Comparison

AI Endurance vs circady

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

AI Endurance

This AI-powered fitness coach analyzes your personal data to create a customized training plan. It's designed for athletes looking to optimize their performance and achieve superior results by training smarter.

Highlights
  • AI-powered performance analysis
  • Personalized training plans
  • Optimized for unique physiology
  • Trusted by cyclists, runners, triathletes
  • Train smarter, not harder
Features
Read full description

AI Endurance is the data-driven AI coach for running, cycling, and triathlon. It learns from your own training to build a model of you (your fitness, your recovery, your race goal), then shapes your plan around that model and adapts it every day, so you always know what to do next. WHY ATHLETES CHOOSE AI ENDURANCE • Adaptive AI training plans: Set a race goal and get a full plan that reshapes itself as your fitness and recovery change. No more rigid plans that fall apart after one bad week. • Recovery you can trust: We read your HRV, resting heart rate, and DFA a1 to tell you when to push and when to back off, so you train hard without digging a hole. • Talk to your AI coach: Ask questions in plain language. Change a workout, understand your data, or plan your week just by chatting. • See inside every workout: Power and pace curves, durability, decoupling, and drift analysis that show exactly how your fitness is changing. • Built to peak, not just predict: Most apps stop at predicting a race time. AI Endurance builds your entire plan to optimize your race-day performance, and refines it as your data changes. • Two-way sync, not just a connection: AI Endurance imports your workouts from Garmin, Strava, Coros, Polar, Wahoo, Suunto and more, and reads your recovery data from Oura, Whoop, and your watch. Then it pushes your planned workouts straight to Garmin, Coros, Wahoo, Zwift, TrainingPeaks and more, ready to train with no manual entry. FOR EVERY ENDURANCE ATHLETE Whether you're chasing a first 5K, a Boston qualifier, a century ride, or an Ironman, AI Endurance meets you where you are and grows with you. Runners, cyclists, and triathletes all train from one adaptive plan. Train smarter. Recover better. Race faster. Download AI Endurance and get a coach that actually adapts to you. By using AI Endurance, you agree to our Privacy Policy and the Apple Standard End User License Agreement (EULA). - Privacy Policy: https://aiendurance.com/privacypolicy - Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

circady

Features
Read full description

circady — Your Personal Longevity Protocol Longevity is not one habit. It is the science of keeping every system in your body performing at its best — sleep, movement, nutrition, mindfulness, social connection, and the molecules that support them all. circady tracks all six domains in one place, shows you where you stand right now, and tells you exactly when each routine is ready to be repeated. No questionnaire to fill out. HOW IT WORKS Every routine has a personal recovery window. After you log it, circady tracks the cycle: • Recovering — your body is still processing the last session • Ready — the optimal window to repeat • Needs attention — overdue; this domain is falling behind A Longevity Index score (0–100) summarizes your overall protocol coverage. The higher the score, the more domains you are actively maintaining within their ideal windows. This is supercompensation: come back when you are stronger, not on a fixed calendar date. BUILD YOUR PROTOCOL Start from expert blueprints or build from scratch: • Protocols distilled from leading longevity researchers and evidence-based guidelines • New frameworks added regularly via server-side updates — no app update needed • Fully customizable: rename, adjust recovery windows, set duration, and link to HealthKit • Up to 300 active routines across all domains SIX LONGEVITY DOMAINS • Movement — strength, HIIT, Zone 2 cardio, flexibility • Mental — meditation, journaling, breathwork, learning • Sleep — sleep schedule, no-screen wind-down, naps • Social — quality time, community, nature • Nutrition — fasting, meal timing, specific diets • Molecules — supplements, vitamins, peptides KEY FEATURES • Longevity Index — a single score (0–100) for your overall protocol health • Category tiles — per-category scores with Excellent / Very Good / Good / Fair / Needs Work labels • Daily Coach — surfaces the weakest domain each day with a targeted action tip • Streak tracking — a visual that grows through levels at 7, 14, and 21 consecutive optimal days • Timeline calendar view — see your full history at a glance • HealthKit integration — auto-complete routines from Workouts, sleep data, and more; write back to Health • Apple Watch companion — log and view your protocol from your wrist • iCloud sync — your protocol stays in sync across all your devices • Sign in with Apple — private, fast, secure account • 8 visual themes — personalize the look of your protocol tracker • Export — download your full history as CSV PRIVACY • Sign in with Apple (no password, no third-party login) • All data stored in your private iCloud container • Analytics are minimal and can be disabled in Settings • No advertising, no data selling DISCLAIMER circady is for general informational and educational purposes only. It does not provide medical advice, diagnosis, or treatment and is not a substitute for consultation with a licensed healthcare provider. Always seek the advice of a qualified physician regarding any medical condition.

Screenshots

AI Endurance4 screens
circady4 screens

Verdict

The call

The clearest difference is in-app purchases: circady at none against AI Endurance's 2. AI Endurance's advantage is iOS requirement (15.0 vs 18.6). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. AI Endurance sells 2 in-app purchases, starting at $20.00 per month. circady asks for nothing beyond the download.

Scorecard2 real differences · 8 level
AI Endurance versus circady: the parameters behind the verdict, then further details
ParameterAI Endurancecircady
PriceFreeFree
Rating4.2 (25 ratings) — better—
Positive reviews62.5% of reviews—
Number of ratings25 — better—
Update frequencyEvery 5 months—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS15.0 — better18.6
Further details — not scored
Size3 MB12 MB
Age rating4+17+
DeveloperAI EnduranceMarkus Kant

In-app purchases

2 purchases

AI Endurance

Subscriptions2
  • Monthly Subscription$20.001 Month
  • Yearly Subscription$200.001 Year
None

circady

No in-app purchases

Questions

Is AI Endurance free?
AI Endurance is free to download, with in-app purchases available.
Is circady free?
circady is free to download, with no in-app purchases.
Do AI Endurance or circady have ads?
Neither AI Endurance nor circady shows ads.

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