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ARC: Circadian Rhythm Tracker

Stop fighting your biology. Start working with it. ARC is a circadian rhythm tracker that maps your Perfect Day using chronobiology. Discover your chronotype, find your Peak Focus Windows, optimize caffeine timing, and anchor your sleep-wake cycle — all backed by science, all stored locally on your device.

$49
Revenue
75
Customers
iOSChronobiologyHealth TechProductivityBiohackingdiscipline
ARC Chronotype Discovery
Daily Trajectory Timeline
Peak Focus Windows
Caffeine Cutoff Tracker
Sleep & Wake Optimization
Circadian Rhythm Analytics
Biological Briefings
Settings & Preferences

How It Works

Get started with ARC: Circadian Rhythm Tracker in three simple steps.

01

Take the Diagnosis

Answer 15 science-backed questions about your sleep, energy patterns, caffeine habits, and goals. ARC calibrates your unique biological profile.

02

Discover Your Chronotype

Find out if you're a Lion (early riser), Bear (steady rhythm), Wolf (night owl), or Dolphin (light sleeper) — and what it means for your daily schedule.

03

Follow Your Daily Trajectory

Get a personalized 24-hour timeline with your Peak Focus Windows, optimal caffeine cutoff, sunlight anchoring time, and wind-down routine.

Features

15-Point Precision Diagnosis — calibrates chronotype, age, goals & night habits
Dynamic Daily Trajectory — 24-hour timeline of biological missions
Chronotype Discovery — Lion, Bear, Wolf, or Dolphin identity mapping
Caffeine half-life tracking — calculated cutoff to protect sleep quality
Peak Focus Windows — scientifically timed deep work intervals
Morning Sunlight Anchoring — cortisol & melatonin rhythm optimization
Biological Briefings — context-aware coaching with the science behind each action
Local-first architecture — SQLite on-device, your data never leaves your phone

Why ARC: Circadian Rhythm Tracker?

What makes ARC: Circadian Rhythm Tracker different from everything else.

Science-Backed, Not Guesswork

Built on peer-reviewed circadian research from Stanford Neuroscience and UC Berkeley Sleep Science. Every recommendation has a citation.

Privacy-First Architecture

All data stays on your device with local-first SQLite storage. No cloud sync, no data harvesting — your biological data never leaves your phone.

Not Another Habit Tracker

ARC doesn't just track what you do — it tells you when to do it. Aligned with your biology, not arbitrary goals.

Built for High Performers

Designed for founders, creators, and biohackers who treat their energy like a resource — not an afterthought.

Who Is ARC: Circadian Rhythm Tracker For?

Built for people who take their performance seriously.

Founders & Entrepreneurs

Optimize your decision-making and deep work windows around your natural energy peaks instead of burning out.

Creators & Writers

Find your creative peak hours and stop forcing output when your brain is wired for rest.

Biohackers & Health Enthusiasts

Go beyond sleep tracking. Understand the cortisol-melatonin rhythm that drives your entire day.

Remote Workers

Design your flexible schedule around biology, not just calendar availability.

Frequently Asked Questions

Everything you need to know about ARC: Circadian Rhythm Tracker.

What is a chronotype?
A chronotype is your body's natural preference for when to sleep and wake. There are four types: Lion (early riser, peak energy in the morning), Bear (follows the solar cycle, most common), Wolf (night owl, peak energy in the evening), and Dolphin (light sleeper, irregular patterns). ARC identifies yours through a 15-point diagnosis.
How is ARC different from a sleep tracker?
Sleep trackers tell you how well you slept last night. ARC tells you how to structure your entire day — when to do deep work, when to have caffeine, when to get sunlight, and when to wind down — based on your unique circadian rhythm. It's proactive, not reactive.
Is ARC based on real science?
Yes. ARC is powered by peer-reviewed research in chronobiology, including work from Dr. Andrew Huberman (Stanford Neuroscience) on light exposure and cortisol rhythms, and Dr. Matthew Walker (UC Berkeley) on sleep science and circadian cycles.
Does ARC collect my health data?
No. ARC uses a local-first architecture — all your data is stored on your device using SQLite. Nothing is sent to external servers. You can delete everything at any time from the app settings.
What does the caffeine cutoff feature do?
Caffeine has a half-life of about 5-6 hours, meaning half of it is still in your system hours after you drink it. ARC calculates your personal cutoff time based on your sleep schedule so caffeine doesn't interfere with your sleep quality.
Is ARC free?
ARC offers a free tier with core chronotype discovery and daily trajectory features. ARC Pro unlocks detailed biological briefings, advanced caffeine tracking, and more — available as a weekly ($3.99/week), monthly ($9.99/month), or yearly plan ($29.99/year, save 75%). All plans include a 3-day free trial.

Unlock ARC: Circadian Rhythm Tracker Pro

Start with a 3-day free trial. Cancel anytime.

All plans include full access to every Pro feature.

Weekly
$3.99/week
Monthly
$9.99/month
Save 75%
Yearly
$29.99/year

Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage subscriptions in your App Store account settings.

Get Started

Ready to try ARC: Circadian Rhythm Tracker? Choose your platform below.

Contact & Support

Need help with ARC: Circadian Rhythm Tracker? We're here to assist you.

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pritamfinds@gmail.com
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