It is ok not to jailbreak, but the old version is relatively limited not to jailbreak;

Now the applications downloaded from the Apple Store with id are all the latest, so you definitely can't download them from the Apple Store.

Ios devices can use third-party assistants to download older versions.

Computer download pp assistant-data cable connection device-PP was successfully installed on-iPad.

Open it, enter the software name in the search box, and click the drop-down page to see it.

Version History-View all options;