I love Splitwise, but the one problem I have is with multi-currency trips (the main reason my friends and I use it). It is really easy to muddle things up, even with separate groups, which we tried this time round. The main problem is that your entire interface was made for single currency and multi-currency feels bolted on.

If Pro solves that, I'd be more than happy to sign up for it, but you're not making it easy to find out how it would work and I currently don't have the trust that it'll solve the currency problem.

Providing screenshots would go a long way towards that.