Field Agent is available on Android.
I've been using it for approx 2 months.
The pay is very is minimal, but the tasks are incredibly easy.
However, it adds up really quickly.
Customer service is excellent.
I've done about 70 assignments.
I was denied payment on two.
I emailed to ask why I was denied the payment.
They replied the next day. (Yes, it was my fault)
Payouts are usually the same day.
I think the longest I waited was 2 days.
At $6.50 each, the scavenger hunts are highly competitive.
The trick to those:
only accept if you know that you can locate the correct UPC
take CLEAR photos