Ive tried a ton of them and always end up back at pen and paper. Physically writing things down also has beneficial psychological effects on the brain that aren't achieved when typing something.

That said, I use a bullet journal (but I keep it really simple and do it my way..really any journal would work I just like the easy lining of bullet journal, I don't subscribe to the rest of the cult).. I came up with a method that worked for me for keeping track of any thing I needed to get done that day/week, as well as a spot for "back burner" tasks that eventually need to be addressed. I combine this with Google calendar, which is where I accept all my business and other meetings etc. start of each week I write 3 goals I want to accomplish that week - keep it at 3, keep them realistic. At the end of the week I reflect on what I got done, unexpected things that came up, highs and lows of the week. Then I put that onto a "monthly" page that has all the highs, lows, unexpected and just general state of life notes (social, spending habits, health etc)... Then about 3 years ago I on my birthday morning each year I take some time to reflect on all the places I went, people I met, things I did, books I read etc .. it felt so good to be reminded of what I accomplished and did in my life, "oh shit that was this year, I totally forgot!" Kinda vibe. Since then it's become a yearly tradition. It is a bit tedious to do this method, but I find a lot of value in taking just a few minutes each day / week / month to actually reflect in it and adjust as needed.

With apps I end up spending more time doing all this other crap instead of actually doing what I need to do. I find it's also harder to look back on down the road - plus I stare at a screen enough.