Stars Blinker vs Easy Audio Spectrogram

Stars Blinker is aimed to anyone takes Deep-Sky pictures. The app allows to compare two images of the same area taken at different times, with the same or different instruments. Changes, are highlighted by the blinking of any object (star, asteroid, etc.) that only appears in one of the images or has changed position or brightness between a shot and the next. After shooting pictures of stars clusters, nebulae, galaxies and so on, often you would check if there are changes compared to the “normal" appearance of the photographed area. To do it, usually you have to search for a picture (or map) of the same area and check brightness and location of each object. Unless you have a blink comparator that, alternating the vision of two shots obtained at different times, allows to detect and highlight changes or transient phenomena (comets, variable stars, novae and supernovae, asteroids etc.). In the comparator, the sample image and the reference are shown alternately after being aligned with each other. If an object is present in only one of the pictures, it blinks and can be easily found and marked. Instead, if an object has changed position between two shots, during the animation it bounces back and forth, showing the path traveled. With Stars Blinker you can: - load pictures from the local Photo Gallery or from your iCloud; - easily align the two images: just mark the same three stars on each picture and press a button: the sample image is rotated, resized and moved to overlap the reference picture; - use images made with different instruments (I.e. comparing your picture with snapshots taken from online maps and catalogues); - manually refine alignment; - adjust blinking time interval; - invert colors to compare picture in negative; - zoom and pan the animation to frame a specific area or to examine in detail the images; - subtract Reference image from Sample to emphasize any changes; - insert a mark to highlight the position of a Transient; - add labels to report subject, date and time of shooting etc.; - save animations as short movies in your local Photo Gallery.

Easy Audio Spectrogram is a simple real-time audio visualizer for microphone input. It shows live spectrogram and frequency spectrum views, helping you explore voices, instruments, music, room noise, and everyday sounds. The app is built around readability. Instead of adjusting gain values in the blind or fight a fixed color range, Easy Audio Spectrogram lets you adjust the graph’s dynamic range in real time. Use the live spectrum display as a guide, drag the color scale to the range you care about, and instantly get a clearer spectrogram. For music and voice, the app includes a note-based frequency scale and real-time pitch detection, making it easier to see sung notes, instrument pitch, harmonics, and resonance as they happen. The interface is minimal and comfortable to use in any orientation, even upside down. Text and icons rotate, but controls stay where they are, so the app remains easy to use whether the phone is in your hand, on a table, or pointed toward a sound source. You do not have to understand what's an FFT to use this app, the default setting works well and engineering settings have been translated to understandable concepts. You can save clean spectrogram screenshots directly from the app, without the buttons covering the image and without pressing hardware button combinations. This app is free to use, free of pop-ups or advertisement banners, use it to explore music or the science of acoustics. Additional Features: -Noise profile removal, hold the button to record a profile, release to activate. -Analyze harmonics in real time with multi-touch. -Psychoacoustic filter to make the graph reflect perceived sound signature rather than flat physical reality. -Optimized performance for many hours of use without heating up your device or draining the battery.