Comparison

Moontra vs hellocetus

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

Head to head
About

Moontra

Track the moon's phases and celestial events with this lunar companion. It provides real-time moon phase information, upcoming full and new moons, and eclipse tracking. Stay connected to the lunar cycle with a simple and elegant interface.

Highlights
  • Real-time moon phase viewing
  • Full moon and new moon tracking
  • Eclipse event discovery
  • Lunar calendar dates
  • Optional event notifications
  • Sky insights
Features
Read full description

Moontra – Your Lunar Companion Discover today’s moon phase, follow the lunar calendar, and stay aligned with celestial events. Moontra helps you: • View real-time moon phases • Explore upcoming full moons, new moons & eclipses • Track lunar calendar dates • Receive optional moon event notifications • Understand sky insights in a simple, elegant interface Whether you love astronomy, astrology, or simply watching the night sky, Moontra keeps you connected to the rhythm of the moon.

About

hellocetus

Track celestial events like supermoons, moon phases, and planet positions with this astronomy calendar. Plan observations, get local sun and moon times, and explore detailed sky data.

Highlights
  • Supermoon calendar with long-range dates
  • Daily moon phase and illumination tracking
  • Local sun and moon times
  • Planet position comparison
  • Save observation notes and reminders
  • Optional astronomy event alerts
Features
Read full description

hellocetus is an astronomy calendar for planning supermoons, following Moon phases, checking local Sun and Moon times, and comparing planet positions. Browse long-range events or open today’s sky data in one focused app. Plan ahead with the supermoon calendar • Browse long-range supermoon dates and astronomy events by year • See exact local event times and countdowns for upcoming supermoons • Explore Supermoons, Micromoons, Blue Moons, Black Moons, Harvest Moons, Hunter’s Moons, Blood Moons, Super New Moons, and Micro New Moons • Find solar and lunar eclipse dates in the same event calendar Follow the Moon day by day • View a monthly calendar with each day’s Moon phase and illumination • Open full moon details with the local event time, moonrise, moonset, city, time zone, and sky position • Check today’s moonrise, moonset, phase, illumination, and lunar angle • Save observation notes, plans, and reminders directly on calendar dates • Receive optional alerts one hour before supported astronomy events Compare planets and the sky • Switch between Local Sky, Earth-centered, and Sun-centered planet views • Compare altitude, azimuth, brightness, longitude, latitude, distance, right ascension, declination, and elongation • Follow short-term planetary motion with timeline views • Use a selected city or saved GPS location for local calculations • Compare standout constellations above the horizon across countries and representative cities • Explore planet surface previews in a clean globe-style interface Daily Sun and Moon information Check sunrise, sunset, total daylight, day-length change, moonrise, moonset, phase, and illumination at a glance. hellocetus brings long-range planning and everyday sky data into one focused experience. Free and Premium hellocetus includes advertising. Optional monthly, yearly, or lifetime Premium removes ads and unlocks the Home Screen full moon widget. Current products, localized prices, renewal details, and purchase terms are shown in the app before purchase. Available in 22 supported languages. Terms of Service: https://hellocetus.com/terms/ Apple Standard Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Moontra4 screens
hellocetus4 screens

Verdict

The call

The clearest difference is ads: hellocetus at none against Moontra's shown. Moontra's advantage is monetization model (ad-supported vs free with in-app purchases) and iOS requirement (13.0 vs 15.0). On price, update cadence, 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Moontra ships an update every 3 weeks, hellocetus monthly. Both last shipped on October 14, 2026.

Scorecard3 real differences · 7 level
Moontra versus hellocetus: the parameters behind the verdict, then further details
ParameterMoontrahellocetus
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews—100.0% of reviews
Number of ratings1 — better—
Update frequencyEvery 3 weeks — betterMonthly
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size22 MB77 MB
Age rating4+4+
DeveloperVeronica GutierrezWaitcle

Customer experience

Moontra

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

hellocetus

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Moontra

No in-app purchases

None

hellocetus

No in-app purchases

Questions

Is Moontra free?
Moontra is free to download, with no in-app purchases.
Is hellocetus free?
hellocetus is free to download, with no in-app purchases.
Do Moontra or hellocetus have ads?
Moontra shows ads; hellocetus does not.
Which is updated more often, Moontra or hellocetus?
Moontra ships an update every 3 weeks, and hellocetus monthly. Most recently, Moontra was updated on October 14, 2026 and hellocetus on October 14, 2026.

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