Explore countries through interactive flags on a dynamic map. Tap to view interesting facts. Track travel progress with a pie chart showing visited countries. Add visited locations to update progress. Share travel achievements with others.
Calculate magnification and apply Barlow lens adjustments
Calculate magnification using telescope and eyepiece focal lengths. Input values in millimeters. Include 2x to 5x Barlow lens options. Perform calculations for amateur and professional astronomers. Display results directly.
The app displays Chinese and Western star charts, integrating astronomical event information and constellation stories. It offers VR, AR, and manual modes for celestial object identification and includes over 200 bilingual audio recordings.
Explore a detailed 3D model with real-time rotation and zoom. View anatomical structures layer by layer. Access CT imaging data and accurate 3D models. Share models for educational purposes. Navigate through spinal regions with interactive features.
Access real-time crime data and neighborhood safety reports. Search for local incidents and crime prevention tips. Receive alerts about nearby incidents and safety advisories. View maps with crime hotspots and community resources.
The app measures relative angles and rotation using the gyroscope sensor. It offers five unit modes, background or foreground display rotation, and fine calibration of the gyrometer.
Compare observed celestial altitudes with live calculated values for precise navigation. Tap to pause and receive instant feedback. Access data for the Sun, Moon, Venus, Mars, Jupiter, Saturn, 57 navigational stars, and Polaris.