# hellocetus: supermoon calendar — Moon Phases, Planets & Sky > Astronomy calendar for supermoons, moon phases, planets, and sky events. (iPhone/iPad app by Waitcle.) - Source: https://appshunter.io/ios/app/hellocetus-supermoon-calendar/id6759944569 (this page in markdown: same URL + `.md`) - Developer: [Waitcle](https://appshunter.io/developer/1824924378) - Category: Lifestyle, Utilities - Price: Free - Age rating: 4+ - Requires: iOS 15.0 · 77 MB - Languages: American English, Dutch, French (France), German (Germany), Hindi, Indonesian, Italian, Japanese, Korean, Polish and 8 more - Released: 2026-03-29 - Data updated: 2026-08-17 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/hellocetus-supermoon-calendar/id6759944569/reviews.md ## What is hellocetus? 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/ ## Key features - 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 ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/hellocetus-supermoon-calendar/id6759944569/reviews.md ### 5/5 — 달중독자에게 짱 *2026-05-04* 보기쉬워서 좋아요 ### 5/5 — 와~~넘 좋아요 *2026-04-03* 캘린더에 달 모양보고 달구경하러 고고 벗꽃사이에 둥근달이 우왕 넘 이쁘다 ㅎ 왕마음에듬 ## Frequently asked questions about hellocetus ### What is hellocetus? hellocetus is an astronomy calendar designed for planning supermoons, following moon phases, checking local sun and moon times, and comparing planet positions. It offers both long-range event browsing and daily sky data. ### What types of moon events does hellocetus track? hellocetus tracks Supermoons, Micromoons, Blue Moons, Black Moons, Harvest Moons, Hunter’s Moons, Blood Moons, Super New Moons, and Micro New Moons. It also includes solar and lunar eclipse dates. ### Can I save my observations in hellocetus? Yes, you can save observation notes, plans, and reminders directly on calendar dates within hellocetus. This helps you keep track of your stargazing activities and plans. ### Does hellocetus offer alerts for astronomy events? hellocetus provides optional alerts one hour before supported astronomy events. You can enable these notifications to ensure you don't miss important celestial occurrences. ### What planet views are available in hellocetus? hellocetus allows you to switch between Local Sky, Earth-centered, and Sun-centered planet views. You can compare various celestial metrics like altitude, azimuth, brightness, and distance. ### What devices is hellocetus available on? hellocetus is available on iPhone and iPod devices. It is designed for iOS users interested in astronomy. ### How often is hellocetus updated? The latest version of hellocetus is 1.0.16, last updated on July 20, 2026. This indicates regular updates to improve functionality and add new features. ### Is hellocetus free to use? hellocetus is free to download and use, but it includes advertising. An optional Premium subscription is available for a monthly, yearly, or lifetime fee, which removes ads and unlocks the Home Screen full moon widget. ## Version history (last 4 releases) ### 1.0.16 — 2026-07-20 The Full Moon widget has been added! ### 1.0.12 — 2026-05-07 Performance optimization has been carried out. ### 1.0.11 — 2026-04-04 Improved UI/UX and optimized app performance. ### 1.0.10 — 2026-03-29 No release notes. ## More apps by Waitcle - [Waitcle: Astro Tarot Prompt](https://appshunter.io/ios/app/waitcle-astro-tarot-prompt/id6748270348) - [DotDay – 365 Day Grid Diary](https://appshunter.io/ios/app/dotday-365-day-grid-diary/id6748271653) - [OTAKIQ: Brain Puzzle Math Game](https://appshunter.io/ios/app/otakiq-brain-puzzle-math-game/id6753887735) - [TodayQuestion:Question Journal](https://appshunter.io/ios/app/todayquestionquestion-journal/id6754971491) - [Saftera: Offline Safety Kit](https://appshunter.io/ios/app/saftera-offline-safety-kit/id6767459753) All apps by Waitcle: https://appshunter.io/developer/1824924378 ## Related topics [waitcle](https://appshunter.io/ios/topics/waitcle) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*