[thinkmassive]

On the other hand 10mb is not a lot of images. If I'm using a paid mobile app for note-taking, I probably want to be able to quickly snap a photo and maybe write a few bullet points or sentences.

According to https://inkdrop.app/pricing the free plan includes 1 GB storage, and the basic plan ($5/mo) includes 10 GB storage.

I agree with sibling comments that a limit based on number of notes would be preferable to losing access after a specified time. Maybe adjust the free tier storage allocation down, or limit the number of images/attachments.