Feature request: ability to enter negative values on iOS

@scarabaea’s solution in Restarting Odometer to non-zero value is still blowing my mind, and I’m so excited to use it on my reading goal! Unfortunately, I discovered there’s no way to input a specific negative value on iOS (where I always record my reading datapoints) because the (custom?) numeric keyboard has no minus sign:

Can we get some <0 <3 on iOS? Thanks!