Dont
The fee is monthly. That was hidden to me when I loaded the app. Second, it will fill your phone with pop up messages of the phrase of the day. Third, it keeps prompting you to buy other apps that do stuff you can get free (like weather ... who pays for THAT?). Basically it works OK but no better than free ones, and the free ones carry none of the irritations. Unsubscribed.
FWT104 about
Speak & Translate - Translator, v3.9