📦 Android App Looking for a lightweight Android PDF reader for large files

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I’m looking for a lightweight Android app that can handle large PDF files smoothly, especially documents with 300+ pages.

The features I care about most are：

• Smooth scrolling
• Low battery usage
• Bookmarks or reading position
• Night mode
• Minimal ads

I don’t need cloud sync or advanced editing. Which PDF reader has worked well for you?