Your iPhone has a “Low Power Mode”, which you'll be prompted to activate it when your phone reaches 20% battery. There will be a popup to remind you, here’s the tutorial to customize the content of this popup.
Ext3nder Installer is a modified version of Ext3nder, also a modified version of Cydia Extender. It is developed by Julio Verne. Julio Verne has been largely inactive on the jailbreak scene in the past couple of weeks.
Apple's newest iPhones can capture high-quality 60 FPS 4K video, but there are a lot of other factors that need to be taken into account to make excellent videos that can compete with what you can do with a traditional camera.
PreferenceLoader is an open-source MobileSubstrate based utility that allows developers to add entries to the Settings application, similar to the Settings bundles that AppStore apps use.
NoLowPowerAutoLock V0.02 is released, developer Spark which helps you prevent 30 second screen lock and dim (optional) when your device in low power mode.