Passcode lock for WhatsApp I am using an iPod touch 5 and I want to put a password on my WhatsApp, but the apps available on the App Store are not according to my need. Can you suggest some apps so that I can put a passcode on WhatsApp without jailbreaking?
Individual apps from the App Store can't be passcode protected in this way without jailbreaking which you mentioned you don't want to do. Restrictions are only available for pre-installed apps and features.

Instead, you can passcode the device, which will prevent access to the apps on the device, including WhatsApp. Go to Settings &rarr; Passcode to set it up.