1. Instead of displaying the app name on the top of home page you can place there a search bar like this(with same animation) instead of a tab.

2. This is app named voice audiobook player. You can also change settings menu like this app(cause yours not looks good with monospace font)
   

I recommend you to look into this app for inspiration cause it also a simple static app like yours.

3. Also in Alga, navigation pill background is only black, but it should be same as nav bar background like apps tachiyomi, obtainium. (i know its nitpicking but its your call in the end)

4. Consider changing the font. Previously mentioned apps tachiyomi and voice's fonts are looking good. But idk what font are they using maybe google's open sans.

5. Make tool's icon consistent, now its looking weird to use some white, monochrome, colorful icons.