For 100 rupees I don't even open my laptop. Do you really think someone will make you delivery app for 100 rupees? Even my data packs cost higher than 100 Rupees. One more thing, if you invest only 100 rupees at most you will earn 150 rupees from that. Try to be practical and place practical offers. We app developers are not slave of someone with 100 rupees. First get some money in your pocket then show your face here, if you can't then get lost.