Sonic Math vs PHVD

"Love Math More Than Ever!" A High-Speed Calculation Drill for Ages 4+ Master Addition, Subtraction, Multiplication, and Division with a fun, game-like experience! A simple and intuitive educational app designed to celebrate your child’s "I did it!" moments. 【App Features】 ● For Ages 4 to Teens: Four training modes tailored to different skill levels. ● Flexible Practice: Choose between the "Quick 10-Question" mode for a fast speed-run or the "100-Question Drill" for deep focus. ● Sharpen Your Speed: Real-time measurement and Rank displays (S to C) keep the motivation high! ● Free Play with Ads: Challenge all modes for free by watching short video ads. ● Ad-Free Option (In-App Purchase): Unlock the full version to remove ads and provide a more focused learning environment. Make math a favorite subject with daily "Sonic Math" training!

PHVD is a reference and educational tool for neonatal clinicians working with post-haemorrhagic ventricular dilatation in preterm infants. Enter serial cranial ultrasound measurements — ventricular index, anterior horn width and thalamo-occipital distance — alongside post-menstrual age, and see them plotted against published reference curves. WHAT IT DOES • Records serial measurements across post-menstrual age • Plots them against published reference curves • Shows the trend across a series of scans • Keeps everything on your device WHAT IT DOES NOT DO PHVD does not diagnose, does not recommend treatment, and does not replace clinical assessment, imaging review, or your local protocol. It is a reference aid for qualified healthcare professionals. Every output must be independently verified against the source images and your unit's guideline. PRIVACY PHVD collects no personal data. Nothing you enter leaves your device. There is no account, no login, and no analytics. A full disclaimer is presented on first launch and must be accepted before the app can be used. Reference framework adapted from El-Dib et al. (2020); reference curve from Brouwer et al. (2012).