Back in October, Dev Center, Microsoft's developer-oriented hub, received a feature called Review Insights, meant to aid devs in categorizing the feedback they were receiving. Now, the software giant has enabled the ability for developers to set a custom price, otherwise known as free-form pricing.
When you submit an app, you can choose a base price in a variety of markets, a price which is expressed in the local currency and needs to be within a certain limit - $0.99 - $1,999.99 when it comes to USD, for example. You are able to pick whichever price tier you desire - with 10 cent increments between them - and then customize the value to something like 11,11 CNY as shown above.
If what you have entered exceeds the lower or top ends of the price range, you get a warning. Furthermore, while base pricing can be customized in a free-form manner for single markets, changing it for a group of markets is not possible, as it still retains the tiered structure present before. In other words, if you want to modify the base price of an app in China, Japan, and South Korea at once, you'd need to add another pricing tier.