Bubble Level vs Sino

Bubble Level is an accurate and simple to use spirit level for your iPhone, iPad and iPod touch. It's great for aligning picture frames or for angle measurements. Features: ◉ Measure the level of any surface. ◉ It can be calibrated with the click of a button and the calibration is saved automatically. ◉ It's accurate to one tenth of a degree. ◉ Full Retina support. This tool can be used for: ◉ Picture frame alignment ◉ Measuring angles and slopes ◉ Checking the surface level of tables, shelves or any other object ◉ Measuring the inclination of a ship, aircraft or car ◉ Roof pitch calculation ▶ Calibration instructions: - To calibrate the level, hold the device upright against a reference surface ( landscape mode with the button to the left ) and press the red Calibrate button. Download this app today!

Sino is a simple test tone generator. Use it to test your speakers, headphones, studio monitors or PA system. In portrait mode, use one big dial to slide through the whole audible frequency spectrum single-handedly. In landscape mode, two sliders for frequency and amplitude control make it easy to swipe with more precision. Choose between a sine oscillator and band filtered pink noise. Send the signal to the left, right or both channels of your stereo setup. With its precise frequency slider, you can find problematic frequencies in your room easily.