The in-app purchase said that by buying a voice for the app will also remove ads. Did not say anything about having to pay additional $0.99 to do so. The way its stated, its part of buying the voice package and not an additional purchase requirement. While $0.99 is not a big deal, it is a misrepresentation and can be a significant amount when you multiply with total number of purchases. They need to be upfront and be clear about it and make it a requirement to also purchase “Pro Upgrade” to remove the ads, or give a choice not to remove add when voices are purchased.
mgkg3 about Translate Professional, v6.0.2