The Idea:
Genial to do that with the smartphone. This can be taken anywhere and with the app you can achieve great results. Easily operated and send it via e-mail makes the whole round.
The Sound:
The SmartLav + inferior to its more expensive counterparts in nothing. Especially great is the strong directional character. I'll now run with the microphone on the camera, so that I can fit some background noise.
Conclusion:
For 50 you not only get here "what good value for money", but a really good microphone. And an app you can use as a sound engineer that even without much knowledge.