[APP] Kinbo – Mobile-first Manga/E-book Optimizer (Android)

Hi everyone,

I wanted to share a project I’ve been working on called Kinbo.

I’m a huge fan of Kindle Comic Converter (KCC), but I often found myself wanting to prep manga or PDFs while away from my desktop. I built Kinbo to bring that same optimization pipeline directly to Android so I could handle everything on my phone right after a download.

Main Features:

• Smart Margin Cropping: Automatically detects and trims borders to maximize art on 6" and 7" screens.
• Spread Splitting: Logic to detect and split double-page spreads into portrait or rotate them.
• Native KEPUB Export: Built-in support for Kobo’s KEPUB format.
• AI Upscaling: On-device sharpening for lower-resolution scans.
• Batch Processing: Handles entire folders or series in the background.

Current Limitations:
Please note that AZW3 and MOBI are not yet supported. I’m currently focusing on the EPUB/KEPUB and PDF pipelines first.

Technical Note:
The app is built in Kotlin. I’ve implemented a parallel processing pipeline to keep it stable even on mid-range devices without hitting the Android Low Memory Killer.

Google Play Store:
https://play.google.com/store/apps/d...inbo.converter

Looking forward to your thoughts!