1. Download any OCR software from f-droid, or preferred store.
2. Copy text.
3. Run llama-gpt¹ if you want something self-hosted or any LLM² on huggingface chat if you want ready solution
4. Paste text and write something like “summary:” below.

¹Theoretically possible on mobile, but for better performance, run it on PC.

²Default one should do the job.

Disclaimer: I think that it should work, but I haven’t done anything like that before

Android won’t be easy, but you can slap together a python script that runs tesseract or easyOCR and runs it through a pretrained LLM like T5. Those are well-known and well-documented, so chatGPT can probably write the script for you without too many hiccups.