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
Learn Mandarin with AI-driven lessons aligned with HSK standards. Practice pronunciation using real-time tone analysis via microphone. Watch mini-dramas to understand idioms. Play a calligraphy game for stroke-order practice.
Provides acoustic feedback for leveling surfaces. It detects tilt direction and emits high-pitched beeps for upward adjustment and low-pitched beeps for downward adjustment.
Adjusts phone screen brightness and color to provide soft, natural lighting for selfies. Enhances skin tone and facial features with customizable warm or cool tones. Offers professional lighting setup without external equipment.
Generate continuous audio tones between 20 Hz and 20,000 Hz for testing, fitness, or sound design. Save and recall custom presets. Access a clean, intuitive interface for precise control.
Learn Chinese characters with 1200 essential words, including pronunciation and writing. View real-life pictures with hidden options. Tap to hear standard pronunciation for characters and phrases. See stroke order with numbered steps and arrows.
The app deciphers the global NCDXF/IARU HF beacon network to determine real-time band openings. It displays current solar-terrestrial conditions and propagation information for beacon bands, updating data automatically.
Practice chord progressions by setting for each bar and playing them on the keyboard. View chord tones and sounds in real time. Play full songs with multiple bars. Track chord patterns for pop and jazz music.
Play bagpipes using on-screen controls to simulate fingering and embellishments. Adjust breath pressure and volume for realistic sound. Listen to high-quality recordings of real bagpipes.
A calming -based game with five stages. Players tap falling eggs to create bugs and interact with them. Each stage offers different motions and sounds. Users can customize touches to suit their mood.
Automatically cleans speakers to remove distortions and improve audio quality. Generate tones for testing and calibration. Adjust equalizer settings to customize sound output. Monitor health and receive alerts for potential issues.
Calculate component values for desired corner frequency, resistance, capacitance, or inductance. Find combinations of resistors, capacitors, and inductors. View detailed calculations and formulas. Export results. Remove ads with PRO version.
& uses frequency generation to remove from speakers. It includes a liquid remover for cleaning devices. It also cleans dust from speakers. The features a built-in decibel meter for monitoring sound levels.