Operational questions answered with the same three-valued verdict as the reports: a window is open or it is not or the data cannot say; a flight is feasible under the rule, or not, or not decidable from what was published. Each app reads pinned public data, decides over a declared envelope, and shows the certificate one click below the answer. The Brazilian products are in Portuguese.
Where an answer rests on a forecast or a physical model, Janela and Swell say so on the page: the forecast is drawn as computed, dashed, never as a decision, and the decision names the premises it rests on, each with how far it was checked — validated, compared, verified or assumed — and the weakest of them.