I use a simple word doc (delivered to them as a PDF so it is mobile device compatible) listing total calories, macro targets, meal number, if that meal is a pre/post workout, total calories/macros per meal, and foods/measurements for that meal. My clients enjoy that it is simple, easy to read, and easy to digest (pun intended) or refer to.
As far as meal ideas go, I always get preferred foods and food aversion lists from my clients during consultation and use those as ‘meal idea starters’ and then use MyFitnessPal to calculate. I use MyFitnessPal because it is what I recommend that they use to track, and I want to mimic their potential calculations as closely as possible. I looked into other software but it doesn’t always allow the degree of customization I like to offer in a program.