Best Koji Watanabe Apps

Receipt Camera

OCR scan copy & paste

Free

Scan receipts and extract text for easy copy-pasting into accounting apps, spreadsheets, or personal finance tools. This free utility is ideal for managing household expenses or business expenditures.

Furigana Camera - Kanji Reader

Japanese book reading support

Free

This app uses your device's camera to add furigana (pronunciation guides) and romanized characters to Japanese text in photos. It supports both vertical and horizontal layouts, with adjustable font sizes and a dark mode option for comfortable reading.

TuneTracks - Play for YouTube

No login needed & Group videos

Free

Stream YouTube videos and music without needing an account. Organize your favorite content into custom groups and playlists for various activities like dance practice, studying, or work background music.

VoiceTick Counter

Voice Counter for Workout

Free

This app automatically counts your exercise repetitions using your voice, eliminating the need for manual tracking. Stay focused on your workout without the distraction of counting.

Japanese Pronunciation Trainer

Practice Japanese Speech

Free

Enhance your Japanese speaking abilities with this articulation training application. Practice daily with model audio and receive immediate feedback to achieve clear pronunciation and speak confidently. Unlock your voice through guided speech exercises.

Ratio Memo Calculator

Save ratios in advance & calc.

Free

Save and reuse frequently used ratios with this calculator. It supports pre-set ratios for screen sizes, aspect ratios, and common mathematical constants. Quickly calculate missing values with decimal point support.