Based on nexus’ screenshot it looks like the app uses the Cloud with Rain emoji, which was added after my android version and thus is not supported.
A quick fix would be using the Umbrella with Rain Drops emoji, which is old enough to be included in Android 5.
seems to only sub when needed, is that right
I think so, yeah. Although I’ve (somehow) avoided doing any Android development so I’ve never used the library.
It can also download the fonts on the fly, so it wouldn’t bloat Monzo’s APK for you lucky Android 8.1 users.