Comparison

Circadian Rhythm vs Training Loader

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

Head to head
About

Circadian Rhythm

Align your daily routines with your body's natural biological clock. Gain personalized insights to improve sleep, boost energy, and enhance focus by understanding your circadian rhythm. Optimize your day with alerts for hormone peaks and sunlight guidance.

Highlights
  • Circadian Rhythm Tracking
  • Sleep Insights & Trends
  • Hormone Peak Information
  • Daily Rhythm Alerts
  • Mood Tracking
  • Sunlight Guidance
  • Personalized Recommendations
Features
Read full description

Sync your day with your body clock. Circadian Rhythm shows when your body is wired for energy, focus, training and sleep — and builds a simple daily routine around it. YOUR CIRCADIAN CLOCK See your whole day on one 24-hour clock: cortisol rise, morning sunlight, cognitive peak, afternoon dip, highest body temperature, melatonin rise and more — all timed to your own wake-up and bedtime. A DAILY ROUTINE THAT FITS YOU Pick the habits you want — morning light, coffee timing, deep work, exercise, last meal, wind-down, screens off — and every action is scheduled around your personal rhythm, with gentle reminders. SLEEP INSIGHTS Track bedtime and wake-up consistency, see how close you are to your goals, and spot trends over 7, 30 or 90 nights. Syncs with Apple Health. APPLE WATCH, WIDGETS & LIVE ACTIVITIES Your protocol on your wrist, on your Home and Lock Screen, and in the Dynamic Island. Apple Watch can even check off your morning sunlight automatically. REAL SUNSET, EVERY DAY Sunset and sunrise follow your location and the seasons, so evening wind-down always lands at the right time. Science-based and private: your data stays on your devices. CIRCADIAN PRO Unlock sleep history, the Apple Watch app, premium widgets, unlimited reminders and custom events with an auto-renewing monthly or yearly subscription. Payment is charged to your Apple ID. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.termsfeed.com/live/018ea806-3cfc-4ebb-992e-ed571271d16c

About

Training Loader

Features
Read full description

I love the "Training Load" feature of Apple Fitness, but it is dependent upon effort scoring, which I consistently forget to do. Especially when my workouts are flowing in from other fitness sources like Peloton, Oura, Slopes, Strava, etc. So, I developed Training Loader to fill that gap... After calibrating the model against recent workouts, Training Loader automatically sets the workout effort score for you, in the background, based on caloric burn and average heart rate. You can also quickly override the score for any workout Training Loader sets for you. I hope you find it useful!

Screenshots

Circadian Rhythm4 screens
Training Loader4 screens

Verdict

The call

The clearest difference is price: Circadian Rhythm at Free against Training Loader's $0.99. Circadian Rhythm also leads on device support (3 vs 1) and iOS requirement (17.0 vs 26.0). Training Loader's advantage is in-app purchases (none vs 3). On update cadence and ads 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

Circadian Rhythm is free to download; Training Loader costs $0.99 up front. Circadian Rhythm sells 3 in-app purchases, starting at $4.99 per month. Training Loader asks for nothing beyond the download.

UpkeepUpdate frequency

Circadian Rhythm ships an update monthly, Training Loader every 2 months. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
Circadian Rhythm versus Training Loader: the parameters behind the verdict, then further details
ParameterCircadian RhythmTraining Loader
PriceFree — better$0.99
Rating4.6 (11 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings11 — better—
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS17.0 — better26.0
Further details — not scored
Size18 MB3 MB
Age rating4+4+
DeveloperJoaquin MarticorenaOne Reaction LLC

In-app purchases

3 purchases

Circadian Rhythm

Subscriptions2
  • Circadian PRO$4.991 Month
  • Circadian PRO7 Days trial$29.991 Year
One-time1
  • Lifetime Premium$4.99
None

Training Loader

No in-app purchases

Questions

Is Circadian Rhythm free?
Circadian Rhythm is free to download, with in-app purchases available.
Is Training Loader free?
Training Loader costs $0.99, with no in-app purchases.
Do Circadian Rhythm or Training Loader have ads?
Neither Circadian Rhythm nor Training Loader shows ads.
Which is updated more often, Circadian Rhythm or Training Loader?
Circadian Rhythm ships an update monthly, and Training Loader every 2 months. Most recently, Circadian Rhythm was updated on October 30, 2026 and Training Loader on October 25, 2026.

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