It is completely free to use. No charges. For small businesses it will be free forever.
chatCommentsThanks for clarification because most of the Apps in market are free only during trial period - Ajay AgrawalNo it is free for ever. I do not intend to charge for it. Most of application are by big companies, this is made personally by me and this is not my main income source but passion. I am a Chartered accountant but love to code so out of love for free forever. :) - Pulkit Sharma