None. A 14-day trial on the monthly plan only; the annual plan gets no trial.
“Not published” means we did not find a renewal price stated by the vendor on the date we checked. It is not a claim that the price changes on renewal, and it is not a claim that it doesn’t.
PlateLens Premium is now $34.99 a year, which moves the cheapest paid tier in the category $5 below Lose It!. Here is the whole ledger, with the monthly traps and the free-tier caps.