Kruti Dev is one of the most popular Hindi font. This font is commonly used in many North Indian states like Madhya Pradesh, Haryana, Rajasthan and many other states of India like Bihar and Uttar Pradesh have Kruti Dev standard Hindi font.
Most of the government and non-government typing tests in these states are done in Kruti Dev and Mangal fonts. Kriti Dev Hindi font is the most used Hindi font. You should not worry about the cost of Kriti Dev Hindi font because it is available to you absolutely free, that's why this Hindi font is most commonly used in Hindi typing.