Batphone vs YetiFlight

Batphone is a research tool which demonstrates a method determining your location within a building. It's meant to be an alternative to GPS or iBeacon, and it works by using the microphone to record room ambience. These acoustic room fingerprints are used to recognize previously-tagged rooms when they are revisited. For comparison, it also shows the position retrieved from Location Services, which determines your coordinates using radio signals from GPS satellites, wifi and cellular base stations. Our experiments have shown that Batphone's acoustic method is more accurate than the radio method. Try it for yourself and let us know what you think! Fore more details, please see the report titled "Indoor Localization without Infrastructure using the Acoustic Background Spectrum" which was presented at the 2011 MobiSys conference.

Bring your flight planning, aviation weather, charts, training, and pilot tools together with YetiFlight. Whether you’re preparing for a lesson, reviewing a route, or building your aviation knowledge, YetiFlight keeps useful resources within reach. Designed for student pilots and experienced aviators, it brings the different parts of flight preparation and learning into one convenient app. FLIGHT PLANNING AND CHARTS Prepare for your next flight with access to flight planning resources and aviation charts. Explore your route and review the information that supports your planning process. Keep planning and training close together as you connect what you learn on the ground with the flights ahead. AVIATION WEATHER Access aviation weather as part of your flight preparation. Review conditions alongside your planning resources and make weather awareness part of your routine, whether you’re getting ready for a local lesson or planning a cross-country flight. STRUCTURED FLIGHT TRAINING Give your study sessions direction with flight training resources and a Private Pilot Flight Training Syllabus. Work through lessons, review required reading, and use lesson checklists to prepare for time with your instructor. Training features include flight profiles, instructor notes, and sign-off sections to support an organized approach to learning. Review material before a lesson and return to it afterward as you build your understanding. ESSENTIAL PILOT TOOLS Find aviation tools and reference resources in a dedicated Pilot Tools section. Bring useful information into your everyday study and preparation routine, with convenient access from the same app you use for planning and training. YOUR FLIGHT HANGAR Keep aircraft information close at hand with the Flight Hangar. Use aircraft resources alongside your planning and training activities to stay familiar with the airplanes you fly and study. BUILT FOR YOUR AVIATION JOURNEY YetiFlight brings together resources for different stages of your flying journey: • Student pilots preparing for upcoming lessons. • Private pilot learners working through structured training. • Pilots reviewing aviation knowledge and planning resources. • Aviators who want weather, charts, aircraft information, and pilot tools in one place. Move between learning, planning, and aircraft resources as your needs change. From a focused study session to preparation for your next flight, YetiFlight helps you keep your aviation routine organized. YETIFLIGHT MEMBERSHIP YetiFlight is free to download. Access to subscription features requires an active YetiFlight membership. Monthly and annual subscription options are available through in-app purchase. Review current pricing and subscription details in the app before purchasing. Plan your next flight. Prepare for your next lesson. Keep learning with YetiFlight. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/