Ever notice how iOS changes the time selection increments you can choose from based on the app? For example, in Reminders and Calendar you can only pick times that end in a multiple of 5 minutes. Alarms in the Clock app have no such limitation, you can pick whatever minute of the hour you prefer.
Developer Brandon Sachs decided to do something about this after seeing the Every Last Minute tweak to add minutes to the Calendar app. The result of his work is the tweak In A Minute, which adds fine-grained time selection to all of the iOS scrolling date pickers system-wide.
Never get stuck rounding to the closest 5-minute interval again. Once installed, there are no options to configure, the package simply increases the time choices to every minute in every hour. Maybe the 5-minute interval is close enough for most users. Still, it’s nice to know that if you like to have complete control over Reminders and Calendar entry times that the option is available.
In A Minute is available on Cydia from the BigBoss repo free of charge. Check here for instructions on how to jailbreak iOS 6.x with evasi0n. You can also find out how to purchase and install Cydia tweaks with this guide.