Measure distance by timing lightning and thunder. Press "Start" on lightning and "Stop" on thunder to calculate distance. Includes animation for lightning and sound effect for thunder.
by Kai Bruchmann★ 0.00 ratingsWeather$0.99Data updated 2026-09-06
Track magnetic fields and detect ferromagnetic metals
Detects magnetic fields and ferromagnetic metals using the iPhone's compass. Issues a warning beep when magnetic fields are present. Identifies devices emitting radio-frequency EMF such as plugs, cell phones, and routers.
Play as Sam to restore weather control by fixing a malfunctioning machine. Navigate through various environments to repair the system and prevent global weather chaos. Solve puzzles and interact with characters to progress through the game.
Metronome offers precise timing with a reliable clock engine. Features include adjustable beat volume and sound customization. Includes a bouncing ball animation for visual beat tracking. Allows saving sessions as presets.
Take an IQ test to assess cognitive abilities. Answer multiple-choice questions to determine your intelligence quotient. Receive a score compared to the average of 100. Identify strengths and areas for improvement.
Learn through mnemonic images, audio, and animations. Take quizzes to test knowledge. Receive simple explanations about Japanese writing system and characters. Track progress through interactive lessons.
View live radar and historical images. Track clouds, dust, and fog from satellite data. Monitor lightning activity. Access precipitation forecasts for hours and days from multiple models. Overlay forecasts on . Share weather data with others.
Practice identifying musical intervals through harmonic and melodic exercises. Listen to pairs of notes and determine their relationship by distance. Receive feedback on answers and track progress over time.
Create a calming atmosphere with and visual . Control the by playing or pausing. Set a sleep timer to stop the sound automatically. Use for focus, relaxation, or sleep.
Explore phenomena by interacting with models of clouds, rain, snow, and storms. Adjust temperature, wind, and precipitation to simulate different conditions.
Calculate missing sides of right-angled triangles using the Pythagorean theorem. Input two sides to find the third. Save calculations in a history. Share complete solutions. Support for entering fractions. Remove ads.
Track phases, moonrise, and moonset times for any date. View current and location-based compass to determine rising and setting positions. Set location for accurate data.
Convert units for length, weight, volume, temperature,
Convert units for length, weight, width, volume, velocity, temperature, and pressure. Select the desired and perform conversions. Use tabs to switch between categories. Input values and receive converted results.
Find on an interactive world map using approximate location. Discover suggested cafes to meet nearby users. Connect with people globally for long-distance friendships.
Test cognitive skills with memory, typing, aiming, and reaction . Track scores and compare with friends. Record progress and view performance metrics. Play multiple game types to measure different abilities.
Monitor boat position and anchor status in real time. Receive alerts if the anchor drags or moves unexpectedly. Track vessel location and set custom alarm thresholds. View historical data and manage settings for multiple vessels.
Calculates air density, relative humidity, and air pressure automatically. Displays geographic position, temperature, dewpoint, elevation, and barometric pressure. Supports airport and manual input modes.