UD5 Toolkit
Semaphore Flag Signal Trainer β Online Random Letter Drill
A random letter appears; you must select the correct semaphore position from 4 choices. Scouts & maritime.
Tag: Custom Training Drills
15+ toolsKnife Sharpening Angle Trainer β Hold Your Pocket Stone Correctly
Use your phone's gyroscope to practice holding a knife at exactly 20Β° on a flat stone. Build muscle memory for field sharpening.
Windows Shortcut Driller β Online Random Win+Key Prompt
Randomly prompts you to press a Windows keyboard shortcut (e.g., Win+E). Learn to be a power user.
Carrom Aim Trainer β Online Virtual Flick & Rebound Practice
Practice carrom shots on a virtual board. Visualize rebounds and plan your strike on the physical board.
RSVP Speed Reading Trainer β Online Flash Words
Paste text and set display speed for Rapid Serial Visual Presentation. Train your reading speed.
Phonetic Alphabet Speed Trainer - Online Alpha Bravo Charlie
Random letters appear; you must type the correct code word quickly. Beat your high score. Learn the NATO alphabet.
Keyboard Shortcut Trainer β Online Learn VS Code / Figma Keys
Select a tool (VS Code, Figma, etc.) and get random shortcut prompts. Press the keys to practice.
Mental Math Trainer - Online Timed Arithmetic Drills
Practice mental arithmetic with customizable operators and digit count. Timed rounds, score tracking. Works offline. Improve your brain speed.
Braille Alphabet Trainer - Online Learn Dot Patterns
Flashcards for learning Braille. See the dot pattern and type the letter. Track your speed and accuracy. Accessibility education.
Morse Code Alphabet Trainer - Online Random Character Drills
See a random letter/number and tap the Morse sequence. Instant feedback. Practice the full international Morse alphabet.
Number Memory Trainer - Online Recall Digits
A sequence of digits flashes for a few seconds. Type it back. Increase length. Improve your working memory.
Morse Code Key Trainer - Online Straight Key Simulator
Practice sending Morse code using a virtual straight key. Visual feedback and audio tone. Learn timing and proper fist.
Mental Math Trainer - Online Timed Arithmetic
Solve random arithmetic problems under a time limit. Track your score and improve mental calculation. No data collected.
Bass Fretboard Trainer - Online Note Recognition Game
A random note name appears; click the correct position on the bass fretboard. Beat your time and accuracy.
Piano Sight Reading Trainer - Online Random Note Staff
A random note appears on the grand staff; click the correct piano key. Improve sheet music reading. Multiple clefs.