We’ve talked about this feature – just haven’t gotten around to it yet! Thanks for the suggestion :)
Hey Borja – thanks for the feedback! We’d like to bring “Trends” or something similar to our mobile apps in the future, though it may take us some time. And we definitely want to make Splitwise better for group trips! Hopefully we’ll have some good updates for you later this year.
Thanks for the detailed feedback – it’s always useful to hear, and I’ll pass it on :)
One small feature you may not be aware of: on our website, Splitwise does allow you to add group members without email addresses, which hopefully helps for the “large party” scenario. My apologies that the same feature isn’t available on our mobile apps!
Splitwise has some basic support for this now, depending on what you’re looking for. We now support multiple email addresses for a single account, so you can more easily share one account with multiple people.
However, we won’t automatically adjust how much you should owe as a “couple”. For example, if “Bob” adds an expense with “Sue and John’s Couple Account”, then the bill will be split 50/50 between those two Splitwise accounts. I can definitely see how it would be useful to automatically make Sue and John pay for 2 shares, but we’re unlikely to add that feature in the near future. For now, you can still work around this by manually using the “Split by shares” option when adding a bill, and assigning 2 shares to the relevant account.
We aren’t planing to add support for custom categories in the near future. We’re considering better ways to allow people to sort expenses into categories other than the ones we’ve provided. In the meantime, if there are particular important categories you feel are missing, feel free to email us with a suggestion at email@example.com.