Tag Archives: index

Weather Calculators and Converters


Available in the App Store

* Featured by Apple in the United States, Canada, and United Kingdom in both iPhone & iPad > Weather > What’s Hot

The Heat Index and Wind Chill Factor Calculators now display automatic weather calculation based on iPhone/iPad localization features with available internet access. Just press the Fetch button.

The Weather Calculators and Converters app will calculate weather conditions and do conversion between weather units which are input. Entries may be Fahrenheit, Celsius, Kelvin, MPH, KPH, Knots, inches of Mercury (in HG), millibars (hPA), millimeters of mercury (mm HG), meters, feet, etc. depending on the type of calculator.

• Send your calculations by mail
• Universal App (iPhone, iPod Touch, and iPad)
• Retina Display graphics
• Fast app switching
• Automatically Saves Your Inputs

The following twelve calculators and converters are included

– Heat Index
– Wind Chill
– Relative Humidity & Wetbulb
– Vapor Pressure
– Mixing Ratio
– Virtual Temperature
– Station Pressure
– Altimeter Setting
– Pressure Altitude
– Wind Speed Converter
– Temperature Converter
– Pressure Unit Converter

The results can also be emailed through the iphone’s email application using an automatically filled-in email template.

Simply punch in your raw numbers and press Calculate to get the answers to the formulas. It is as simple as that.

This is a Universal App which will run on the iPhone, iPod Touch, and iPad.

Available in the App Store

This app is available for a discount to Apple-approved Education institutions through the Apple’s Volume Purchase Program.

Heat Index and Relative Humidity Calculator


Available in the App Store

This is a Universal App which will run on the iPhone, iPod Touch, and iPad.

* Featured by Apple in ‘What’s Hot’ in 76 countries(1)

* Now displays automatic weather calculation based on iPhone/iPad localization features with available internet access. Just press the Fetch button.

The Heat Index and Relative Humidity Calculator is a tool for measuring the perceived temperature and relative humidity. Because the body normally cools itself by perspiration, when relative humidity is high, the evaporation rate is reduced, and heat is removed from the body at a lower rate causing it to retain more heat than it would in dry air.

Relative humidity may be defined as the ratio of the water vapor density (mass per unit volume) to the saturation water vapor density, and in the case of this iPhone App it is expressed as a percentage. The air temperature and dew point can be entered as Fahrenheit or Celsius.

The calculator will compute both the relative humidity and the heat indexThe calculator will compute both the relative humidity and the heat index when the values for the air temperature and dew point are entered.

The results can also be emailed through the iphone’s email application. The application is completely compatible with the iPhone OS 3 and later, as well as the iPod Touch.

The heat category is a measurement taken from NOAA’s National Weather Service Heat Index Chart and is used to assist in determining how much caution should be exercised when outdoors for any period of time.

The calculator is the most effective when the temperature is at least 80 °F / 26 °C and the relative humidity is at least 40%.

(1) Argentina, Armenia, Austria, Belgium, Botswana, Brazil, Bulgaria, Chile, Colombia, Costa, Rica, Croatia, Czech, Republic, Denmark, Dominican, Republic, Ecuador, Egypt, El Salvador, Estonia, Finland, Greece, Guatemala, Honduras, Hong, Kong, Hungary, India, Indonesia, Ireland, Israel, Jamaica, Jordan, Kazakhstan, Kenya, Kuwait, Latvia, Lebanon, Lithuania, Luxembourg, Macau, Macedonia, Madagascar, Malaysia, Mali, Malta, Mauritius, Moldova, New, Zealand, Nicaragua, Niger, Norway, Pakistan, Panama, Paraguay, Peru, Philipines, Poland, Portugal, Qatar, Romania, Saudi, Arabia, Senegal, Singapore, Slovakia, Slovenia, South, Africa, Sri, Lanka, Sweden, Taiwan, Thailand, Tunisia, Turkey, Uganda, United Arab Emirates, United States, Uruguay, Venezuela, and Vietnam

Available in the App Store

This app is available for a discount to Apple-approved Education institutions in the United States. Please contact Apple for further details.

Langelier Saturation Index Calculator


Available in the App Store

The Langelier Saturation Index computes the Langelier Saturation Index, a calculated number, to predict the calcium carbonate stability of water to determine equilibrium. This helps you determine the scaling potential of the water. A negative LSI indicates that the water is corrosive to steel.

The app also features a short interpretation of the the LSI value, and water temperature can be entered as Fahrenheit or Celsius.

This app features:

• Send your calculations or conversions by email
• Universal App (iPhone, iPod Touch, and iPad)
• Retina Display graphics
• Fast app switching
• Automatically Saves Your Inputs
• Latest version of iOS is supported
• iPhone 6, 6+, 5 screens and the original 3.5 inch screen are supported
• Export to CSV

No network connectivity required.

Available in the App Store

This app is available for a discount to Apple-approved Education institutions in the United States. Please contact Apple for further details.