Hey there @Lucas_Primc and welcome to the Community 
We agree that the delivery of this takes us longer than expected, and we’re so sorry about that!
Much as I’d love to share the ETA, unfortunately, we don’t have any news on the Currency Converter app just yet. However, I’d like to assure you that we’re fully committed to developing new apps. Actually, we’ve rolled out three new widgets only this month:
The thing is that, we prioritize requests based on both their complexity and the number of votes they receive. Currently, there are higher-priority requests that our devs are actively working on. You can look through these requests here.
Rest assured, as soon as we have any news on the Currency Converter app, we’ll immediately update you here 
Thanks a bunch for your feedback!