Comparison

Mooncast vs UV Index

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

Head to head
About

Mooncast

Discover the current phase of the moon with stunning visuals and precise data. Explore the lunar cycle, track upcoming full and new moons, and access historical and future lunar information. This app offers a beautiful and accurate way to stay informed about celestial events.

Highlights
  • High-fidelity moon phase visuals
  • Interactive lunar timeline
  • Accurate full and new moon predictions
  • Long-term lunar almanac
  • Precise peak moon timestamps
  • Smart lunar event reminders
  • Customizable visual themes
Features
Currently charting
Read full description

Mooncast is a beautifully crafted app showcasing the current phase of the moon with precision and clarity. This app is designed for both casual curiosity and serious sky-watchers. Explore the lunar cycle in rich visual detail, swipe through days to see past and future phases, and instantly find the next full moon or new moon. Mooncast gives you accurate lunar data for any date between 2011 and 2035, including the exact moment the moon becomes perfectly full. Features: - Stunning, high-fidelity moon phase visuals - Interactive timeline — swipe to explore any day - Accurate predictions for full moons, new moons, and all lunar phases - Built-in almanac for long-term browsing and planning - Precise timestamps for peak full moon and new moon - Smart reminders for full moon and new moon events - Customizable look - pick your favorite sky and clouds - Several types of widgets and accessories are available Extensive coverage: - available on iPhone, iPad, Mac, Apple Watch and Apple TV International support: - Fully localized in English, French, Spanish, Italian, German, Russian - Works seamlessly with all locales and calendar systems Mooncast is simple to use, scientifically accurate, and visually refined — the lunar calendar you’ll actually enjoy checking every day.

About

UV Index

This app provides real-time UV radiation levels based on your location. It offers recommendations for sun protection and suggests appropriate clothing to safeguard your skin and eyes from harmful solar ultraviolet radiation.

Highlights
  • Real-time UV radiation measurement
  • Location-based UV index
  • Sun protection recommendations
  • Recommended clothing indicator
  • Search for cities
  • Save favorite locations
Features
Currently charting
Read full description

Never let your guard down. The app shows you the ultraviolet radiation level in your location and helps you understand how to protect yourself while in the sun. The higher the UV Index value, the greater the potential risk to your skin and eyes. The app provides clear information about the current level, weather conditions, and recommended protection. ### FEATURES • Current UV Index • Daily and hourly UV forecasts • Chart showing UV levels throughout the day • Current location detection • Search for cities around the world • Unlimited saving of favorite locations • Weather conditions • Protection recommendations based on the UV Index • Guidance for umbrellas, T-shirts, hats, and sunglasses • Light and dark modes • Support for iPhone and iPad ### HOW IT WORKS Turn on Location Services and make sure your device is connected to the Internet. The app will detect your location and show the UV Index for the selected location. You can also search for other cities, save favorite locations, and check the forecast for the following days. The UV Index was developed to raise awareness of the risks associated with excessive exposure to solar radiation through a collaboration between the World Health Organization, the United Nations Environment Programme, the World Meteorological Organization, and the International Commission on Non-Ionizing Radiation Protection (ICNIRP). The information provided by the app is for informational purposes only and does not replace the advice of a doctor or qualified professional. ### SUPPORT For assistance, email us at: info@lionsapp.com You can also visit: www.lionsapp.com If you find the app useful, please leave us a review on the App Store. Thank you for your support.

Screenshots

Mooncast4 screens
UV Index4 screens

Verdict

The call

Mooncast and UV Index both sit at 4.8 stars, but that hides the real split: 91% of Mooncast's written reviews are positive against 21% of UV Index's. Mooncast also leads on in-app purchases (none vs 1) and update cadence (every 11 days vs every 4 months). UV Index's advantage is price ($2.99 vs $3.99). On rating, ads and chart position 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

Mooncast costs $3.99 and UV Index $2.99 up front. UV Index sells 1 one-off in-app purchase. Mooncast asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Mooncast against 4.9 for UV Index. That said, the two scores are not equally well evidenced: Mooncast has 3.6K ratings behind it against 11, so its average is the more settled of the two. Written reviews are what separate them: 91% of Mooncast's written reviews are positive against 21% of UV Index's.

UpkeepUpdate frequency

Mooncast ships an update every 11 days, UV Index every 4 months. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.

Scorecard8 real differences · 3 level
Mooncast versus UV Index: the parameters behind the verdict, then further details
ParameterMooncastUV Index
Price$3.99$2.99 — better
Rating4.8 (3.6K ratings)4.9 (11 ratings) — better
Positive reviews91.2% of reviews — better21.1% of reviews
Number of ratings3.6K — better11
Update frequencyEvery 11 days — betterEvery 4 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterPaid
Best chart rank#88#42 — better
DevicesiPhone, iPad, Mac, Apple TV, Apple Watch — betteriPhone, iPad
Requires iOS18.0 — better26.0
Further details — not scored
Size64 MB6 MB
Age rating4+4+
DeveloperMathieu RouthierLionsApp di Nallbati Elton

Customer experience

Mooncast

All ratings3,631 ratings
Positive96.8%
Neutral1.8%
Negative1.4%
Written reviews307 reviews
Positive91.2%
Neutral2.6%
Negative6.2%

UV Index

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews19 reviews
Positive21.1%
Neutral5.3%
Negative73.7%

Bugs and requests

Mooncast

Reported bugs

2 issues
  • 🐛 Alarms don't always work
  • 🐛 Incompatible with older devices

Requested features

4 requests
  • 💡 Show what zodiac sign the moon is in
  • 💡 Add moon rise and set times
  • 💡 Allow setting custom reminder times
  • 💡 Add a monthly calendar view

UV Index

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Mooncast

No in-app purchases

1 purchases

UV Index

One-time1
  • UV Pro$2.99

Questions

Is Mooncast free?
Mooncast costs $3.99, with no in-app purchases.
Is UV Index free?
UV Index costs $2.99, and also offers in-app purchases.
Which has better reviews, Mooncast or UV Index?
UV Index is rated higher. Mooncast averages 4.8 out of 5 from 3.6K ratings, while UV Index averages 4.9 from 11 ratings.
Do Mooncast or UV Index have ads?
Neither Mooncast nor UV Index shows ads.
Which is updated more often, Mooncast or UV Index?
Mooncast ships an update every 11 days, and UV Index every 4 months. Most recently, Mooncast was updated on November 6, 2026 and UV Index on November 1, 2026.
Which is more popular, Mooncast or UV Index?
Mooncast currently peaks at #88 in the App Store charts, and UV Index at #42. Chart position reflects recent download velocity rather than total install base.

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