AirDroid is available on Google Play now: https://play.google.com/store/apps/details?id=com.sand.airdroid
Some of you may have noticed that AirDroid was missing from Google Play in the past few hours. We just want to explain this thing here:
We got a removal alert from Google Play saying that AirDroid violates the Content Policy, due to using the trademark of WhatsApp. However, Google soon re-reviewed the request and found it was a mistake and reinstated our App then.
As Google has reinstated our App, AirDroid will be available on Google Play soon.
Sorry for any inconvenience this may have caused.
BTW, if you need AirDroid now, you can get the .apk file here: http://dl.airdroid.com/AirDroid_3.1.3.apk