Just a general comment for those reading: this app is very likely a business expense for any freelancer or business owner. Cashflow planning is a core business job and allows you to determine how much you can invest, what jobs you need to seek when, etc. So this significantly cuts the cost of the service.
Btw, to the maker, something like $15 USD would be a no brainer purchase price for me personally. This price, roughly $25 USD, is something I'll have to think about, but may get. (That might make $25 USD the right price! This is just one data point)
Also, you may wish to consider setting your prices in USD instead of Euros, depending on where your customers are located for the most part. A lot of non-US business owners will nonetheless operate in USD. For example, I'm Canadian but the US is my largest market so all of my prices and most of my online expenses are in USD, I have a USD credit card, etc. Likewise, my developer lives in Asia, and takes all of his payments in USD.
If your customers are mostly European this probably isn't worth it, but it could gain you some extra sales through reduced friction in other markets.
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I had subscribed several years back, but didn't have a need then, so I cancelled. Now, I've moved to a higher sales higher expense model and had large cashflow swings in the low season. Which is why I'm quite likely to do it at $25 USD now, when I didn't before: I'm aware of how horrible cashflow crunches are.
Does wise cash do multi currency actually?