I’ve been in the same situation and found
Snapinsta to be a fantastic solution. It allows you to easily download Instagram Reels without watermarks or ads. Just copy the link of the Reel you want to save, paste it into the site, and within seconds, you have the video downloaded in its original quality. It works for both mobile and desktop, and it doesn’t require any sign-up or installation. Definitely my go-to for saving Reels.