Comparison

Weather Calc vs Lunar Eclipse

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

Head to head
About

Weather Calc

This app provides pilots and weather enthusiasts with a comprehensive tool for performing various weather-related calculations. It offers conversions and computations for atmospheric pressure, temperature, humidity, wind speed, and more.

Highlights
  • Altimeter setting calculation
  • Heat index computation
  • Pressure unit conversion
  • Relative humidity calculation
  • Speed of sound display
  • Wind chill computation
  • Wind speed conversion
Features
Currently charting
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If you’re a pilot, you often need to make lots of weather related calculations. Now there’s an easy solution, as close as your iPhone. Weather Calc performs the following weather relation calculations: Altimeter Setting - compute the altimeter setting based on elevation and station pressure Cricket Temperature - just for fun! This lets you estimate the temperature based on the chirp rate of a cricket Heat Index - compute the heat index based on the temperature and relative humidity Pressure - convert between hPa, atmospheres, psi, and inches and mm of mercury (Hg) Relative Humidity - compute the wet bulb and dewpoint based on the temperature, pressure, and relative humidity Speed Of Sound - displays the speed of sound in various units, given the temperature Standard Atmosphere - compute the temperature, pressure, density, viscosity, speed of sound, and more Station Pressure - compute the station pressure based on the elevation and altimeter setting. Temperature - convert between degrees Fahrenheit, Celsius, Kelvin, and Rankine Virtual Temperature - compute the virtual temperature based on the temperature, dewpoint, and pressure Vapor Pressure - com[ute the saturated and actual vapor pressure, as well as relative humidity Wet Bulb - compute the dewpoint and relative humidity based on the temperature, pressure, and wet bulb reading Wind Chill - compute the wind chill based on the temperature and wind speed Wind Speed - convert between knots, kilometers/hour, meters/second, miles/hour, feet/second Buy your copy now, and let Weather Calc take the drugery out of weather related calculations.

About

Lunar Eclipse

Track upcoming lunar eclipses with this app. Choose to view total, partial, or both types of events. Easily add eclipse dates to your calendar and share them with others.

Highlights
  • Countdown to lunar eclipses
  • Filter by total or partial eclipses
  • Add events to calendar
  • Share event dates
  • iPad multitasking support
Features
Currently charting
Read full description

Countdown to the next total and partial eclipses of the moon. Features: - show only total eclipses, only partial eclipses or both events - add eclipse events to your calendar - share event dates via e-mail, Twitter or Facebook - displays the last eclipse for 6 hours after - support for iPad Pro and the iPad multitasking

Screenshots

Weather Calc4 screens
Lunar Eclipse4 screens

Verdict

The call

The clearest difference is review sentiment: Weather Calc at 86% against Lunar Eclipse's 0%. Weather Calc also leads on rating (4.5 vs 2.5). Lunar Eclipse's advantage is update cadence (every 6 months vs every 32 months) and iOS requirement (9.0 vs 15.6). On price, ratings volume, ads and in-app purchases 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

Weather Calc costs $0.99 and Lunar Eclipse $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Weather Calc holds the better App Store score, 4.5 against 2.5. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews point the same way: 86% of Weather Calc's written reviews are positive against 0% of Lunar Eclipse's.

UpkeepUpdate frequency

Weather Calc ships an update every 32 months, Lunar Eclipse every 6 months. The most recent releases landed on September 14, 2026 and September 21, 2026 respectively.

Scorecard4 real differences · 7 level
Weather Calc versus Lunar Eclipse: the parameters behind the verdict, then further details
ParameterWeather CalcLunar Eclipse
Price$0.99$0.99
Rating4.5 (4 ratings) — better2.5 (4 ratings)
Positive reviews85.7% of reviews — better0.0% of reviews
Number of ratings44
Update frequencyEvery 32 monthsEvery 6 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#173 — better#181
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.69.0 — better
Further details — not scored
Size4 MB4 MB
Age rating4+4+
DeveloperBlack Cat SystemsPiet Jonas

Customer experience

Weather Calc

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive85.7%
Neutral14.3%
Negative0.0%

Lunar Eclipse

All ratings4 ratings
Positive0.0%
Neutral75.0%
Negative25.0%
Written reviews8 reviews
Positive0.0%
Neutral25.0%
Negative75.0%

In-app purchases

None

Weather Calc

No in-app purchases

None

Lunar Eclipse

No in-app purchases

Questions

Is Weather Calc free?
Weather Calc costs $0.99, with no in-app purchases.
Is Lunar Eclipse free?
Lunar Eclipse costs $0.99, with no in-app purchases.
Which has better reviews, Weather Calc or Lunar Eclipse?
Weather Calc is rated higher. Weather Calc averages 4.5 out of 5 from 4 ratings, while Lunar Eclipse averages 2.5 from 4 ratings.
Do Weather Calc or Lunar Eclipse have ads?
Neither Weather Calc nor Lunar Eclipse shows ads.
Which is updated more often, Weather Calc or Lunar Eclipse?
Weather Calc ships an update every 32 months, and Lunar Eclipse every 6 months. Most recently, Weather Calc was updated on September 14, 2026 and Lunar Eclipse on September 21, 2026.
Which is more popular, Weather Calc or Lunar Eclipse?
Weather Calc currently peaks at #173 in the App Store charts, and Lunar Eclipse at #181. Chart position reflects recent download velocity rather than total install base.

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