Favorite video-related phone app
 

Just wanted to see what other folks here found useful in regards to video/audio production. I'll start with a few Android apps that I find helpful:
1) Color Temp Meter: Could use a zoom or spot-picker capability, but might come in handy when you don't want to relocate the camera, but still need a reasonably accurate kelvin reading.
2)Audalyzer: Waveform/spectrograph and VU meter. See if your room has some nasty issues.
3)Spectrum Analyze: paid version gives zoom-in and pause capability.
4)Acacia: Optics/DOF calculation and directors viewfinder capability. Nifty!
5)TimeLapse CALC: For those times when simple algebra escapes you.

Re: Favorite video-related phone app
 

on iPhone:

Maps - get to the shoot on time
Camera - scout the location, document setups, "scan" documents, etc
DropBox - cloud storage of demo reels, scripts, equipment manuals, etc
SunSeeker - find out where the sun is going to be
GoPro - control my WiFi GoPros
Movie*Slate - slate
RODE Rec - even without the SmartLav, the iPhone can be a handy extra mic/recorder

Plenty of others

Re: Favorite video-related phone app
 

The two that I use a lot are SunSeeker and Artemis.