Allow Facebook login in the iOS app
We’d definitely like to bring Facebook login to the iPhone app – it’s on our list of possible features for a future release. For now, if you have an existing Splitwise account connected to Facebook, you can log into our mobile app by following the instructions here: http://feedback.splitwise.com/knowledgebase/articles/111323-how-do-i-log-in-with-facebook-connect-on-the-split
You dont have login options using facebook or gmail in ios as android version u have please upgrade ur iOS Splitwise
Coco C commented
Surprised to see that I can use Facebook to login on your website but not in your app. I created an account and input bills on your website but can't access them on mobile now.