I cannot find the trial version in the Google Play Store

I cannot find the trial version in the Google Play Store. The description of the Pro version says to look for “Smart Keyboard Trial” but if I search for exactly that text (with double quotes: https://play.google.com/store/search?q=“Smart%20Keyboard%20Trial”&c=apps) then the only result is the Smart Keyboard Pro app. If I look at all apps available from developer Dexilog (https://play.google.com/store/apps/developer?id=Dexilog) then I see 35 apps of which 1 is the Pro app and all others are “Language for Smart Keyboard” apps. If I look for Smart Keyboard Trial without double quotes (I can’t include the link because this is my first post) then I get too many results to look through, including many by different developers that don’t look anything like Smart Keyboard. Is the trial version no longer available?