Hassan Salem Al Homoud and his wife, Zainab Al Hosani, were charged with engaging in forced labor and could face up to 20 years in prison if convicted.
Secessionist sentiment in the south, stoked by what southerners see as marginalisation by the north, is deepening as result of the damage inflicted upon Aden by the northern Houthis.
A survey, which polled smartphone users in Saudi Arabia, UAE, Lebanon and Egypt, found that more than 50 per cent of users downloaded more than five apps in the last month.