Mobile Apps by the Same Developer

Useful apps for focus, files, and quiet play

This shared product site introduces lightweight mobile apps built for everyday use: a calm color-sorting puzzle and a local-first PDF document toolkit.

Each product is designed to feel simple at the surface, practical in the hand, and respectful of the device data it handles.

Liquid Cup Puzzle PDF Professor Privacy-first design

Liquid Cup Puzzle

Liquid Cup Puzzle is a relaxing logic game about sorting colorful liquid layers into the right cups. Each move is simple, but every level asks you to think ahead.

How to Play

  1. Tap a cup to select the top liquid color.
  2. Tap another cup to pour into it.
  3. You can only pour onto the same color or into an empty cup.
  4. Keep sorting until each cup is filled with a single color.

Game Goal

The goal is to organize all mixed liquids into clean single-color cups. Empty cups are your temporary workspace, so planning the order of moves is the key to solving each puzzle.

Why Players Like It

  • Calm puzzle flow with clear color feedback.
  • Short levels that are easy to start anytime.
  • Increasing difficulty for players who enjoy strategy.
  • A simple rule set with satisfying solutions.
Local-First PDF Toolkit

PDF Professor

PDF Professor is a premium lightweight PDF reader and document utility for Android. It helps you open local documents, continue recent reading, organize pages, merge and split PDFs, convert images or office documents, add signatures and watermarks, and create safe generated copies.

PDF Professor is built around local file handling. Documents are selected by the user, processed on the device where possible, and saved back to the system Downloads folder as new files.

Read PDF Merge & split Convert files Sign & watermark