An Android soaring forecast app was developed to help consolidate various forecasts and information useful for soaring(aka gliding) pilots. To help with assessing soaring conditions a customized version of Windy was added via an Android webview.
Hi @akarsha yes it is written on their product page, under trial you have the sentence : Returns data from random coordinates. So the data is not useful in trial mode indeed.
As for the future forecast, the API should return the data for various Timestamps. Did you manage to make it work?