Pedro Daniel Macalupu Cumpen

AppTrack Ninja 上的 App Store 发行商。

作品集包括：

• Pitch Glide - Sing and tune
• Metronome Pro & Tempo
• Banjo Tuner Basic
• Bass Tuner Basic
• Mandolin Tuner and Chords
• Sanshin Tuner Basic
• Cello Tuner Basic
• Tone Generator Professional
• Violin Tuner Basic
• Viola Tuner Basic
• Double Bass Tuner Basic
• Tuning Fork Pro