Why won't my apps open?

Please help!! Why won't my apps open on my iPhone?

• I recently tried to add songs from my iTunes to my phone. However, it never worked and I'm unsure why. I am using iTunes on another laptop. I'm not too sure if that's the reason why it's not working. Ever since then, my apps won't even open either like my whatsapp. I receive my messages but when I try to open them..the app closes again. When I connect my iPhone to iTunes and go to my app library..it says that I trasferred my apps to the library. How do I get it back to normal so I can use my apps and put songs from iTunes to my iPhone? Please help!!

• Answer:

  Apple Devices have to be synced to one laptop , for example . I have an iPhone 4 and I can only put music and everything and sync it from one laptop. If I try on another laptop it will tell you in itunes that it will erase everything . or if you just go to the music tab on summary for example and just sync all the music it will sync it and you'll have everything but it'll replace all you music with the one from that laptop . so somewhere in between you might have tried to sync all and messed something up . so I would just try to delete the apps from your phone and reinstall them . they will work . all your data will most likely be saved from the app .