WhatsApp users are normally notified when a sent message is read by the recipient. Much like iMessage shows the time that an outgoing message was read, two blue check marks appear after a WhatsApp message is read. While Messages can be configured to keep read status private, disabling read receipts in WhatsApp is a more complicated proposition.
Those with stock iOS 8 devices can use a trick to prevent WhatsApp from reporting read receipts. Once a new message notification arrives, switch the device into Airplane Mode. Read the message in WhatsApp, then quit the app. Finally, turn Airplane Mode off.
This process must be used every time a message is received, but it will prevent the sender from knowing their messages were actually read. Jailbreakers can disable the feature entirely, for all WhatsApp correspondence with the jailbreak tweak WhatsApp Read Receipt Disabler.
Once installed, WhatsApp Read Receipt Disabler does exactly what its name suggests. The two grey check marks will appear to indicate delivery, however with the tweak enabled the checks never turn blue to signal the content was read.WhatsApp Read Receipt Disabler is available from the BigBoss repository on Cydia for free. To start customizing iOS, click here for instructions on how to jailbreak iOS 8.1 with Pangu. Those with older firmware can check here for details on jailbreaking iOS 7.0 with evasi0n 7. The previous release of Pangu will jailbreak devices running iOS 7.1. Find out how to purchase and install Cydia tweaks with this guide.