Need advice re purchasing gadget to help track protein

I had the bypass in late July and am getting better at making sure that I have sufficien****er, vitamins, and exercise each day. But I am still guessing about protein and want to buy one of the gadgets in the market: to help me calculate my protein: either DietCalc Nutrition Calculator or Calorie Smart. My cell phone doesn't have the internet, so that isn't an option. Any advice in helping me choose between nutritional calculator gadgets?