I good guide is the reheat leftovers (including meat) how they were originally cooked. This might help with texture issues. Or planning your meat meals so you don't have leftovers.

Maybe apps are too much for you right now. You could try pen and paper just to get the thought process down. Aim to only plan for 3-4 dinners each week to leave room for the unexpected or extras. Here's a simple set up: https://www.co.dakota.mn.us/Environment/Residential/Organics/Documents/MealPlanner.pdf

My favorite is a takeoff of "impossible cheeseburger pie." Veggies, meat, liquids, all can be used (fridge cleanout). I love doing it as a bbq version!!

French toast or Brown Betty when I have bread/rolls that need to be eaten.

Stir fry when rice needs to be rejuvenated and then can clean out the fridge.

This post made me hungry as I've not had a lot of these with the heat recently!!