When it comes to your iPhone’s display brightness, you might have a preferred brightness level for both indoor and outdoor usage. Sadly, iOS’ automatic brightness setting tends to be less than optimal, and adjusting the display brightness manually can feel somewhat cumbersome at times.
If you’re in the same boat, then you might want to turn your attention to a newly-released and free jailbreak tweak called EasyBrightness by iOS developer gilesgc. This tweak mitigates the problem discussed above by letting you designate a default display brightness level and making it easy to return to it on demand.