My storage

I doubt that you are both running the exact same apps. Apps differ in size and you may have different amounts of storage on your phones. The only way to gain more storage is to delete photos, messages, apps, etc.. Be sure to save important photos and data to your computer or an external drive. Check this link...

How to check the storage on your iPhone, iPad, and iPod touch - Apple Support

Isabella77_ Said:

"My storage: My storage is almost full and yet I have less apps than my mom does on her iPhone 11"

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What Else to Clear:

A. Clear Temporary Internet Files:

Clear your Temporary Internet Files(Cookies & Cache) of Safari:

• Cookies perform remembrance of certain site-entered data.
• Cache keeps a snapshot of the last time you visited a site.
• Go Here: Clear the History and Cookies from Safari on your iPhone, iPad, or iPod Touch - Apple Support

Also...



B. Clean TV and Music Libraries:

Remove all unneeded files from your TV and Music Libraries. Full-Movies take up 2-4GB typically, and a bunch of those would take up a load of storage, ideally. So, if you have any movies that are not needed, then delete them.

Isabella77_ Said:

"My storage: My storage is almost full and yet I have less apps than my mom does on her iPhone 11"

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Perform as instructed here: How to Clear "Other" in your iPhone's Storage - Use Backup - User Tip