Whatsapp is great, but every so often something in the app makes it feel like it's developed by one guy in his parents' basement.
For example, currently there's no way to migrate your chat history between iphone and android without paying $25 for a third party app (that doesn't always work).
I'm using an iPhone 6. The camera takes 5-10 seconds to open from within the app.
It takes them months to add simple features, like 3D touch. I didn't mind when they didn't add it because maybe they didn't want to. But then it came like 9 months after the feature was introduced.
Plus the interface is getting very old and is need of a major redesign.
If Apple releases iMessage for Android as is rumored, the whatsapp team should be worried.