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iUnit Measurement Conversion

Version 1.2

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iUnit Measurement Conversion

Black Cat Systems

Reference, Utilities

IOS
GBP 2.99


Download iUnit Measurement Conversion on the Appstore





iUnit is a powerful yet easy to use unit conversion app. You can convert between 1650 different units in 57 categories quickly and easily.

iUnit converts between the following types of units:

Acceleration
Acoustic impedance
Angle
Angular Acceleration
Area
Basis Weight
Capacitance
Charge (Electrical)
Computer Storage
Concentration
Conductance (Electrical)
Corrosion Rate
Data Transfer Rate
Density
Diffusitivity
Distance
Electrical Conductance
Energy
Enthalpy - mass basis
Enthalpy - mol basis
Enthalpy - volume basis
Entropy
Frequency
Force
Heat Capacity
Heat Flux
Heat Rate
Heat Transfer Coefficient
Liquid Solution Concentration
Luminous Luminence
Luminous Intensity
Magnetic Flux
Magnetic Flux Density
Magnetic Field Strength
Mass
Mass Flow Rate
Molar Concentration
Mole Flow Rate
Moment-Torque
Momentum
Power
Pressure
Radiation Activity
Stress
Surface Tension
Temperature
Thermal Conductivity
Thermal expansion - linear
Thermal expansion - volume
Time
Type (printer's)
Velocity
Viscosity (Kinematic)
Viscosity (Dynamic)
Viscosity (Oil and Water)
Volume
Volume Flow Rate



Release notes


Updates for iOS 11.



iUnit Measurement Conversion screenshot oneiUnit Measurement Conversion screenshot twoiUnit Measurement Conversion screenshot threeiUnit Measurement Conversion screenshot four


The Developer Black Cat Systems also wrote the apps listed below, click the icon to visit the pages.

iUnit Measurement Conversion
iUnit Measurement Conversion

£2.99
iUnit is a powerful yet easy to use unit conversion app. You can convert between 1650 different units in 57 categories quickly and easily.

iUnit converts between the following types of units:

Acceleration
Acoustic impedance
Angle
Angular Acceleration
Area
Basis Weight
Capacitance
Charge (Electrical)
Computer Storage
Concentration
Conductance (Electrical)
Corrosion Rate
Data Transfer Rate
Density
Diffusitivity
Distance
Electrical Conductance
Energy
Enthalpy - mass basis
Enthalpy - mol basis
Enthalpy - volume basis
Entropy
Frequency
Force
Heat Capacity
Heat Flux
Heat Rate
Heat Transfer Coefficient
Liquid Solution Concentration
Luminous Luminence
Luminous Intensity
Magnetic Flux
Magnetic Flux Density
Magnetic Field Strength
Mass
Mass Flow Rate
Molar Concentration
Mole Flow Rate
Moment-Torque
Momentum
Power
Pressure
Radiation Activity
Stress
Surface Tension
Temperature
Thermal Conductivity
Thermal expansion - linear
Thermal expansion - volume
Time
Type (printer's)
Velocity
Viscosity (Kinematic)
Viscosity (Dynamic)
Viscosity (Oil and Water)
Volume
Volume Flow Rate...
NAVTEX Pad
NAVTEX Pad

£2.99
NAVTEX Pad lets you view NAVTEX and Radio Teletype (RTTY) marine weather transmissions on your iPhone, iPod Touch, or iPad. Just set it near a radio (or for better quality decoding, connect a cable from the radio's audio output jack to the microphone jack), tune in a NAVTEX frequency (usually 518 kHz), and watch the transmissions.

NAVTEX weather and marine safety messages are transmitted from dozens of sites around the world. Now you can display these messages without buying a dedicated NAVTEX receiver.

Both BAUDOT and ASCII RTTY can also be decoded. The shift and baud can can be selected from the standard values.

You can also save your received text to view later, or transfer to your computer via iTunes.

Schedules of upcoming NAVTEX transmissions are available within the app, so you'll never miss one.

