Coparenting app recommendations please

Hi IMs. Does anyone use an app for co-parenting with an ex? We need one that shows clearly who has the kids, what time and where changeover is on changeover days, etc. Ex is constantly chopping and changing times with the kids and treating me like childcare. We need to get it back on track per the parenting orders. Wanting to make it as clear and simple as possible to minimise discussion and excuses for getting it wrong. Pros and cons of the ones you use would be very welcome. Thank you amazing community x