AltosUI is the mobile ground station software for iPhones, iPads, and iPod Touch supporting the full radio telemetry product line from Altus Metrum. Using the TeleBT v4 ground station hardware, AltosUI is able to receive, display and log all telemetry from the Altus Metrum flight computer flying aboard your high power rocket. Features include: * Wireless connection to TeleBT v4 ground station hardware via Bluetooth LE * Full received telemetry is logged to files on the device. * Logged telemetry files exposed to "Files application" and "iTunes Document sharing." * Text-to-speech announcements of rocket state during flight * Text-to-speech announcements guiding you to where your rocket landed. * Select the ground station frequency matching your airframe. * Maps view of airframe location using on-line (or offline when you are out of cell tower range) map data. * Bearing, elevation and distance are given relative to mobile device, not launch pad.