GBWhatsApp DELTA is an unofficial application developed as a variation of GBWhatsApp, a popular mod of WhatsApp. It was created to expand the functionalities of the original GBWhatsApp, offering additional features for customization and control. GBWhatsApp DELTA allows users to customize the interface with new themes and fonts, send larger media files, such as videos of up to 50 MB and audios of up to 100 MB, and use longer videos in statuses. It also includes options such as automatic reply, blocking calls without notifying the caller, support for stickers from other apps, and the use of external video players. Other features include group calls and the removal of labels from forwarded messages.
Despite the additions, using GBWhatsApp DELTA involves risks, such as possible bans by the official WhatsApp and instability in updates, as it is an unauthorized mod. It requires Android 2.2 or higher and the activation of "Unknown Sources" for installation via APK. The download and use are the user's responsibility, without validation or official support from WhatsApp or the original developers.