No, it will be more tiring, because when you are tired, your movements will be irregular, and fitness equipment will make you more standardized and increase your strength. Just doing sit-ups will only increase abdominal muscles, but other muscles will not.

Your own fitness equipment will be boring and incomplete if you practice for a long time. I suggest you go to the gym to have more atmosphere, so that you can communicate with each other, promote each other and speed up muscle gain.