I have looked at & downloaded so many todo/reminder apps that I was ready to give up searching. Then I came across GoodTask 2. It has finally given me an app that I can use for both tasks & calendar reminders in list form. It has a calendar view if needed. So many of these apps that offer so much flexibility are just too difficult to use without a lot of practice time, if ever. This app offers everything including syncing with IOS reminders & calendar and repeat tasks that includes every repeat pattern possible. I needed the ability to use last day of month for one & a second Wednesday of each month for another. It was easy to set up. It offers manual or auto day night setting. Using this app is very intuitive, which can be a difficult thing to find. Give it a try if you cant seem to find the perfect app.
*Update (10/28/15): thanks for fixing the bug in syncs. Everything is syncing from iPad to iPhone very quickly - Thank you!
Delawarewatch about GoodTask 2 - Reminders, To-do, Task Manager with Calendar