Pipclock is a clock app with a Fallout-esque style theme. Here are the built-in features (as said in the App Store)

Some of its built-in features:

✔ Rusty High Resolution Textures for iPhone 4 and iPod 4
✔ Post-apocalyptic retro-futuristic design in Metal Alloy with monochrome Cathode Ray Tube display
✔ Reliable Post-Atomic Clock and Calendar
✔ GPS powered real-time weather hazards detector (acid rain, UV radiation, toxic fog and many other)¹
✔ Target Maps – Select a target location or pinpoint your current one and let Pipclock calculate distance and direction (follow the arrow pointer on the compass)¹
✔ Landscape mode to use PipClock on your wrist
✔ World Weather Stats – Weather statistics among all PipClocks in the last 24 hours
✔ The Wastelander – A N.B.C. (Nuclear, Biological and Chemical) alert system updated in real-time
✔ Access Logs – Check PipClock activity all around the globe
✔ Night Mode – To use your PipClock as Night Stand Clock
✔ Hidden Retractable Compartment, easily accessed sliding the main screen
✔ Analog Magnetic Compass with realtime Sun Position and Target Indicator
✔ Realistic Geiger Counter with sounds and smoke!
✔ Real-time Thermometer and Barometer¹
✔ Nearby Landmarks Detector (or what’s left of them)¹
✔ Dashboard mode – All the important data in one screen
✔ Self Protection Reinforced Hull (shake the device to Protect the PipClock from a Nuclear Explosion)
✔ Nuclear powered Flashlight with three different lightning presets (Broken Neon, Sleep mode, Emergency)
✔ Sunset – Sunrise Forecast with countdown to sunset and sunrise
✔ Status of the day graph – check out the percentage of sunlight left or how long you have to wait until the light illuminates the wasteland
✔ Moon phase calculator
✔ Arpanet connection to receive important messages broadcasted by the Federal Government from its underground shelter¹
✔ Help and Settings to configure your device

That’s a lot of features for only $0.99. The only thing it’s missing is an alarm, but that’s alright though because all the features it gives you. Normally a clock app like this would cost $1.99 or even $2.99. If you’re a Fallout fan or not, pick this one up, it’s really cool.