Keuwlsoft's Apps for Android
Keuwlsoft has published over 40 apps, mostly in the
tools and audio categories. A brief summary of the apps follows:
If your Android device has an IR blaster: Create a remote control for your electronic projects, or any other device that you know the IR codes for.
Monitor strength of nearby wifi networks. Use to find a good location for your wifi hub. Or use to identify a channel with little overlap with neighbouring networks.
Control your electronic project with an Android device. This app communicates to an HC-06 or HC-05 Bluetooth module in your project. Learn electronics in a fun way or rapid prototype your new idea. Customisable drag and drop panels with various controls including buttons, switches, sliders, pads, lights, gauges, terminals, accelerometers and graphs.
Measure RSSI strength of nearby Bluetooth Low Energy (BLE) devices. Connect to get a list of Services and Characteristics from a BLE device. Read and write to Characteristics and Descriptors.
Uses the GPS sensor, magnetic field sensor and accelerometer to determine the distance and direction to a GPS waypoint. Use for geocaching, finding your car, hotel, or other locations. Store up to 500 waypoints. Import and Export waypoints as GPX files.
Uses the magnetic field sensor to report the detect magnetic flux density in Gauss or Tesla. Includes rolling graph, compass, calibration option, maximum, minimum, averaging and sound output that changes frequency dependent on the magnetic flux density.
Display scrolling messages. Up to 6 lines of text. Portrait or landscape banner. Various scroll options.
Spirit level app. Bull's eye level, roll and pitch gauges, horizontal and vertical Levels, angle gauge. Calibration feature to correct for axis miss-alignment and sensitivity.
Basic calculator with 9 digits (+2 for the x10 exponent). Add things, Subtract things etc. Looks & acts like a real hand held calculator.
Convert integers from one base to another. Binary, Octal, Decimal, Hexadecimal, or any base between 2 and 62.
Uses the magnetic field sensor to convert your device into a compass. Magnetic North, True North, bubble level, pitch gauges, heading, inclination, location.
For counting people, events, objects, sheep, etc. Count up to 8 things simultaneously.
Tests your device USB Host capability by listing the USB devices attached.
View or log the output from your accelerometer sensor. Graph data, save data, plot a frequency spectrum, view sensor specifications or turn the accelerometer output into a light or musical instrument.
A counter based on the magnetic field sensor in your device. Detect from the magnetic field in either of the X, Y, Z directions, or from the magnitude of the magnetic field, |B|.
A counter based on the gyroscope sensor in your device. The Gyroscope measures the rate of rotation about the devices X, Y and Z directions. When a specified angular velocity is passed, the counter is incremented. Graph to show angular velocity values.
A counter based on the proximity sensor in your device. The proximity sensor usually comprises an Infrared (IR) transmitter and receiver located near the speaker at the top of the phone. When a specified proximity level is passed, the counter is incremented. Graph to show proximity distance.
Turn your device into an AC magnetic field meter by using its magnetic field sensor. Measure RMS values or Fast Fourier Transform (FFT) to obtain the magnetic field frequency spectrum.
Measure displacement by double integrating the acceleration from your device's linear acceleration sensor.
Counter based on the accelerometer sensor. Detect acceleration events in either of the X,Y Z axis, the magnitude of the acceleration, or from the angles about the device's Z axis or XY plane.
Measure angles. Camera view. Horizontal and vertical plumb lines. Radians and degrees.
For measuring lengths in cm or inches.
Measure angles between two points on the geo sphere with the camera and augmented reality.
This app uses the light sensor to measure illuminance in lumens per square meter (lx) or lumens per square foot (foot candles). Features: Time graph, Averaging, Max, Min, Calibration, ...
A counter based on the light sensor in your device. When a specified light level is passed, the counter is incremented. Graph to show illuminance values.
Measure and count colors using the camera. Measure RGB (Red, Green, Blue), HSL (Hue, Saturation, Lightness) and YUV. Trigger count detection from a measured value passing a set level, or from entering a colour region specified using HSL. Set up to 100 counters.
Flashlight app with some cool features. Music mode with lights that dance in time with sounds detected on microphone. Accelerometer mode where the light changes with orientation. Hazard mode - change speed, color and blink pattern. Widget included.
Grab, tweak and store RGB color values from the Camera Preview. Suggests nearby named html colors.
Turns the Camera LED on and off. Turns the LED on when the app opens and off when it closes and has a button to toggle the LED whilst open. If the built in torch app on your device is absent or difficult to access, then this might be what you need.
Five egg timers, each adjustable up to 23 hours 59 minutes. Countdown beeps, vibration, egg hatching.
Keep time with this 10 to 310 BPM metronome. Accelerando feature for gradually speeding up or slowing down. Accent or mute beats. Change beats per bar and beat note. Up to 9 sub beats. 3 different sounds.
Operate up to 8 stopwatches simultaneously and log up to 100 lap or split times on each.
Great for board games, as a kitchen timer, or for telling the kids how long until bedtime.
Tabata is a form of high intensity interval training (HIIT). Modify the Prepare, Work, Rest and Cool Down times. Various Sound and Vibrate options. Keep fit and healthy.
Sound Pressure Level Meter. This app uses the microphone to detect sound and convert it into an SPL value. Features: Octave bands, Time graph, Averaging, Max, Min, Weighting, Calibration, ...
Frequency counter based on the microphone input. Counts when the input rises or falls past a set level and converts into into frequency or a time period. x1 to x1000 gain and 2.5 to 640 ms/div graph. AC or DC coupling, 0.1s, 1s, 10s or 100s gate time,...
Uses the audio output to generate sound pulses and then detects the echo on the microphone. The echo signal can be visualised in a map, Fourier transformed or just as the time-series waveform. Edit the pulse signal. Sample at 44.1 kHz for 0.001s to 5s. Save CSV data files.
Straightforward guitar tuner. Single screen app that starts in auto tune mode. Simply run the app, hit a string and start tuning your guitar. Tune into the orange region for a good results or green for perfection.
Guitar tuner with more professional options:
• Alternative guitar tunings.
• Shift up or down for orchestral tuning.
• Equal temperament or just intonation.
Interact with particle beams to make unique cool sounds. Change the number of notes per octave to create unique instruments. Slide along the particles beams to change octave smoothly.
Play up to 4 pianos simultaneously on one device. Notes played are highlighted on the other pianos to make teaching a new tune easy. Slide the bar below the piano to access notes from C1 to C8. Multitouch.
Guitar tuner app which uses microphone to auto detect note being played which is then indicated by the 3 rotating dials. Equal temperament and just intonation tuning options. Shift feature and pitch pipe included.
Audio spectrum analyser for your microphone. Adjust FFT size and range. Linear or logarithmic scales. Zoom & pan. Average, Min & Max traces. Snap to peak cursor. Musical note indicator. Save CSV data files.
Dual channel function/waveform/signal generator for the speaker/headphone audio output. 16 bit, 44.1kHz. Sweep, Burst, Modulation & Noise options.
Harmonicity (the harmonic to noise ratio) can give an indication of sound quality. This app uses the microphone to measure harmonicity, jitter, shimmer and the fundamental harmonic frequency.
Count claps or other sound events with this app. When the microphone sound level passes the clap detection threshold level, the counter value is increased by one.
Guide your car to the end of each track without crashing. Good timing and memory are required. 5 cars, each with 5 tracks to complete.
Design your own balance labyrinth game: draw, capture, edit and play. Carefully tilt your device to roll balls into their correct holes.