Update: Upgrading to 3 stars. The app is more stable, but the app still randomly logs me out and I have to enter my full login credentials. Sometimes I can go months without this happening, other times as few as two weeks.
Original Review: Overall, I really like Juve at work and for the most part I like the app. But it continually does random odd things. Right now, for instance, the app badge icon shows that I have 3 unread items in my inbox. When I open the app and select "unread" items, I have none. I can verify that in the desktop version. No matter what I do (including closing the app by swiping it up, it still shows three unread items. Thats new behavior in the past couple of weeks.
More commonly, the mobile app will randomly log me out of my account. I have discovered that sometimes I can simply close the app once or twice and then it miraculously remembers my saved login. Other times I have to renter my login credentials. Its more stable than in the past, but still happens once every 4-6 weeks.
Last week, the iPhone app kept crashing every time I tried to open one specific item in my inbox. I must have tried 8 or 9 times over a ten minute period, including closing / swiping up the app and reopening it. A co-worker had the same thing happening on an iPhone. About an hour later, everything worked fine.