Comparison

Earth Clock Calendar vs Projects Timer

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 Earth Clock 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. Earth Clock 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: Earth Clock has no competition. It is unique, beautiful, educational & transformative. Earth Clock features planet Earth at the center of a specially modified, time- & date-telling celestial ring. Earth Clock 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 Earth Clock 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 Earth Clock 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. Earth Clock 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. Earth Clock comes with 2 free calendars: The Gregorian & Bahai calendars. It has a total of 21 calendars available to purchase, as well as the ability to include your personal event calendars on the Earth Clock Dial. Every culture is defined by their calendar & how they organize time. With Earth Clock, 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 Earth Clock 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

Projects Timer

Features
Read full description

We can work all day and still get little done. To fix that set a timer and focus for a bit. Then take a break and relax. Working with a timer is 5 times more effective. You finish more by doing less. When the timer is running, it's hard to get distracted. At the end, you write down what you did. If thousands of people boosted their productivity with a timer, then you can too!

Screenshots

Earth Clock Calendar4 screens
Projects Timer3 screens

Verdict

The call

The clearest difference is in-app purchases: Projects Timer at none against Earth Clock Calendar's 8. Earth Clock Calendar's advantage is iOS requirement (16.6 vs 18.0). On price, update cadence, ads 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 8 one-off in-app purchases. Projects Timer asks for nothing beyond the download.

UpkeepUpdate frequency

Earth Clock Calendar ships an update every 3 weeks, Projects Timer fortnightly. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Earth Clock Calendar versus Projects Timer: the parameters behind the verdict, then further details
ParameterEarth Clock CalendarProjects Timer
PriceFreeFree
Rating4.7 (11 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings11 — better—
Update frequencyEvery 3 weeksFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS16.6 — better18.0
Further details — not scored
Size30 MB2 MB
Age rating4+4+
DeveloperEarth at the Center LLCVladyslav Oleksenko

In-app purchases

8 purchases

Earth Clock Calendar

One-time8
  • All CalendarsFree
  • Chinese Calendar$0.99
  • English$0.99
Show 5 more
  • Indian Calendars$0.99
  • Hebrew Calendar$0.99
  • Alexandrian Calendars$0.99
  • Iranian Calendars$0.99
  • US English$1.99
None

Projects Timer

No in-app purchases

Questions

Is Earth Clock Calendar free?
Earth Clock Calendar is free to download, with in-app purchases available.
Is Projects Timer free?
Projects Timer is free to download, with no in-app purchases.
Do Earth Clock Calendar or Projects Timer have ads?
Neither Earth Clock Calendar nor Projects Timer shows ads.
Which is updated more often, Earth Clock Calendar or Projects Timer?
Earth Clock Calendar ships an update every 3 weeks, and Projects Timer fortnightly. Most recently, Earth Clock Calendar was updated on November 4, 2026 and Projects Timer on October 31, 2026.

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