Comparison

Alynna vs hellocetus

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

Head to head
About

Alynna

This app offers daily guidance to help you navigate your day with clarity and ease. It provides personalized reflections and mantras to help you pause and reset, offering real-time insights to stay aligned throughout your day.

Highlights
  • Daily focus and reflection
  • Personalized mantras
  • Real-time guidance
  • Emotional and relationship insights
  • Natural rhythm awareness
  • Intentional forward movement
Features
Read full description

Alynna is a gentle guide to help you move through each day with more clarity and ease. Each day begins with a simple focus— a reflection of what you’re currently navigating— along with a short, personalized mantra to help you pause, reset, and find your rhythm. But it doesn’t stop at awareness. Alynna extends this insight into your day— helping you sense how to act, adjust, and relate in real time. With subtle, ongoing guidance, you can stay aligned as your day unfolds— instead of only reflecting after it ends. At times, it also opens a deeper layer of awareness— offering gentle signals around relationships, emotions, and natural rhythms. Alynna doesn’t predict your future. It helps you understand where you are— and move forward with intention.

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

Alynna4 screens
hellocetus4 screens

Verdict

The call

The clearest difference is in-app purchases: Alynna at none against hellocetus's 3. Alynna also leads on update cadence (every 5 days vs monthly). hellocetus's advantage is ads (none vs shown) and iOS requirement (15.0 vs 18.6). On price 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. hellocetus sells 3 in-app purchases, starting at $1.99 per month. Alynna asks for nothing beyond the download.

UpkeepUpdate frequency

Alynna ships an update every 5 days, hellocetus monthly. Both last shipped on November 5, 2026.

Scorecard5 real differences · 5 level
Alynna versus hellocetus: the parameters behind the verdict, then further details
ParameterAlynnahellocetus
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews—100.0% of reviews
Number of ratings3 — better—
Update frequencyEvery 5 days — betterMonthly
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhoneiPhone, iPod — better
Requires iOS18.615.0 — better
Further details — not scored
Size332 MB77 MB
Age rating17+4+
Developerlocaphilia llcWaitcle

Customer experience

Alynna

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

hellocetus

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

In-app purchases

None

Alynna

No in-app purchases

3 purchases

hellocetus

Subscriptions2
  • HelloCetus Premium Monthly$1.991 Month
  • HelloCetus Premium Yearly$4.991 Year
One-time1
  • HelloCetus Premium$6.99

Questions

Is Alynna free?
Alynna is free to download, with no in-app purchases.
Is hellocetus free?
hellocetus is free to download, with in-app purchases available.
Do Alynna or hellocetus have ads?
Alynna shows ads; hellocetus does not.
Which is updated more often, Alynna or hellocetus?
Alynna ships an update every 5 days, and hellocetus monthly. Most recently, Alynna was updated on November 5, 2026 and hellocetus on November 5, 2026.

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