Knife Sharpening Angle Trainer – Hold Your Pocket Stone Correctly
Use your phone's gyroscope to practice holding a knife at exactly 20° on a flat stone. Build muscle memory for field sharpening.
UD5 Toolkit
Use your phone's gyroscope to practice holding a knife at exactly 20° on a flat stone. Build muscle memory for field sharpening.
Generate a short bass line in a specific style with standard notation and tab. Use it as a daily warm‑up or improvisation prompt for bass players.
Choose a scale (major, minor, pentatonic, modes) and a key to see all five CAGED positions on an interactive fretboard. Notes and intervals labeled.
Input the notes you're playing and get all possible chord names, including inversions and slash chords. A lifesaver for songwriters and music theorists.
A random letter appears; you must select the correct semaphore position from 4 choices. Scouts & maritime.
Randomly prompts you to press a Windows keyboard shortcut (e.g., Win+E). Learn to be a power user.
Practice carrom shots on a virtual board. Visualize rebounds and plan your strike on the physical board.
Paste text and set display speed for Rapid Serial Visual Presentation. Train your reading speed.
Select a tool (VS Code, Figma, etc.) and get random shortcut prompts. Press the keys to practice.
Practice mental arithmetic with customizable operators and digit count. Timed rounds, score tracking. Works offline. Improve your brain speed.
A minimalist text notepad that auto-saves to your browser's localStorage. No ads, no signup, no data leaves your device. Perfect for quick ideas.
Write notes that are encrypted in your browser before saving to localStorage. Only accessible with your passphrase.
Random letters appear; you must type the correct code word quickly. Beat your high score. Learn the NATO alphabet.
Flashcards for learning Braille. See the dot pattern and type the letter. Track your speed and accuracy. Accessibility education.
Connect your MIDI keyboard and see pressed notes visually on a piano roll. Check velocity, channel, and aftertouch. No DAW needed.
Solve random arithmetic problems under a time limit. Track your score and improve mental calculation. No data collected.
A sequence of digits flashes for a few seconds. Type it back. Increase length. Improve your working memory.
Fill in a pre‑designed meeting notes template and copy as formatted HTML or plain text. Quick documentation.
Practice sending Morse code using a virtual straight key. Visual feedback and audio tone. Learn timing and proper fist.
A random note appears on the grand staff; click the correct piano key. Improve sheet music reading. Multiple clefs.
See a random letter/number and tap the Morse sequence. Instant feedback. Practice the full international Morse alphabet.
Write and store encrypted daily journal entries directly in your browser's localStorage. Export as TXT. No sign-up, fully private.