Learn and practice Morse Code by touching the screen to generate tones. Adjust tone frequency from 300 Hz to 1200 Hz and control volume. Send dots with short touches and dashes with longer holds.
by Ronald Nicholson★ 4.528 ratingsEducationFreeData updated 2026-09-08
Clean iPhone speakers by generating a sine wave . Adjust frequency with swipe gestures. Control intensity for effective moisture removal. Perform cleaning sessions to restore speaker clarity.
Study questions, track progress, prepare for exams
Review and practice questions from the Question Pool effective July 1, 2023. Access practice exams, track progress, and prepare for Amateur Radio License exams. Upgrade from Technician to license within the .
Learn code using the Koch method with one-letter drills and mastery checks. Practice at full speed, track progress, and test knowledge. Customize settings for different learning goals. Share achievements and results.
Provides a bright LED light with dual switch control. Includes strobe mode, Morse code transmitter, and a lighted magnifier. Allows users to toggle between features quickly.
Learn and decode with AI-powered audio recognition that translates sounds into text. Practice through games like sound recognition and typing races. Access a detailed table for reference. Translate text to and vice versa.
Provides a comprehensive list of international , including letters, numbers, and substitutes. View detailed descriptions of each flag. Take custom quizzes to test knowledge. Includes flashlight morse code examples and a minimalist design.
Practice code with adjustable speed settings and customizable exercises. Generate random characters for timed drills. Track progress with accuracy and speed metrics. Share results and compare with other users. Sync sessions across devices.
Review and practice questions from the Amateur Radio License exam pool. Access the Question Pool effective July 1, 2024. Track progress and prepare for exams. Upgrade from General to Amateur license. Sync study sessions across devices.
Encode and decode text between , Unicode, and Morse code. Support URI encoding and decoding. Calculate hashes using MD2, MD4, MD5, SHA1, SHA224, SHA256, SHA512. Encode images from the photo library to and decode strings to save images in the album.
Support multiple input methods including Easy English, Emoji, Morse code, X-SAMPA, Unicode, Swift Kana, Simplified Greek, Manchu/Hebrew, Mandarin (mountain head enhanced), and various pinyin and double-pinyin schemes.
Convert text to and decode incoming signals. Share decoded messages. the alphabet through interactive lessons and exercises. Track progress with daily practice. Test skills with quizzes and audio pattern recognition.