YourPortfolio is designed to show you immediately if your stocks are up, down, or even, and how much you have netted for the day based on that performance. It works, as indicated, and looks pretty good, but extremely slow loading times are such that the app is nearly impossible to use as a quick reference on a regular basis throughout the day.
When you load the app the first time, you'll wait some time for it to load. It took two minutes to load the data on our first use and then close to a minute each time after that if the app had not been turned on in a while. Some loads were faster than others, but it was always slower than it felt like it should be. The interface on the home screen is very basic -- you can see how much you're up, how much you're down, and where it balances out. At the same time, you can edit the stocks you are tracking and the currency in which they are tracked (It starts in Euros, but you can switch to dollars, pounds or another currency, easily). All of this is very good and it frankly looks quite good in action, but the performance issues are a major drawback that will make the app unusable for many people.
If you need a stock ticker or even a basic dashboard to show your current status in the market, this is not it. The slow load times and limited features beyond a basic display make it frustrating to use and not very effective for quick updates on the go.