Chord vs Coders Friend

This app plus your ears equals complete freedom in writing music! A comprehensive set of tools for any musician: * Chord Progression: Create beautiful chord progressions with full flexibility - use inversions, sus2, sus4, 7th, 9th, and more. Enjoy live playback as piano or synth, or send MIDI directly to your macOS computer! * MIDI Controller - Multiple layouts to control your DAW right from your device. (compatible with macOS Catalina and newer) * Modulation Pad - Helps when using a compact MIDI keyboard without built-in pitch and modulation controls. Also includes a sustain pedal (compatible with macOS Catalina and newer). * MIDI Keyboard - Transform your phone into a MIDI keyboard for your macOS computer (compatible with macOS Catalina and newer). * Notation Practice: Practice reading notes in both treble and bass clefs. * Interval Practice: Practice recognizing and comparing musical intervals by ear. * Chord Calculation: Help you learn how to calculate chords and progressions. * Voice & Ear Training: Simple, effective tools for voice practice and ear training. * Harmonic Match - helps you mix tracks in key while DJing. * Guitar Chords - helps you find and browse guitar chords. * Guitar Tuner - helps you tune your guitar to the most popular tunings. Plus, enjoy the macOS version included with your purchase!

Coder's Friend is a focused toolkit for developers, engineers, and makers — built for quick access to the everyday utilities you actually need. The app is actively developed and regularly updated with new tools and features. Programmer's Calculator Work with numbers across HEX, DEC, OCT, and BIN. Perform arithmetic and bitwise operations (AND, OR, XOR, NOT, shifts) directly in your preferred number system. Bit Toggle Visualize and manipulate individual bits across 8 to 64-bit values. See how flipping a single bit changes the result — perfect for register configuration, bitmask debugging, and low-level protocol work. Subnet Calculator Enter any IPv4 address and CIDR prefix to instantly see network address, broadcast, host range, subnet mask, and wildcard mask. No more manual calculations. Timestamp Converter Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds, multiple time zones, and shows detailed breakdowns including day of year, week number, and ISO 8601 format. SCPI Generator Build instrument command sequences visually — no need to memorize SCPI syntax. Choose from ready-made actions for Digital Multimeters and DC Power Supplies, configure parameters, and get validated SCPI-99 output you can copy directly. A built-in state machine validator checks your sequence for errors and warnings before you send anything to your instrument. History Every calculation, conversion, and SCPI sequence is automatically saved. Tap any history entry to restore the full state and pick up right where you left off. Clean, fast, no ads, no tracking. Just tools that work — with more on the way.