Type a ticker or a company name to see whether you can add it to the OnlyDividends app.
In the app, tap the + button and start typing the company name or the ticker. Stocks listed outside the US usually carry an exchange suffix, for example NESN.SW for Nestlé on the SIX Swiss Exchange or AIR.PA for Airbus on Euronext Paris. The exchanges page lists the suffix for every market.