Visit the support page for step by step instructions for using the app: http://www.blackcatsystems.com/ipad/iPad_NAVTEX_Pad_FAQ.html

Buy your copy of NAVTEX pad today, and never be without up to date marine weather information again....
ACARS
ACARS

£2.99
Want to display ACARS transmissions, without using a bulky computer? ACARS lets you view ACARS aircraft transmissions on your iPad, iPhone, and iPod Touch.

A radio/scanner capable of tuning the 118-136 MHz aircraft band is required. Just set it next to the radio's speaker, tune in an ACARS frequency, and watch the decodes. Or, for even better reception, use a pair of earbuds, plugged into the radio’s headphone jack, rather than the internal speaker.

You can save decoded ACARS packets to a file to view later, or transfer to your computer via iTunes.

Aircraft model information for many planes in a built in database is displayed along with the decoded packets. You can also add your own plane information to the database.

Packet fields are color coded on iOS 6 and later.

Buy your copy right now, and start decoding and displaying ACARS transmissions in minutes....
Sound Byte Cart Machine App
Sound Byte Cart Machine App

£4.99
Looking for a way to play sound clips at a theater or sporting events, as a DJ, or at other events? Don’t want to lug a computer around with you? With Sound Byte, the so-called "cart machine" used at radio stations in the past is now available for the iPad, iPhone and iPod Touch.

Whether you're programming a radio show or amateur podcast, adding spice to the commentary at a local sporting event, controlling sound effects for a theater production, or simply organizing your personal playlist, Sound Byte lets you manage and control playback of your audio files.

Sound Byte is perfect for:

Radio, podcast and TV productions - have ads, announcements, songs and sound effects
at your fingertips.
Theater Productions - play any sound effect on cue.
Sports Events - jazz up the commentary for your home team with sound effects each time they score.

Sound Byte supports up to 20 racks of carts, or up to 1500 recordings total (420 on the iPhone/iPod). You can set the number of racks in use, so you don’t have to deal with empty, unused racks.

Using Sound Byte is easy - just tap a cart, and playback of the audio file begins.

You can set the title of each cart, as well as the background color. Optionally, you can have the app automatically change cart colors based on their state: empty, loaded, playing, and already played. Carts can also be numbered if you wish, and you can mark carts with a bright red border to make them easier to find, to play next.

Fade in and out times can be set, as well as the cut in and cut out times, the playback volume, stereo pan, and rate. The volume of carts can be set while they are playing, and you can set the volume up to 200%, in case you have some recordings that are at too low of a level for normal playback.

Carts can be set to loop a specified number of times - great for sound effects!

Carts can be set to flash a user configured number of seconds before they finish playing, so you can get ready to play the next one.

Interactions between carts can also be controlled - touching a cart to start it can optionally cause currently playing carts to stop playback or fade out. You can even set carts up to play sequentially, so once one ends, the next one starts playing.

Carts that have been played can be marked as such, as well as disabled, if you only want to play a cart once. You can also log the name and time of played carts to a text file that you can copy back to your computer to view. This log can also be viewed from within the app.

Several sizes of carts are supported, so you can display fewer larger carts to make playback control even easier.

Sound Byte plays sound files from your Music Library. Note that sound files stored on iCloud cannot be played, they must be stored on your device. (iOS6 or later)

Sound Byte also plays sound files that you have installed in the Documents folder, which you can access via the iTunes app.

Note that the screenshots are for illustration only, so you can see how the app works. Sound Byte does not come with any sound files, you'll need to supply your own.

Please see http://www.blackcatsystems.com/ipad/iPad_SoundByte_FAQ.html for a full description of how to use the app.

Buy your copy of Sound Byte now, and get complete control over playback of your sound effects and other files....
Shortwave Broadcast Schedules
Shortwave Broadcast Schedules

£2.99
Are you a shortwave radio listener (SWL) in need of an up to date set of schedules for international broadcast stations? Shortwave Broadcast Schedules is a handy app that displays broadcast schedules of about 11,000 longwave, mediumwave, and shortwave broadcast stations.

The stations are initially listed in order by frequency. You can tap a button to see which stations are on the air right now, as well as search for stations by name, frequency, time of day that they are on, or select by language, target area, or country of origin.

