Statistics Calculator Plus vs KORAKU

Statistics Calculator — the fastest way to analyze your data on iPhone and iPad. Whether you're a student tackling homework, a teacher preparing examples, or anyone working with numbers, Statistics Calculator gives you instant, accurate results — just paste your data and everything computes in real time. WHAT IT CALCULATES Enter any set of numbers and instantly see: • Count, Sum, Minimum, Maximum • Mean, Median, Mode • Variance and Standard Deviation • Q1, Q2, Q3 and Interquartile Range (IQR) LEARN HOW IT WORKS — STEP BY STEP Tap any result to see the full calculation broken down into simple, easy-to-follow steps. Perfect for students who want to understand the math, not just get the answer. VISUALIZE YOUR DATA An interactive histogram chart shows the shape of your distribution at a glance. Adjust the number of bins (5 to 30) and watch the chart update instantly. A built-in frequency table lists every unique value and how often it appears. FLEXIBLE DATA INPUT Paste data from spreadsheets, type numbers manually, or use any separator you like — spaces, commas, tabs, or line breaks all work. The app silently ignores invalid entries so you never have to clean your data first. RANDOM DATA GENERATOR Need a test dataset fast? Generate up to 10,000 random values in seconds. Control the range, choose integers or decimals, and set the precision — great for classroom demos and practice problems. BUILT FOR STUDENTS AND EDUCATORS • Results update live as you type • Adjustable decimal precision from 2 to 16 places • Clean, distraction-free interface designed for focus • Handles datasets up to 10,000 numbers with ease REFERENCE BUILT IN Not sure what IQR means or how variance is defined? The built-in Reference page explains every statistic and formula in plain language — no internet connection needed. Statistics Calculator is ideal for high school and university students, teachers, data analysts, researchers, and anyone who works with numbers regularly. Thanks for your support! Visit nitrio.com for more great apps for your iOS devices.

KORAKU is an interactive educational app that visualizes how light behaves in real time. Bend rays with lenses and mirrors, overlap light as a wave, and explore color and photons to connect the equations with what you see. Developer: Fuji Bit Inc. KORAKU is the optics edition of the "-raku" physics simulation series. It turns the optics of school and university physics into moving pictures, not just formulas. 12 simulations in 3 categories: - Rays & Images - Lens: Trace rays through convex and concave lenses. Change the focal length, object distance and height to see the image switch between real and virtual, inverted and upright. Explore 1/f = 1/a + 1/b. - Mirror: Switch between concave and convex mirrors. Move the radius R and object distance a to see how the image changes around the focal point F and center of curvature C, and why a virtual image appears behind the mirror. - Eye & Glasses (new): See the cornea and lens focus an image on the retina. Choose a normal, nearsighted or farsighted eye and change the viewing distance, glasses power (diopters) and accommodation to see where the image forms and how blurry it looks. One tap sets matching glasses. - Prism: Watch white light split into a spectrum. Change the apex angle, angle of incidence and refractive index to see dispersion bend each color differently, with the deviation and minimum deviation. - Optical fiber: See light travel by total internal reflection. Change the launch angle and refractive indices to explore the critical angle, numerical aperture (NA) and when light leaks into the cladding. - Light as a Wave - Diffraction grating: Change the number of slits, spacing and wavelength to find the bright lines at d sin(theta) = m lambda, and watch them sharpen as slits are added. - Thin film: Recreate the colors of soap bubbles and oil films. Change the thickness, refractive index and angle to shift the bright and dark wavelengths. - Polarization: Rotate a polarizer and an analyzer to see Malus's law, I = I0 cos^2(theta): brightest at 0 and 180 degrees, blocked at 90. - Color & the Nature of Light - Color mixing: Compare additive mixing of light (RGB) with subtractive mixing of paint (CMY) using three sliders. - Rainbow: Follow sunlight as it refracts into a raindrop, reflects inside and refracts out. See why the primary bow appears about 42 degrees from the antisolar point, the secondary about 51 degrees, with the colors reversed. - Blue Sky & Sunset (new): See sunlight scattered in the atmosphere. Switch between Rayleigh scattering (proportional to 1/lambda^4) and Mie scattering (cloud droplets, haze), and change the sun altitude and air density. As the air mass grows, the sky and sun turn from daytime blue to sunset colors. - Photoelectric effect: Shine light on a metal and watch electrons fly out. Change the frequency, intensity and work function to explore E = hf, Kmax = hf - W and the threshold frequency f0, with the visible and UV bands marked. Features: - Clean, modern design (dark and light themes) - Home screen organized by category - Tips and a play button in the control panel - Parameter sliders with results that update in real time - Legends and labels for every symbol and colored ray on screen - An explanation sheet with formulas for every simulation - In landscape, the canvas and control panel are shown side by side - Supports larger text sizes - VoiceOver reads out each screen's result (real or virtual image, total internal reflection, and more) - 73 languages including English and Japanese, following your device language - No sign-in: start exploring right away Price: - Free - In-app purchases: none - Subscriptions: none - Ads: a banner ad by Pangle at the bottom of the screen The "-raku" educational app series: - SUUGAKU - Mathematics - BUTURAKU - Mechanics - DENRAKU - Electromagnetism - HARAKU - Waves - KORAKU - Optics