Seth: There is a firmware update for the Mooshimeter itself, but as always it’s a little complicated.
For Android: The firmware binary is bundled in to the app itself, so to get the new firmware you must update your app.
For iOS: I made it so that the app checks the moosh.im website for a new firmware binary instead of bundling. This is because of the long approval process for any Apple updates. But in the last version of the iOS app, firmware updates are automatic and forced. This generated a lot of negative feedback, so I decided to make this update voluntary, which means an app change. This means another round of Apple approval.
So in short, since you’re on iOS, you will need to update your app to get the latest Mooshimeter firmware. Hope this helps!