RiverCall is a new Android app. Before it can go on Google Play, Google needs 12 testers in its closed test for 14 days in a row. 2 of 20 testers are in so far.
What you do: join with your Google account, install the app, use it on a few days during the 14 days, and write a short report from day 10.
Paid from the pot: the testers who join a Google Play test this month share $200. Stay all 14 days and send your report: you get 20 points, plus 5 for each star your report gets. The pot is shared by points (at most 10 % each) and paid to your balance on the 21st of next month.
This is also your qualification test. When your report gets 3 stars or more and you've stayed the 14 days, you can join paid tests, from $3.80 a report.
What to test
Use the app as you normally would, try its main features, and tell us what works, what doesn't and what you would change.