Stations currently on the air are displayed in bold, making it quick and easy to see which stations are on right now.

The app can keep a log of stations you have heard, with the date, time, frequency, SIO, and other notes you wish to enter. Now your device can be your personal logbook!

You can keep track of favorite stations, as well as set reminders for favorite broadcasts, so you’ll never forget about a transmission again.

Tap on a station to bring up more information about the station, such as the country of origin, target area, and programming language.

When viewing the details for a station, you can tap on the frequency, country, target, or language to get a list of all other stations with that matching value. You can also tap on Schedule to see all of the transmissions throughout the day for this station.

Updated schedules can be downloaded for free.

Visit the support page for step by step instructions on using the app: http://www.blackcatsystems.com/iphone/SWBC_FAQ.html

Get your copy of Shortwave Broadcast Schedules, and never miss listening to another of your favorite stations again.

Note: A shortwave radio is required to listen to the broadcasts....
DX Toolbox
DX Toolbox

£2.99
Are you a ham radio operator or shortwave listener, in need of up to date propagation information and solar conditions? DX Toolbox features several propagation forecasting tools, allowing you to quickly and easily estimate current HF (Shortwave) propagation conditions between any two locations in the world, and is ideal for the ham radio operator, shortwave listener, or other radio enthusiast.

Radio propagation conditions can also be estimated between any two points on the Earth. Graphs of these conditions can be generated for a given frequency or time, and MUF/LUF graphs can also be displayed.

A grayline map of the world is also available. Radio propagation between locations within the grayline region of the world is often greatly enhanced. DX Toolbox's grayline map makes it easy for you to determine where those locations are. Grayline propagation has been used by expert radio operators and DXers for years to catch elusive stations. A plot the great circle (both short and long) path between your location and another station is also displayed, as well as the beam heading and distance. The location of the currently transmitting NCDXF/IARU beacon can be displayed on the map as well.

The propagation map displays the areas of the world where your signal can be heard (or a signal can be heard from), based on the frequency, transmitter power, and current solar flux, date, and time.

Maps showing ionosonde plots of foF2, foEs, and hmF2 data from various locations around the world are available. The MUF and skip zone can be calculated based on foF2 and hmF2 values.

Aurora prediction maps for the northern and southern hemisphere are available.

DX Toolbox displays the following important solar and geomagnetic readings:

Solar Flux
A-Index
K-Index
Sun Spot Number
X-Ray Flux levels
X-Ray flares
Solar Wind
Earth's Magnetic Field
Proton and Electron Flux levels
Radio Blackout conditions
Geomagnetic Storm conditions
Solar Radiation Storm conditions

Graphs of x-ray flux readings from the GOES satellites may also be displayed.

The following radio propagation reports and forecasts are available:

WWV Geophysical Alert
27 Day Space Outlook
45 Day AP Forecast
Geomagnetic Data
Daily Geomagnetic Data
Daily Particle Data
Daily Solar Data
GEOALERT
Daily Magnetometer Analysis Reports
Hourly Magnetometer Analysis Reports
Predicted Sunspot Numbers and Radio Flux
Report of Solar-Geophysical Activity
Solar and Geophysical Activity Summary
Solar Region Summary
Weekly Highlights and Forecasts
Current Space Weather Indices
Space Weather Event Reports
Daily Space Weather Indices
Summary of Space Weather Observations
3-day Space Weather Predictions
SEC Space Weather Alerts

In addition, 21 maps of current D Layer Absorption levels are available for display.

Full documentation on how to use the app is available here: http://www.blackcatsystems.com/iphone/dx_toolbox_faq.html

Get your copy of DX Toolbox now, and you’ll always be up to date on current radio propagation conditions....
Godafoss Audio Spectrum Waterfall QRSS CW FSKCW
Godafoss Audio Spectrum Waterfall QRSS CW FSKCW

£2.99
Godafoss displays a waterfall of the audio spectrum, letting you view QRSS CW, DFCW, FSKCW, and other slow transmission speed signals. You can place your device’s microphone near the speaker or headphones of your radio to pick up the sound, or directly connect if you have an appropriate cable.

