The Election Commission, in July last year, launched the Android-based mobile application, using which a person can secretly send to it geo-tagged videos and photos of illegal-money being distributed or a hate speech being made during polls.
The application called 'cVIGIL', which stands for "citizens vigil', is available on Google Play Store.
The model code of conduct for next month's Lok Sabha polls came into effect on March 10 and most of the complaints were received by the state election office after that, the official said.
"Around 400 complaints have been received through cVIGIL across Maharashtra," he said.
Explaining the process, the official said, "The local team gets an alert once the complaint is lodged and our people reach the spot and verify the details. If the complaint is valid, we record the details and initiate an inquiry."
Most of the complaints were pertaining to banners put up without permission, said the official.
"There are no complaints so far of comments inciting violence or casteist remarks as hardly any public-rallies have been held in the state," he said.
LS elections in Maharashtra will be held in four phases, April 11, 18, 23 and 29, while results will be declared on May 23.
Love Mumbai news?
Subscribe to stay updated.