Android Developer for more than 10 years, based in Cebu, Philippines. Primarily making Android Native applications in Kotlin and Java.
Below are some of my public projects:
FretCalc
Fret Spacing Calculator for Android
A precision tool for luthiers and instrument builders that calculates exact fret positions for any stringed instrument.
Key Features
- Accurate fret spacing calculations using the equal temperament formula
- Multi-unit support (millimeters, centimeters, inches) with independent input/output conversions
- Professional results table with distances from nut and between consecutive frets
- Share functionality for sending calculations to collaborators
Available on Google Play Store for professional luthiers and DIY instrument makers worldwide.
Guitar Fingerboard
The ultimate interactive tool for visualizing and mastering the guitar neck! Whether you’re a beginner taking your first steps in music theory or an intermediate player looking to explore new chord voicings, our app is designed to guide you on your musical journey.
Dive into a beautifully rendered, 24-fret virtual guitar neck. Tap on any note to hear it, helping you train your ear and instantly recognize notes anywhere on the fretboard. It’s a fun and effective way to learn!
Transform your understanding of music theory. Select any root note and choose from a vast library of chord and scale types to see them instantly light up. Our app makes it easy to see the relationships between notes and understand complex musical concepts.
Key Features
- Interactive Learning: A fully interactive 24-fret guitar neck.
- Chord & Scale Library: Visualize major, minor, pentatonic, diminished, and augmented chords, and more.
- Audio Feedback: Tap a note to hear it, perfect for ear training.
- Note Highlighting: See root notes and other chord/scale tones clearly with color-coded highlights.
- Clean Interface: A beautiful and intuitive Material Design 3 interface that’s easy to navigate.
Perfect for all guitar players, from absolute beginners to seasoned pros. Download Guitar Fretboard now and take the next step in your musical journey!
Ukulele Fretboard
The ultimate interactive tool for visualizing and mastering the ukulele neck! Whether you’re a beginner taking your first steps in music theory or an intermediate player looking to explore new chord voicings, our app is designed to guide you on your musical journey.
Dive into a beautifully rendered, 24-fret virtual ukulele neck. Tap on any note to hear it, helping you train your ear and instantly recognize notes anywhere on the fretboard. It’s a fun and effective way to learn!
Key Features
- Interactive Learning: A fully interactive 24-fret guitar neck.
- Chord & Scale Library: Visualize major, minor, pentatonic, diminished, and augmented chords, and more.
- Audio Feedback: Tap a note to hear it, perfect for ear training.
- Note Highlighting: See root notes and other chord/scale tones clearly with color-coded highlights.
- Clean Interface: A beautiful and intuitive Material Design 3 interface that’s easy to navigate.
Perfect for all guitar players, from absolute beginners to seasoned pros. Download Guitar Fretboard now and take the next step in your musical journey!
PayCalc
Transaction Fee Calculator
An Android application that calculates PayPal transaction fees in real-time, helping freelancers, merchants, and service providers determine the exact amount to charge clients to account for PayPal’s fees. The app supports 26 international currencies with customizable fee structures and provides instant calculations as users type.
The application requires no internet connection after initial setup and maintains strict user privacy by processing all calculations locally.
Key Features
- 26 International Currencies – Pre-configured with accurate PayPal fee structures for major global currencies
- Real-Time Calculations – Instant fee computation as users type their desired amount
- Customizable Fee Settings – Adjust percentage and fixed fees for different PayPal account types
- Offline Functionality – All calculations performed locally without internet connection
- Smart Data Persistence – Automatically saves custom settings and last used currency
- Material Design UI – Modern, intuitive interface optimized for all Android screen sizes
- Privacy-Focused – Zero personal data collection, all processing happens on-device
- Free to Use – No paywalls or premium features, fully functional at no cost
Live on Google Play Store | Supporting 26+ currencies worldwide
