The app helps users track their trains across India and claims to have 10mn registered users.
It also works offline or with poor connectivity and supports eight languages.
The Bengaluru-based firm announced the acquisition on its website earlier today.
“We’re excited to share that Sigmoid Labs, the team behind the “Where is my train” app, is joining Google,” a spokesperson wrote.
“We can think of no better place to help us achieve our mission, and we’re excited to join Google to help bring technology and information into more people’s hands.”
The financial figures behind the deal were not disclosed although India’s Economic Times reported that the acquisition is worth around $30-$40mn.
The deal comes as part of Google’s ‘Next Billion User’ department which ams to develop products and services to enhance internet adoption in emerging markets like India.