Comparison

Monad Calendar Clock vs Mars Climate

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

Head to head
About

Monad Calendar Clock

This app visualizes time through planetary and celestial movements, contrasting natural rhythms with mechanical time. It offers unique perspectives on Earth's position in space and time, showing star and planet locations, seasonal changes, and lunar phases.

Highlights
  • Planetary time and date display
  • Celestial ring visualization
  • Heliocentric and Geocentric modes
  • Star and planet location tracking
  • Seasonal and lunar phase progression
  • Twilight and sunrise/sunset times
  • Event scheduling
Features
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MONAD does something that no other clock or calendar does; it tells the planetary time and date – the solar day, lunar month & seasonal year. MONAD reveals your unique place (and perspective) in planet-centered space and time. MONAD demonstrates the biorhythms of the Earth’s biosphere, and it integrates two types of time: 1) Natural time, which is cyclic, variable, and alive, with 2) Mechanical time, which is linear, highly regular, abstract and artificial. MONAD represents a paradigm shift of planetary proportions; A New Paradigm of Time With MONAD, you see the natural rhythms of time­ proceeding in endless circles and spirals. MONAD shows the location of the stars and planets; what’s visible at night from your location on Earth. MONAD shows the progression of the four seasons and the phases of the Moon; the obliquity of the ecliptic and the Earth’s circle of illumination, and a Twilight Dial tells you the time of Sun rise and Sun set at any latitude and time of year. MONAD shows the agricultural biorhythms of the Earth’s photosynthetic biosphere. MONAD restores the Earth, and the Earth’s biorhythms and biosphere, back to the center of our collective attention and awareness. With MONAD you see the Earth globe from an unusual perspective; the north (or south) polar axial perspective. MONAD automatically places a time zone-spanning Hour Hand at your location on the globe, marking your longitude & latitude, and you see all 24 time zones, all around the globe at the same time, the whole world interconnected. MONAD has four main Modes of operation. Geocentric (Geo) Mode features planet Earth at the center of a time and date-telling, 3-dimensional celestial ring. The algorithms and programming which drive all of the astronomical activity is based on a Sun-centered and highly accurate model of the solar system which you can access in Heliocentric (Helio) Mode. Accelerate through time, into the past or future, and watch how the configuration of the solar system changes. Shift back and forth from Geo to Helio Modes, and it’s easy to see how the two perspectives are related. It’s easy to see how and why the planets have apparent retrograde activity from an Earth-centered perspective. There is so much to explore and learn in MONAD. Astro Mode features a 2-dimensional Calendar-Clock face, which makes it possible to set the time by dragging the hour hand around the dial, or you can set the date by dragging the calendar band, or zodiac band, past the Sun’s meridian or date indicator fixed at noon at the top of the dial. A Table at the top of the screen lists the precise location of the Sun, Moon and planets at any time and date, so basically this Astro screen is equivalent to an astronomy or astrology chart, at any moment in time. Astro Mode will eventually feature a Scientific Astrology Program and an Educational Astronomy Program. Event Mode is where you record and schedule personal events, in the context of important and memorable planetary events we all share. Color-coded Event Wedges are shown in the context of the 4 corners of a solar day (Sun rise, noon, Sun set & midnight), the 4 corners of a lunar month (full and dark Moon, waxing and waning half Moons), and the 4 corners of a seasonal year (equinoxes & solstices). Another unique feature of MONAD is that you can record events “in the Now,” which encourages more presence in your life. A Health Event Mode allows you to see your personal, endocrine biorhythms in the context of planetary biorhythms we all share. The 24 hour circadian Calendar-Clock face is ideally suited to organize and display health events. If you choose to have MONAD integrate with the Apple Health app (HealthKit); then health data (e.g. Sleep period and Steps) read from HealthKit is used for display within the MONAD app. MONAD is beautiful, educational & transformative, and it will change the way you see the world around you, and your place within it. MONAD – A New Paradigm of Time.

About

Mars Climate

Explore the daily weather patterns and climate conditions on the planet Mars. This educational application provides insights into Martian atmospheric data.

Highlights
  • Daily Martian climate information
  • Educational content about Mars
  • Planet exploration insights
Features
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Learn about the daily climate on planet Mars!

Screenshots

Monad Calendar Clock4 screens
Mars Climate1 screens

Verdict

The call

The clearest difference is price: Mars Climate at Free against Monad Calendar Clock's $0.99. Mars Climate also leads on review sentiment (50% vs 22%). Monad Calendar Clock's advantage is rating (3.7 vs 3.0) and update cadence (every 6 weeks vs every 12 months). On ads, in-app purchases, device support and iOS requirement 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

Mars Climate is free to download; Monad Calendar Clock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Monad Calendar Clock holds the better App Store score, 3.7 against 3.0. That said, the two scores are not equally well evidenced: Monad Calendar Clock has 14 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 22% of Monad Calendar Clock's written reviews are positive against 50% of Mars Climate's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Monad Calendar Clock ships an update every 6 weeks, Mars Climate every 12 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
Monad Calendar Clock versus Mars Climate: the parameters behind the verdict, then further details
ParameterMonad Calendar ClockMars Climate
Price$0.99Free — better
Rating3.7 (14 ratings) — better3.0 (2 ratings)
Positive reviews22.2% of reviews50.0% of reviews — better
Number of ratings14 — better2
Update frequencyEvery 6 weeks — betterEvery 12 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better13.2
Further details — not scored
Size266 MB5 MB
Age rating4+4+
DeveloperEarth at the Center LLCDJ Brunk

Customer experience

Monad Calendar Clock

All ratings14 ratings
Positive64.3%
Neutral7.1%
Negative28.6%
Written reviews9 reviews
Positive22.2%
Neutral11.1%
Negative66.7%

Mars Climate

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Monad Calendar Clock

No in-app purchases

None

Mars Climate

No in-app purchases

Questions

Is Monad Calendar Clock free?
Monad Calendar Clock costs $0.99, with no in-app purchases.
Is Mars Climate free?
Mars Climate is free to download, with no in-app purchases.
Which has better reviews, Monad Calendar Clock or Mars Climate?
Monad Calendar Clock is rated higher. Monad Calendar Clock averages 3.7 out of 5 from 14 ratings, while Mars Climate averages 3.0 from 2 ratings.
Do Monad Calendar Clock or Mars Climate have ads?
Neither Monad Calendar Clock nor Mars Climate shows ads.
Which is updated more often, Monad Calendar Clock or Mars Climate?
Monad Calendar Clock ships an update every 6 weeks, and Mars Climate every 12 months. Most recently, Monad Calendar Clock was updated on November 6, 2026 and Mars Climate on November 3, 2026.

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