Comparison

Solar Circadian Clock vs SunSync

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

Head to head
About

Solar Circadian Clock

Features
Read full description

This app provides the main Solar information and Circadian Rhythm for a location. This aims to provide you with healthy timings to sleep and wake up, as well as the ideal times for your meals, and activities, that is in sync with your natural rhythm. What is β€œCircadian Rhythm”? Circadian rhythm is your body's natural, 24-hour internal clock. It regulates a wide range of bodily functions, such as sleep-wake cycles, hormone production, and body temperature. This internal clock is primarily influenced by light exposure, with the master clock located in a tiny region of the brain. A well-functioning circadian rhythm is essential for optimal health, as disruptions can lead to various health problems. Solar: β€’ Solar Midnight β€’ Twilight Start β€’ Sunrise β€’ Solar Noon β€’ Sunset β€’ Twilight End β€’ Sunlight Duration β€’ Daylight Duration Sleep: These sleep timings take into account the circadian rhythm and sleep cycles. It then works out the optimal timings to maximise rest. β€’ Optimal Wake Up Time β€’ Optimal Bedtime β€’ Deepest Sleep Meals: These meal timings take into account the circadian rhythm and the body's metabolism. β€’ Optimal Breakfast Time β€’ Optimal Lunch Time β€’ Optimal Dinner Time

About

SunSync

Features
Read full description

Always tired, waking groggy, or struggling to fall asleep? The cause might be simpler than you think β€” your morning light routine. SunSync syncs your day to the sun. Track sunlight exposure, estimate your vitamin D intake, and get personalized circadian rhythm guidance β€” all based on your real location and habits. Your body clock controls your sleep, energy, mood, and focus. SunSync helps you work with it β€” not against it. With SunSync you can: - Track sunlight exposure and daily light habits β€” know when you've hit your target - Estimate vitamin D from sun exposure based on your skin type and location - Log supplements and monitor your total daily intake - Follow personalized circadian recommendations for your schedule - Discover your best sunlight windows β€” and when to avoid the UV index - Build routines to improve sleep and melatonin production naturally - Set smart reminders for sunrise, sunset, and wind-down time - Add a home screen widget β€” see your vitamin D window at a glance, without opening the app - View history and long-term trends to see your progress Built for the biohacking community β€” and anyone who just wants to feel better. Whether you're optimizing for performance or simply tired of being tired, SunSync gives you the sunlight data your wellness routine has been missing. Vitamin D tracking, body clock alignment, supplement logging, and a home screen widget showing your vitamin D window β€” in one app. Disclaimer: SunSync provides estimates and general wellness guidance. It is not a medical device and does not replace professional medical advice. Terms: https://martarodriguezm.github.io/SunSyncLegal/terms.html Privacy Policy: https://martarodriguezm.github.io/SunSyncLegal/privacy.html

Screenshots

Solar Circadian Clock4 screens
SunSync4 screens

Verdict

The call

The clearest difference is ads: SunSync at none against Solar Circadian Clock's shown. Solar Circadian Clock's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.6). On price and in-app purchases there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Solar Circadian Clock sells 1 one-off in-app purchase and SunSync sells 2 in-app purchases, starting at $1.99 per year. Whichever you choose, the download price is not the number that matters.

Scorecard3 real differences Β· 3 level
Solar Circadian Clock versus SunSync: the parameters behind the verdict, then further details
ParameterSolar Circadian ClockSunSync
PriceFreeFree
Update frequencyβ€”Every 3 weeks
AdsYesNo β€” better
In-app purchasesYesYes
DevicesiPhone, iPad, iPod β€” betteriPhone
Requires iOS13.0 β€” better17.6
Further details β€” not scored
Size33 MB25 MB
Age rating4+4+
DeveloperDamien DevillianMarta Rodriguez

In-app purchases

1 purchases

Solar Circadian Clock

One-time1
  • Upgrade$3.99
2 purchases

SunSync

Subscriptions1
  • Year3 Days trial$1.991 Year
One-time1
  • Lifetime$2.99

Questions

Is Solar Circadian Clock free?
Solar Circadian Clock is free to download, with in-app purchases available.
Is SunSync free?
SunSync is free to download, with in-app purchases available.
Do Solar Circadian Clock or SunSync have ads?
Solar Circadian Clock shows ads; SunSync does not.

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