Kaehn, spent more time w/ your app this past weekend, and I really do like it. Couple of suggestions:
1) An alert on startup "Missing SD card"
2) When SD card is missing, the error message that pops up when hitting the shutter button disappears so fast I had to hit the button 10 times in order to read what it was trying to tell me..."No SD Card"
3) An "auto-boost" feature. I had to come back and land every battery change because I forgot to boost and the app won't boost mid flight.
Also, on one of my flights after a battery change I forgot to boost but the "boosted" icon was displayed. I don't believe it's possible for a boost to last through a power cycle, so this is probably a bug.
Keep up the good work!