Comparison

Earth Clock Calendar vs Sol Clock

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

Head to head
About

Earth Clock Calendar

This app visualizes time and date based on celestial movements. It displays the Earth, Moon, and Sun's positions, offering a unique perspective on timekeeping and natural rhythms. Users can explore various cultural calendars and understand their relationship to natural cycles.

Highlights
  • Earth, Moon, and Sun visualization
  • Planetary time and date display
  • Automatic time zone and location adjustment
  • Moon phase tracking
  • Zodiac sign integration for months
  • Sunrise and sunset times
  • Multiple cultural calendar options
Features
Read full description

General Description: The EarthClock Calendar app is so much more than just a clock & calendar. Earth, Moon & Sun; their movements, rotation & orbital period are what give us the solar day, lunar month & seasonal year, the basic units of time & date. EarthClock shows planetary time & date. Every time you look to see What time is it?, you are reminded of the fact that we are all of us living on a planet, the living Earth, which carries you & feeds you, like a mother. Unique Features: EarthClock has no competition. It is unique, beautiful, educational & transformative. EarthClock features planet Earth at the center of a specially modified, time- & date-telling celestial ring. EarthClock automatically places a time zone-spanning hour hand at your location on the globe, taking into account your longitude & latitude. The Earth (with hour hand attached) spins once per day relative to the Sun. Think of the Moon going through its phases as just another hand on the calendar-clock. The Moon orbits the Earth about once every 29 & 1/2 days. Think of the signs of the zodiac as the months of a seasonal year. (The Sun, fixed at noon at the top of the dial, appears to move through all 12 signs of the zodiac over the course of a seasonal year.) Over the course of a year, the Sun also moves back & forth on the date indicator, and you can see how this effects the Earth’s circle of illumination. And don’t forget the twilight dial, which always shows the time of Sun rise & Sun set for any latitude & time of year. Widget: One of the most exciting features of the EarthClock app is that it offers a widget which shows up-to-date, planetary information right on the home screen of your iPhone. The “wide widget” (recommended) shows EarthClock to the left and a list of all day-events to the right. (You have to select the widget yourself. We can’t install it for you.) Select Calendars: You get ReConnected to the living Earth & solar system when you pay attention to the natural rhythms of the Earth. EarthClock can also help you reconnect to other cultures & people all around the globe. It does this by making available to you a variety of cultural calendars to select from. EarthClock comes with 2 free calendars: The Gregorian & Bahai calendars. The Chinese Agricultural calendar is available for 99¢ as an in-app purchase, and soon EarthClock will offer: Islamic, Hebrew, ancient & modern Hindu, Persian, Ecclesiastical, Tibetan calendar, & more. Every culture is defined by their calendar & how they organize time. With EarthClock, you can see how one calendar compares to another & how well they compare with the cycles of nature & the agricultural biorhythms our calendar units are named after. Both the Gregorian & Bahai calendars are solar calendars, designed to stay in alignment with the seasonal year. The Islamic calendar (coming soon) is a lunar calendar that doesn’t keep track of the seasonal year. The Chinese calendar is a lunisolar, agricultural calendar. Both the Sun & Moon are important for agriculture. By following the festivals & customs of an agricultural society, we can attune ourselves to the natural cycles of the seasons & harmonize better with both nature & our fellow human beings (human nature). Benefits: People refuse to give up their agricultural or religious calendars, and why should they? There’s nothing wrong with consulting 2 or more calendars, just like there’s nothing wrong with speaking 2 or more languages. The EarthClock Calendar app is the Rosetta Stone of Calendars. Testifying before Congress in 1985, on the subject of Climate Change, Carl Sagan said the following: “What is essential for this problem is a global consciousness, a view that transcends our exclusive identification with the generational and political groupings into which by accident we have been born. The solution to these problems requires a perspective that embraces the planet and the future, because we are all in this greenhouse together.”

About

Sol Clock

Features
Read full description

Sol Clock is a solar time clock connecting you to the rhythm of the sun and moon. Sol Clock shows you where the sun actually is, from nautical dawn through solar noon to deep night. Displayed on a beautifully crafted astronomical clock face inspired by the medieval clocks of Venice and Prague. Sol Clock displays true solar time alongside standard and UTC, so you always know where you stand in the actual solar day, not just the civil one. The Clock The clock face renders a full 24-hour solar day. The hand tracks the sun's position through the light spectrum of the day. The orbital ring shows the complete sky color spectrum for the day. Computed dynamically based on your location and the day's sunrise and sunset times. Sky Map The Sky Map shows an equidistant northern projection center on the North Pole with a live terminator line showing the boundary between day and night. Solar Compass The Solar Compass tracks the sun and moon in real time and shows their current relationship to the Equator and Tropics of Cancer and Capricorn. Events & Alarms Enable notifications for any point in the solar day: Nautical Dawn, Civil Dawn, Sunrise, Golden Hour End, Morning Light, Solar Noon, Afternoon Light, Golden Dusk, Sunset, Civil Dusk, Nautical Dusk, and Night. Each alarm fires at its precise solar time for your location, rescheduling automatically every day.

Screenshots

Earth Clock Calendar4 screens
Sol Clock4 screens

Verdict

The call

The clearest difference is update cadence: Sol Clock at every 3 days against Earth Clock Calendar's weekly. Earth Clock Calendar's advantage is iOS requirement (15.0 vs 26.0). On price, ads, in-app purchases 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. Earth Clock Calendar sells 1 one-off in-app purchase and Sol Clock sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Earth Clock Calendar ships an update weekly, Sol Clock every 3 days. The most recent releases landed on September 17, 2026 and September 11, 2026 respectively.

Scorecard2 real differences · 8 level
Earth Clock Calendar versus Sol Clock: the parameters behind the verdict, then further details
ParameterEarth Clock CalendarSol Clock
PriceFreeFree
Rating4.9 (7 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings7 — better—
Update frequencyWeeklyEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better26.0
Further details — not scored
Size18 MB8 MB
Age rating4+4+
DeveloperEarth at the Center LLCMark Zigadlo

In-app purchases

1 purchases

Earth Clock Calendar

One-time1
  • Chinese Calendar$0.99
2 purchases

Sol Clock

Subscriptions2
  • Pro Monthly7 Days trial$0.991 Month
  • Pro Annual7 Days trial$7.991 Year

Questions

Is Earth Clock Calendar free?
Earth Clock Calendar is free to download, with in-app purchases available.
Is Sol Clock free?
Sol Clock is free to download, with in-app purchases available.
Do Earth Clock Calendar or Sol Clock have ads?
Neither Earth Clock Calendar nor Sol Clock shows ads.
Which is updated more often, Earth Clock Calendar or Sol Clock?
Earth Clock Calendar ships an update weekly, and Sol Clock every 3 days. Most recently, Earth Clock Calendar was updated on September 17, 2026 and Sol Clock on September 11, 2026.

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