ImmediateSend is a jailbreak tweak that allows you to send immediate replies to ongoing texts or iMessage conversations.
The tweak assumes you already know what’s going on in the conversation because it avoids opening the full body of the chat window. The idea is that it saves time. Os instead, you are prompted to send responses to messages via a quick entry text window. The window contains different options on how to send the message rpely as with an SMS, iMessage or you can open the full body of the chat anyway.
ImmediateSend works from the Home screen, the Lock screen and even from the Phone and Contact apps. The only option in Settings for the app is the on/off switch. Once disabled everything goes back to working as normally.
ImmediateSend can be bought for 99 cents at Cydia’s BigBoss repo.