I think is the best conversion tool for everyone
Features

* Live update from Yahoo service

* Currencies flags

* It's free with no ads.

English To Tamil Dictionary for Android Devices -Trail Version
With lot of Amazing options

Comprehensive information about 192 countries includes information about the names of all the capitals, population, official languages, currency and much more. Economic performance include: the total GDP and GDP per capita, as well as the index of HDI. More than 3,000 locations around the world that are worth visiting. 1.000 dishes that reflect the unique culture of all continents and nations.