A frequency axis is displayed to the right or bottom of the screen, depending on the direction the waterfall is running.

You can pan the range of audio frequencies by touching the screen and sliding with your finger, in the same direction as the frequency axis.

You can also pinch and zoom to adjust the span of frequencies displayed, up to a maximum of 0 to 20 kHz.

If you don’t want to accidentally change the frequency range, tap the Lock button so it is highlighted. Panning and pinch/zoom will not affect the frequency range, so you don’t accidentally change them.

When first started, Godafoss defaults to an FFT size of 4K, with a Hanning window. You can change these and other settings by tapping the Setup button, and a set of controls will appear:

The first two are sliders that set the minimum and maximum audio levels for the waterfall colors. Adjust these to get the best looking display for the signals of interest. Often you want a blue background, the minimum dB slider should first be adjusted for this. Then adjust the maximum slider for the strongest signal, often it is desired to make this red or pink, but you have the flexibility to set it how you wish.

The FFT size sets the number of sound samples used to compute the spectrum. Higher values provide better frequency resolution, but update more slowly, and can smear faster signals.

The window type controls what windowing function is applied to the data before the FFT is run. The window modifies the received audio data to reduce what is called “leakage” from non periodic signals. Leakage smears the signal over a wider frequency range. Experimentation will help you find he best settings. The following windows are available:

Rectangular
Hanning
Hamming
Tukey
Cosine
Lanczos
Blackman

Speedup allows multiple FFTs to be run on the same set of audio samples, shifted slightly in time, This can be useful when a larger FFT size is required, but the signal rate demands a faster update rate on the waterfall. A speedup of 1 means no speedup is applied, a speedup of 10 means that 10 FFTs are performed on each data sample.

Finally, you can change the direction the waterfall runs, to the left, right, up, or down.

Note that making changes to any of these settings only affects newly received audio, previously received audio already displayed on the waterfall is not affected.

You can take a screenshot of the waterfall by tapping on it three times. The screen will flash to let you know the picture has been taken, and it will be saved to your Saved Photos album. Then you can share your received signals with your friends....
DGPS Decoder
DGPS Decoder

£2.99
Now you can decode DGPS (Differential Global Positioning System) beacon transmissions. DGPS stations transmit the difference between positions indicated by GPS satellite systems and the known fixed position of the station. This allows higher accuracy. DGPS transmissions are 100 or 200 baud and are transmitted on frequencies from 285 kHz to 325 kHz. Hundreds of these stations are operated by the Coast Guard and other agencies, and they can be interesting DX targets.

To use this app, you need a radio that can tune the correct frequency range, either in SSB or CW mode. Most “shortwave radios” can do this. Ideally you use a cable to feed the audio from your radio into your device, but you can also place the radio speaker near your device’s microphone, or even better yet, plug earphones into the radio, and place them next to the device’s microphone. You may need to experiment to get the best quality audio pickup, without any outside noise or distortion.

To assist with practice in setting up the app to decode transmissions, you may wish to first try decoding this recorded DGPS station, set the app for 200 baud and a center frequency of 1000 Hz: http://www.blackcatsystems.com/ipad/DGPS.WAV

A typical decoded message looks like this:

[23:24:00 08/08/16] 806 12 13 289.0 kHz Driver, VA United States 36.9633 -76.5622 306.61 km 172.711 deg

First the current UTC date and time are printed in brackets.
Then the station ID, 806 in this case, as well as the two reference IDs, 12 and 13 in this case.
That is followed by the assigned frequency, 289.0 kHz for this station. You can compare this value to what your radio is tuned to, they should match. If they don’t, then ignore this message, as it was incorrectly received. With weak signals, it is common to receive incorrect messages, because static or other interference has corrupted some of the bits. Just ignore them.
The location of the station is then displayed, the city, state, and country, followed by the station location.
Then the distance and bearing to the station is displayed, providing you have correctly set your location in the app.

You can save your decodes to a text file that you can later view, or transfer to your computer using File Sharing in iTunes. You can select which recording file to append additional text to, or create a new file....