I’ve never used reward charts because I didn’t want my kids to do things because the chart says so, plus it didn’t match my parenting values. I have always talked my kids through everything so they understand why rather than ‘because I say so’.
I have bribed them to do things but we have been open and honest about it. Eg: how can u get you to come with me to [certain event kid doesn’t want to go to] - answer - 2 euros. Ok deal haha!