Is it possible to separate cracked apps from legal apps?

basically, used use cracked apps, lots of them. days dead. buy of apps now.

there way, whether in itunes or other program, separate cracked apps legal apps? i'm trying free space on hard drive, , i'm sure can knock out few gbs deleting of cracked apps. have on 500 apps in itunes, , regardless of whether use of them or not, don't want unintentionally delete apps i've legally bought.

 

can't redownload legal apps?

 

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