Old Satellite Map JAPAN vs E6BJet

A map app that displays aerial photographs of Japan taken in the 1970s. You can compare today's map side by side with 1970s aerial photography. [Features] - Displays Google Maps and 1970s aerial photographs side by side - Detects and shows your current location - Switch to full screen to explore the 1970s map - Switch between 9 generations with the year dial: 1928 / 1936-1942 / 1945-1950 (US Army) / 1961-1969 / 1974-1978 / 1979-1983 / 1984-1986 / 1988-1990 / 2007-2012 - Coverage differs by year and location. The app automatically detects which years are available at the point you are viewing (1974-1978 covers the whole country; 1928 covers the city of Osaka; 1936-1942 covers Tokyo's 23 wards and the Osaka area) [Subscription] - To hide ads, please purchase the subscription at "Purchase" menu in this app. - When changing device, you can restore it for free at "Purchase" menu in this app only if you use the device with the same Apple ID as when you purchased it. - To cancel your subscription, you can cancel it in "Settings app" > "Your name" > "Subscriptions". [Source] - The historical aerial photographs are provided by the Geospatial Information Authority of Japan (GSI). [Terms of service] https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

E6BJet does what most professional aviation slide-rules do, and adds advanced features for professional pilots flying modern jet aircraft: QNH-QFE conversion, precision temperature corrections to altitudes/heights, crossover altitude determination, and accurate weight/volume conversion for kerosene, wide-cut, and avgas fuels using actual density.  E6BJet also computes turn radius, diameter and circumference, along with turn rate. Thumbwheels/sliders are used to enter values, which is much faster than aligning discs, or typing in numbers. E6BJet can determine past, present and future sunrise/sunset and civil twilight times, for any location on Earth, between years 1900 and 2999. A user-expandable database of aerodrome locations is provided. An appearance similar to modern aircraft flight guidance panels allows instant “what-if” calculations, and keeps all calculation parameters in view simultaneously. Results are shown in most commonly-used aviation units at the same time, eliminating time spent on conversions. E6BJet can make full use of the altimeter function most iPhones provide, and act as a baro-recorder. E6BJet allows quick flight planning calculations for any aircraft, from sport aeroplanes to airliners, and handles calculations well into the supersonic jet range. It is ready for the next-generation of pilots and aircraft. No subscription required. Fully functional in airplane-mode. No in-app purchases needed. No analytics or tracking.