Tomoaki Okubo

App Store publisher on AppTrack Ninja.

Portfolio includes:

• 金融英語ドリル
• IT英語ドリル〜BrSEへの道〜
• 反射トレーニング
• CBT Note
• Infinite Cracking!
• Bass Relative Pitch Trainer
• Guitar Relative Pitch Trainer
• Piano Relative Pitch Trainer
• Positive Mind - ABCDE理論で思考整理
• Unit Price Comparator
• Rhythm Change Metronome
• Training with Cards