Same. I do have a couple of apps on my device that are not open source but that's primarily my bank app and that's the only one. However, that will be going away very soon as I did just switch banks this previous month and confirmed that my direct deposit is going to the new account. So I will be shutting that one down and my new bank is completely available on the web. So I will be using their website instead of an app.
I have ways of negating some of that price fluctuation for a start. I only value my Monero at the 365 day moving average instead of valuing it with the actual price fluctuations. This causes my budgeted items to remain stable and in the vast majority of cases actually makes me have more than what I think I have.