Advocate-Dairy is easy to use and available over cloud on pay per use model. It is most value for money application available without requiring any upfront cost or commitment. You definitely have a trial period to try it out for free. You can choose from simple subscription packages:
-- "Refer a friend" - Just refer a friend and both of you get extended subscription
-- "Pay per Quarter" - It is suitable for those who are still undecided and has 3 Months Validity that costs 297 Rupees.
-- "Pay per Year" - Most economical package, giving 1 year usage period at cost of 10 months, which means 2 months discount. Costs just Rs 990.