Self-Employed Income: This is a big shot played by you, where every shot is decided and executed by you. Where the success of your work is determined and expressed by your belief and performances. Yes, there are some demerits of the same for suppose you are sick or want a vacation; still you have to run the show and cannot be completely unavailable for a long time from your establishment.
Indian economic policy after independence was influenced by the colonial experience, which was seen as exploitative by Indian leaders exposed to British social democracy and the planned economy of the Soviet Union. Domestic policy tended towards protectionism, with a strong emphasis on import substitution industrialisation, economic interventionism, a large government-run public sector, business regulation, and central planning, while trade and foreign investment policies were relatively liberal. Five-Year Plans of India resembled central planning in the Soviet Union. Steel, mining, machine tools, telecommunications, insurance, and power plants, among other industries, were effectively nationalised in the mid-1950s.
Building a smartphone or tablet app requires a fair amount of technical expertise, but it can pay off handsomely if successful. It doesn't have to be particularly complex or chock-full of features either; a simple one that solves a problem or is entertaining enough to attract users works fine. You never know what may suddenly become popular. For example, the minimalist game Flappy Bird was such a craze that at one point its developer was earning $50,000 dollars a day through in-app advertising. Of course, expecting a success like that is foolhardy, but one can always hope.
In focusing on your wealth management goals, investment income is obviously critical but you might fund your goals from wider sources of income. A typical long-term portfolio might produce about half its return as income and the other half as capital growth, though in times of duress the capital growth component wanes. In this low-interest rate climate, some sources of income have become quite expensive and may prove disappointing against your spending needs. But by tax efficiently and sustainably drawing income from wider sources, you might meet your goals while more prudently balancing risk against reward.