There're duplicated questions somewhere but they don't inform that device is no jailbreak.
In there any way to check that an application is already installed or not?
There're duplicated questions somewhere but they don't inform that device is no jailbreak.
In there any way to check that an application is already installed or not?
You can use the library appList to get a list of installed apps and packages, available for free on Cydia (source on GitHub: https://github.com/rpetrich/AppList). With it you can query apps/packages by bundle id. There's an example in the Github repo, or here's a related answer on SO: https://stackoverflow.com/a/10328585/381233.
(I think the OP is correct about there not being questions like his asked here already, the 2 questions listed in the comments currently don't mention Jailbreak.)