Mobile apps that help women in the Indian countryside and tiny villages in Japan to open their homes to visitors from across the world are generating incomes, revitalizing remote communities and helping to curb migration to cities.

A women's organization in the western Indian state of Gujarat has tied up with Airbnb, the short-term home rental service, to train rural women to be hosts and list their homes on its site.

A year in, the number of women earning from home sharing has doubled, according to the Self Employed Women's Association (SEWA), which has about 2 million members, mostly in villages.