In a controversial move for Android fans, Yamaha released (iPhone/iPad) years ago. This app functioned as a simplified editor, allowing users to purchase "Voice Banks" like Hatsune Miku or VY1.
"Touch and Sing: Evaluating Gesture-Based Control for Vocal Synthesis" (ACM CHI 2021, not Vocaloid-specific but uses the Android Vocaloid API). vocaloid editor android
Find instructions on how to move song data and use the File Manager on the In a controversial move for Android fans, Yamaha