Did you know you can merge PDFs for free using ChatGPT? Here's how :
Go to chatgpt app on your phone or chatgpt.com and log in (this will enable you to upload files)
Ask it to merge pdf files and supply as attached. It will merge the pdfs and provide a download link, even with free plan!!
Here is a transcription of the chat, it seems to be working flawlessly but your mileage might vary.
Let me know in the comments!!