do today, this week. Behind the scenes, you see the full data picture.
Time calculator
7.5h
per week
32.3h
per month
390h
per year
With Athlin, AI drafts the plan from data, you review it. Instead of 7.5h per week, you spend minutes, not hours.
Check your fit
4 questions. Answer in 30 seconds.
Question 1 of 4
Do you manage more than 5 athletes on Intervals.icu?
Feature gap checker
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Frequently asked questions
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