Amateur radio reference for all users.
This reference app provides quick access to amateur radio band limits, country codes, band plans, radiogram messages, grid squares, and time. It also includes the RST system, Morse code, phonetic alphabet, unit abbreviations, and metric prefixes.
Showing 161–180 of 1,000 ranked alternatives.
森 袁
Learn Chinese characters with phonetic meaning
Teaches 1200 common Chinese characters through phonetic and visual associations. Children match characters to images based on content. Includes interactive exercises for reinforced memory and understanding.
Xavier Daxhelet
Optical calculations for engineers and students.
The app calculates the refractive index of transparent materials based on wavelength. It also computes light transmission angles, reflection and transmission coefficients, critical angle, and Brewster’s angle.
PFI Knowledge Solutions Ltd
Look up properties and specifications
Access alloy and temper data for over 200 combinations. View mechanical and physical properties in US Customary and SI Metric units. Check chemical composition limits and typical applications.
Sunshine Valley Systems
Interpret and communicate using morse code.
The app interprets morse code using a key, camera, or microphone. It can play back morse code with sound or lighting effects.
HORIS INTERNATIONAL LIMITED
Solve geometry problems on a grid
Solve geometry problems on a triangular grid. Complete 300+ tasks ranging from simple to complex. Explore 26 subjects and learn 70+ geometric terms. Track progress with a record table in Game Center.
Atlas Educational Software
States, learn flags, test capitals
Learn about Asian through quizzes on locations, capitals, populous cities, flags, coat of arms, and country abbreviations. Customize topics and . View past results to track progress on specific topics.
Ismail Tezcan
Reference information for flight crews.
The app provides reference information for cockpit and cabin crew. It contains hundreds of delay codes and almost all CPDLC codes, along with tables and aviation abbreviations.
Harald Tammen
Calculate molarity, moles, and dilutions.
The app calculates molarity, converts between grams and moles, and computes dilutions. It features slider-controlled SI-prefixes with automatic value adjustment and allows switching molecular weight between Dalton and kilo-Daltons.
Aleksei Metelkin
Finger size and size
Finger size and size using the 's measurement tool. Input band width and finger shape for accurate results. Provide size recommendations for online or in-store purchases.
TLA Systems Ltd.
Calculate with advanced scientific functions
Perform complex calculations with support for hexadecimal, octal, and binary. Use RPN mode and multi-line display. Access unit conversions, constants, and scientific notation. View a paper tape and use multiple undo/redo functions.
William Alexander
Simple arithmetic challenges and leaderboards.
The app offers simple arithmetic challenges with easy and normal difficulty settings. Players can unlock achievements and select answers from a grid of numbers to climb leaderboards.
V PUGAZHENTHI
Calculate and convert units
& Converters provides tools for structural analysis, unit conversion, and formula-based calculations. Users can compute shear capacity, slenderness ratio, compressive stress, bending stress, and safety factors.
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