DifCal vs iWrite

Calculate diffraction angles for a particular crystal with a defined orientation matrix. New crystals can be added to the database. Energy/wavelength can be changed. Currently knows about 4-circle, Z-Axis and Theta-Theta diffractometers as well as 2-circle, powder and amorphous diffraction modes. Current crystals include silicon, diamond, GaAs, Muscovite (mica), graphite, many 3-5 and 2-6 crystals. There are separate screens for setting the crystal (or creating a new one), defining the orientation matrix, defining the diffractometer mode, and calculating either angles, given h,k,l, or hkl given a set of angles. With the larger screen of the iPad all the controls are visible on a single page.

iWrite – Learn ABC Letters & 123 Numbers Help your child build handwriting confidence with iWrite, a fun and interactive learning app designed for toddlers, preschoolers, kindergarten children, and early learners. Children practice tracing uppercase letters, lowercase letters, and numbers through engaging activities that make learning enjoyable. Colorful visuals, friendly guidance, and rewarding interactions help children develop essential early writing skills at their own pace. Whether your child is learning the alphabet for the first time or practicing number writing, iWrite provides a safe, educational, and distraction-free learning experience. LEARN TO TRACE LETTERS Practice writing the complete English alphabet with easy-to-follow tracing guides. Children can learn: - Uppercase Letters A–Z - Lowercase Letters a–z - Correct Stroke Order - Letter Formation - Writing Practice Guided tracing helps children develop confidence while learning proper handwriting techniques. LEARN TO WRITE NUMBERS Practice writing numbers through simple tracing activities. Children learn: - Numbers 0–9 - Correct Writing Order - Number Recognition - Counting Preparation - Early Math Skills FUN LEARNING THROUGH PLAY Designed especially for young children. Features include: - Bright Colorful Interface - Large Child-Friendly Buttons - Smooth Tracing Experience - Simple Navigation - Positive Encouragement - Rewarding Animations Children stay motivated while learning through play. BUILD EARLY LEARNING SKILLS iWrite helps children develop: - Handwriting Skills - Letter Recognition - Alphabet Knowledge - Number Recognition - Pencil Control - Fine Motor Skills - Hand-Eye Coordination - Concentration - Early Writing Confidence PERFECT FOR - Toddlers - Preschool - Kindergarten - Nursery - Early Learners - Homeschool - Classroom Practice SAFE FOR CHILDREN Designed with families in mind. - No Ads - No Account Required - Offline Learning - Child-Friendly Interface - Easy Navigation - Safe Educational Experience WHY PARENTS LOVE IWRITE - ABC Letter Tracing - Number Tracing - Handwriting Practice - Preschool Learning - Kindergarten Activities - Educational Games - Beautiful Design - Easy for Kids - Fast and Lightweight - Offline Learning Help your child develop strong handwriting and early learning skills through fun tracing activities designed for growing minds. Download iWrite today and make learning letters and numbers a joyful experience.