CYCLES ARC

reconnecting you with natural rhythms

Launching This Autumn

Cycles Arc App

Track the sun, moon and planets, plan with natural time, and reconnect with the oldest calendar humans have ever kept.

Learn More
Free · no purchase · the live sky

The sky over you, right now — free.

Sun, moon and planets for your exact spot, computed from NASA's DE441 ephemeris — exact for any date across 30,000 years, the same engine every book uses. Not a template with moons drawn on: real positions, read live. Share any of it — and make the moon of a date that matters to you.

Free · the flagship tool

The moon of your date

A birthday, an anniversary, the night you met — see its exact phase, computed from NASA's DE441 ephemeris across 30,000 years, painted to keep. Download or share it, free.

No account · nothing stored

Sun

  • Sunrise—
  • Sunset—
  • Day length—
  • Golden hour—

Season

— · next turn —

Moon today

—
  • Illumination—
  • Age—
  • Moonrise—
  • Moonset—

Visible tonight

  • —

Grant location or type a city to fill the sky. Every value is read live from the ephemeris — nothing is stored.

About

What is Cycles Arc?

Cycles Arc reconnects you with the natural rhythms that shape your life.

In our modern world, we have lost touch with the cycles of nature — moon phases, seasonal changes, and celestial events that have guided human life for millennia. Our apps bring these rhythms back into your awareness.

No mysticism. No predictions. Just clean, scientific data about the astronomical phenomena happening around you, presented beautifully and simply.

Track the moon. Observe the stars. Understand the cycles. Live in harmony with nature's calendar.

Cycles Arc

"The moon does not fight. It attacks no one. It keeps to its course — and by its very nature it gently influences."

01
Observe

Track the moon's phases, position, and rhythms with precise astronomical data — updated in real time.

02
Understand

Learn the historical and astronomical context behind each cycle — from ancient Rome to the present day.

03
Plan

Align your schedule with natural cycles. Set reminders for moon events that matter to you.

04
Live

Make natural time part of your daily life — not a practice, but a perspective.

Our Apps

Launch — Autumn 2026

Cycles Arc App

Complete lunar tracking with phases, rise/set times, historical data, and astronomical insights.

Learn More
Coming Soon

Alarms

Customizable notifications for celestial events, lunar cycles, and natural time markers.

Learn More

Shop

Explore Our Shop

Beautifully designed physical tools for living in natural time — calendars, planners, and more.

Visit Cycles Arc Shop

Cycles Arc App

Launching Autumn 2026

The real sky over you — the Sun, Moon and planets for your exact place and moment, computed from NASA’s DE441 ephemeris. Not a simulation: the actual sky, read live.

Reading the real stars — at any instant.

The Time Machine

Travel 30,000 years of real sky

Set the app to any instant from 13000 BCE to 17000 CE and it shows the true sky for that moment — every Sun, Moon and planet position computed from NASA’s DE441 ephemeris. Never simulated, never interpolated.

13000 BCEice age ends
3000 BCEfirst pyramids
TODAYlive sky
10000 CEdeep future
17000 CEfar edge
‹Year› ‹Month› ‹Day› ‹Hour›
↻  Jump back to live

What it does

  • Tonight — the Moon’s phase and illumination, the Sun right now, and which planets are up — brightest first.
  • The Moon — phase and illumination, a painted phase disc, altitude and azimuth, and a “where to look” compass.
  • The Sun — altitude, a twilight bar, azimuth and angular size — day or night at a glance.
  • Planets — every planet above your horizon, brightest first, with altitude and magnitude.
  • Any place on Earth — Mexico City, London, Tokyo, New York, or wherever you are.
  • Live views — a 3D Moon globe and a full star dome.
  • Subscribe to the sky — eclipses, planet retrogrades, conjunctions and moon phases as a live calendar feed you never have to refresh.
  • Three appearances — Night, Day, and a red night-vision mode that keeps your eyes dark-adapted under real stars.

Every value is computed from the DE441 ephemeris — not simulated, not approximated.

Pricing

Announced at launch.

Cycles Arc App arrives Autumn 2026.

Stay tuned for the launch of Cycles Arc App

Alarms

Coming Soon

A fully customizable notification system for natural events. Set personalized alarms for lunar phases, sunrise/sunset, moonrise/moonset, seasonal markers, and more.

Customizable Notifications For:

  • Lunar Phases — New moon, full moon, quarters
  • Sunrise & Sunset — Daily solar transitions for your location
  • Moonrise & Moonset — Precise lunar rise and set times
  • Seasonal Markers — Solstices, equinoxes, and cross-quarter days
  • Custom Events — Set your own natural time reminders

Pricing

Introductory Price

€12/year

Regular price: €24/year

Prices exclude VAT · applicable rate calculated at checkout

Stay tuned for the launch of Cycles Arc Alarms

Pricing

Get Cycles Arc Apps

Simple annual pricing. No subscriptions to complicated platforms. No overwhelming features. Just what you need to reconnect with natural time.

