Resize it - compress any image

As a web developer, I created my own journal app, and wanted to upload photos on the website, but I’ve put a cap of 8MB total worth of uploaded photos. The challenge was the photos nowadays are really huge, and I don’t want to put duplicate photos of my photo library into my web server. This app reduces the file size in a way that is inconceivable and appropriate to my needs. Thank you developer for this amazing app.

Does exactly what I need it to do and exactly what it says it will do… no fancy hoops to jump through, no “Oops, you did five images now pay us a ransom”. Just. Good. Simple. Functional. Tech.

This app does exacly what it says, efficiently. But now it tells me that I only have 10 gb of storage free and won't let me do more images. My phone itself has plenty of storage, so I'm not sure if the app is taking up storage room or why it won't let me continue using. This has been an efficicent way of resizing photos for upload...I want it to keep working! There is no option to delete files or clear cache. What do I need to do?