on (one's) own
1. By or through one's individual efforts or means. I had to finish designing the website on my own after many of our workers were laid off.
2. Without the assistance or support of, or dependence upon, anybody else. I don't need anyone's pity or help, I can make it all on my own, thank you very much.
on one's own
1. By one's own efforts or resources, as in He built the entire addition on his own. [Mid-1900s]
2. Responsible for oneself, independent of outside help or control, as in Dave moved out last fall; he's on his own now. [Mid-1900s]