Launch — Autumn 2026

Cycles Arc App

  • ✓  Full lunar phase tracking
  • ✓  Historical data from Roman Empire
  • ✓  Rise & set times for your location
  • ✓  Speed, distance, luminosity

€9/year

Regular: €18/year

Excl. VAT

Coming Soon

Alarms

  • ✓  Lunar phase notifications
  • ✓  Sunrise & sunset alerts
  • ✓  Seasonal marker reminders
  • ✓  Custom natural time alarms

€12/year

Regular: €24/year

Excl. VAT

Bundle & Save

Get both apps together at a discounted rate. Details announced at launch.

Shop

Also in the Shop

Physical tools for natural timekeeping — calendars, planners, and more.

Visit Cycles Arc Shop

Affiliate Program

✨ Launching soon

Earn while sharing
something you believe in.

Refer your audience to Cycles Arc and earn commission on every subscription — including renewals, for as long as they stay subscribed.

Register Interest

Introductory offer: earn commission on subscription renewals — not just the first sale.

How it works

01

Apply

Fill in the form below. We review every application and get back to you within a few days.

02

Get your link

Receive your unique referral link with a 30-day cookie window. Share it anywhere.

03

Earn

Earn commission on every sale. Payouts via bank transfer once you reach €72.

Commission Tiers

Based on paying subscribers referred per calendar month.

Affiliate

10%

0–11 referrals per month

Default rate. Starts from your first sale.

Star Affiliate

12%

12–23 referrals per month

Unlocked automatically at 12 referrals.

Elite Affiliate

15%

24+ referrals per month

Unlocked automatically at 24 referrals.

Payouts via bank transfer once your balance reaches €72. During the introductory period, commissions are also earned on each renewal.

Waitlist

Be first in line

The program launches alongside Cycles Arc Alarms. Register your interest now.

Privacy Policy

Last Updated: December 2025

Introduction

Kairoi Co. OÜ ("we," "us," or "our") operates the Cycles Arc apps and website. This policy explains how we collect, use, and protect your personal information. This policy complies with GDPR (EU), CCPA (US), Privacy Act (Australia), and DPDP Act (India).

Information We Collect

Information You Provide:

  • Account details (name, email, phone, password)
  • Profile information and content you create
  • Payment information (processed securely by third parties)

Automatic Collection:

  • Device information and usage data
  • Location data (with your permission)
  • Cookies and similar technologies

How We Use Your Information

  • Provide and improve our apps
  • Process transactions and communicate with you
  • Personalize your experience
  • Ensure security and prevent fraud
  • Comply with legal obligations

Legal Basis (EU users): We process data based on consent, contract performance, legal obligations, or legitimate interests.

Your Rights

You may access, correct, or delete your personal information and opt-out of marketing at any time.

To exercise your rights: Contact us at [email protected]. We respond within 30–45 days.

Data Security & Retention

We use encryption, access controls, and security measures to protect your data. We retain data only as long as necessary, then securely delete it.

Contact Us

General Inquiries: [email protected]

Data Protection Officer (EU): [email protected]

Grievance Officer (India): [email protected] (24-hour response time)

Address: Sakala tn 7-2, Kesklinna linnaosa, Tallinn, Harju maakond, 10141, Estonia

Terms of Service

Last Updated: February 2026

Agreement to Terms

By accessing or using Cycles Arc apps and services, you agree to be bound by these Terms of Service. If you do not agree, please do not use our services.

Use of Services

You may use our services for lawful, personal, non-commercial purposes. You agree not to:

  • Reverse engineer, copy, or reproduce any part of our apps
  • Circumvent any access controls or subscription systems
  • Use automated tools to scrape or extract data from our services

Subscriptions & Billing

Cycles Arc apps are offered on an annual subscription basis. Subscriptions renew automatically unless cancelled. You may cancel at any time via account settings or by contacting [email protected].

All prices are in Euros and exclude VAT where applicable. VAT is calculated at checkout based on your location.

Refund Policy

We offer a 14-day money-back guarantee from the date of purchase. Contact us at [email protected] within 14 days for a full refund. No refunds are issued after this period.

Intellectual Property

All content within Cycles Arc apps is owned by Kairoi Co. OÜ and protected by applicable intellectual property laws. You may not reproduce or distribute any content without written permission.

Governing Law

These Terms are governed by the laws of Estonia. Disputes shall be resolved in the courts of Tallinn, Estonia, unless otherwise required by mandatory consumer protection law in your jurisdiction.

Contact

Kairoi Co. OÜ — Sakala tn 7-2, Tallinn, 10141, Estonia

[email protected]

Contact Us

Get in touch with the Cycles Arc team.

Team

CEO

Erick X. Llamas

erick.x@cyclesarc.com

Chief Software Engineer

Heidi Palmer

[email protected]

Design and Social Media Director

Nicole Falla

[email protected]

Business Strategy

Hannah Cremona

[email protected]

Sales & Business Development

Thomas Lowe

[email protected]