ParkPing vs Graincount

ParkPing is the simplest parking meter timer on the App Store. No account, no setup, no subscription - just tap START and go. Tired of parking apps that charge $30-60 per year for a timer? ParkPing gives you everything you need for free, with a one-time $3.99 PRO unlock for power users. No recurring fees. No paywalls blocking core features. Ever. ONE TAP TO START Choose from 1h, 2h, 4h, or 8h presets, or set a custom duration. Tap START and ParkPing begins counting down immediately. A beautiful circular progress ring shows exactly how much time remains, changing from blue to orange to red as your meter runs out. SMART REMINDERS Get a time-sensitive notification 5 minutes before your meter expires, and another when your parking time has expired. On iOS 26, ParkPing uses AlarmKit so alerts break through Silent mode and Focus - you will never miss your parking expiry, even if your phone is on silent. FIND MY CAR Save your parking location with one tap. When it is time to leave, open the map and get turn-by-turn directions back to your exact spot. ParkPing is your personal car finder - no more wandering around looking for your vehicle. Works for street parking, garage spots, and parking zones. LIVE ACTIVITY & DYNAMIC ISLAND See your parking countdown right on the Lock Screen and Dynamic Island. No need to open the app - just glance at the timer ring and know exactly how much time you have left. HOME SCREEN WIDGET Add the ParkPing widget to your Home Screen for quick access to your active timer. See remaining time at a glance without opening the app. SIRI SHORTCUTS Start a parking timer hands-free. Just say "Hey Siri, I parked with ParkPing" and your timer starts instantly. Perfect for when your hands are full. PARKING HISTORY Every parking session is saved automatically. View your history grouped by day, see total time parked, and track your weekly parking habits at a glance. STREET SWEEPING REMINDERS (PRO) Set weekly reminders for street sweeping days so you never get a ticket again. Choose the days and time, and ParkPing will alert you the night before. On iOS 26, sweeping reminders use AlarmKit to make sure you never miss them. PRO UNLOCK - ONE TIME PURCHASE ParkPing is free to use with one active timer (up to 2 hours) and recent history. PRO unlocks unlimited durations, save location, find my car with directions, full history, and street sweeping reminders - all for a one-time $3.99 purchase. No subscription. No recurring fees. Pay once, use forever. PRIVACY FIRST ParkPing collects zero data. No analytics, no tracking, no ads. Your parking history stays on your device. No account required. KEY FEATURES: - One-tap parking timer with presets - Time-sensitive notifications (5-min warning + expiry) - AlarmKit alerts on iOS 26 (breaks through Silent mode) - Circular countdown ring with color-coded urgency - Live Activity and Dynamic Island support - Home Screen widget - Find My Car with map and directions - Parking history with daily stats - Siri shortcuts (hands-free timer start) - Street sweeping reminders (PRO) - One-time PRO unlock ($3.99) - no subscription - No account, no tracking, no ads Download ParkPing today and never worry about parking meters again.

Graincount: Microstructure is a planar grain-size worksheet that keeps a human at the eyepiece. It opens on a labeled synthetic worked example, so the whole workflow is visible before you import anything of your own. Does it segment grains for me? No, and that is deliberate. You import a micrograph as immutable evidence, then place, classify, and weight every intercept crossing or grain tally yourself; the app's job is geometry, arithmetic, and record-keeping, never automated detection. How do my marks become a grain size? A two-point calibration against a feature of known length (nm, um, or mm) fixes the scale. Accepted marks on drawn intercept lines pool into a Heyn-style mean intercept, while counts inside planimetric frames yield grains per square millimetre and an equivalent-circle diameter, with sample standard deviation reported across fields. Will the number survive an audit? Every commit becomes an immutable revision: the snapshot is canonicalized, hashed with SHA-256, and chained to its parent. You can inspect any revision's diff, restore an older one as a new revision, and export the worksheet as a project package, CSV, or PDF that states its own limitations. Everything computes and stays on your own device, and one purchase covers the app for good - no subscription meter running.