Umbra Sphere vs HexStep

Umbra Sphere is a proof-of-concept app, we use a geospatial technology called "S²Geometry" to store the locations you've visited, identify which country or region they belong to and present them on a map as cleared shadows (umbra). S²Geometry is a geocoding system that divides the Earth's surface into "cells" ranging from 85 million square kilometers to 0.5 square centimeters. These cells are converted into 64-bit integers using the Hilbert curve. Compared with traditional latitude-longitude coordinate system and map projections, S²Geometry is less intuitive, but it avoids significant distortion, delivers globally consistent accuracy, and offers extraordinary indexing and querying performance. With these advantages, Umbra Sphere converts traces into a series integers and stores them in database with appropriate indexes to generate umbra fast in real-time for displaying. It also provides statistical features, presenting the areas of countries or regions you've visited on "visa" cards. Additionally, Umbra Sphere also features a simple S²Geometry visualization tool, allowing you to view S²Geometry cells and their corresponding integer IDs directly on the map. ● Umbra Sphere supports importing these file types: • GPX and KML trace files • Sync files and snapshot files from Fog of World • Backup CSV files from StepLife ● Privacy We respect privacy, and simply do not collect any of your data. All your data are stored in your device. Umbra Sphere does not provide sync feature, you can manually export and import your data.

Watch your map fill in. HexStep turns the places you go into a map of hexagons that stays with you. No check-ins, no photo tagging. Walk, ride or drive through a hex and it stays on your map. HexStep records while the app is open. Turn on Background Tracking and allow location access "Always" to keep recording while you use other apps or your phone is locked. SEE HOW MUCH YOU'VE EXPLORED • Hexes are recorded anywhere in the world • See your coverage of countries and their regions, down to cities or neighborhoods where boundary data is available (detail varies by country) • Switch between places explored and hexes explored YOUR EXPLORATION, DAY BY DAY The Exploration calendar keeps every day you explored. Days you claimed new hexes are brighter than days you only revisited. LEVEL UP AND COMPETE • Every new hex earns points • Climb five tiers: Wanderer, Regular, Local, Explorer, Human GPS • Today, this week, this month and all-time leaderboards, ranked by the hexes you claim SHARE YOUR MAP Make a story-ready card of your map for Instagram, iMessage or anywhere else. HEXSTEP PLUS One-time purchase. No subscription. • Map Replay: watch your map fill in day by day and save it as a video • Visit intensity: places you return to appear stronger on the map • Tap any hex to see when you first claimed it, how many days you've visited and your last visit • Pick any day on your calendar and see where you went YOUR DATA No account needed. Without an account, your map is saved only on your iPhone. Sign in with Apple or Google to back up your hexes, points and calendar to your HexStep account and restore them on a new iPhone. Signing in is also required to join the leaderboards and buy Plus. You can export your data or delete your account anytime in Settings. Start walking. Your map is waiting.