Describing the original concept, Tucker writes, "We've all encountered a situation where we forget to respond to a text message from someone. Myself included. Here's a potential solution (concept)."
In a conversation in Messages, hold down on a specific message to reveal the "Remind" option. Tapping it gives you the option to set a reminder for the following times:
- 1 minute
- 5 minutes
- 15 minutes
- 1 hour
- (and of course there's a Cancel button at the bottom)
Once you've chosen a time, a notification bulletin is added into Notification Center which will re-alert you after the selected time.
Unfortunately, the tweak is not yet available via Cydia; however, there is an implementation by Jonathan Bailey that can installed via GitHub.
1) Open Safari on your device and enter this URL: https://github.com/Jon889/smsremind
2) Tap on the folder link called "build"
3) Tap on the file link "com.jbp.smsremind_0.0.1-1_iphoneos-arm.deb
4) Tap the link "View Raw"
5) Tap "Open in iFile"
6) Tap "Installer"
7) Tap "Done"
8) Respring your device
Give it a try!