Science Tools vs WristBuddy

Science Tools is an interactive experiment box for students, teachers, and science lovers. Explore double-slit interference, double pendulum chaos, optics, orbital mechanics and more with hands-on controls and instant visuals. Works offline and is perfect for class demos and self-study. Upgrade to Pro to unlock all tools and future content.

Know how your phone is doing — without picking it up. WristBuddy lives on your Apple Watch and shows what your iPhone is doing right now: battery, charging, Wi-Fi and cellular, motion, silent mode, Focus, lock state, air pressure, and thermal state — all glanceable from your wrist. SOUND FAMILIAR? • Phone charging in another room? Glance at your wrist and unplug it when it's ready. • About to walk into a meeting? Know it's really on silent without pulling it out under the table. • Charging it inside a bag, or tethering a hotspot? Keep an eye on its temperature and catch it running hot. • Left your phone away on purpose? Stay aware of anything urgent without breaking the moment. WHAT'S FREE • Battery range (Below 20% / 20-50% / 50-90% / Above 90%) • Watch dashboard with stale-snapshot indicator • "Hey Siri, ring my iPhone with WristBuddy" (beta) UNLOCK PRO (pay once, yours forever) • Exact battery percentage and charging state • Wi-Fi and Cellular connectivity (separate rows), with network generation (5G / LTE) • Motion detection — is the iPhone being touched right now? • Silent and Focus mode • Lock state — is the iPhone locked right now? • Distance from your iPhone (UWB; iPhone 11+ paired with Apple Watch S6+) • Air pressure — barometric pressure (hPa) from your iPhone's barometer • Thermal state — is your iPhone running hot while it charges or works? (Normal / Fair / Serious / Critical) • Find My Watch (beta) — buzz your Apple Watch from your iPhone • Apple Watch screen on iPhone — see your Watch's battery from your iPhone • Reorderable status rows — drag to reorder which features show on your Watch • Lock Screen Live Activity — both batteries and link state pinned to your iPhone Lock Screen and Dynamic Island • Get iPhone Status shortcut for Shortcuts automations WHY WRISTBUDDY • Pay once. Never a subscription. Never ads. • No account. No sign-up. • No cloud. No analytics. No tracking. No third-party SDKs. • Everything stays on your iPhone and Apple Watch. • Privacy nutrition label: Data Not Collected — every category unchecked. PRIVACY BY DESIGN WristBuddy uses Apple's built-in WatchConnectivity framework, so your iPhone and Apple Watch talk directly to each other over Bluetooth or local Wi-Fi. No data ever leaves your devices. There is no WristBuddy server, because there isn't one. REQUIREMENTS • iPhone running iOS 16 or later (iOS 16.1+ for the Lock Screen Live Activity) • Apple Watch running watchOS 9 or later • UWB distance feature requires iPhone 11+ and Apple Watch Series 6+ • Dynamic Island layout requires iPhone 14 Pro or newer Open the iPhone app once, then forget about it — the iPhone responds in the background. Open the Watch app to see everything at a glance.