In the beginning, Google gave users a full 24-hours to regret an app purchase. In 2010, they updated their policy such that users only had 15-minutes to change their minds (which is a little tight, especially if you like to shop on your desktop and have apps downloaded onto your device from there –this method of shopping can add a few extra minutes to complete installation). As of September 10, 2014, the Google Play Store has become a little more generous and settled on a 2-hour refund window.
While many people enjoyed the original 24-hour window, most are willing to agree that it was overkill. Having 2 full hours to test-drive an app is very reasonable, and it is hard to complain when it beats the 0-minutes offers by the competition!
Some developers may be unhappy with this window being extended, but it should have a positive impact on reviews –with fewer users leaving poor reviews indicating that they are completely dissatisfied.
Google made this change without a press release or much fanfare, but it is laid out in black and white on the Google Play support page.