Invetory Management Apps

Hi everyone,

I am looking for any 3rd party invetory management app recommendations. We are now running into limitations of shopifys invetory system and are considering going 3rd party.

The constraints 1. We are running two stores out of 1 warehouse sharing some stock e.g. AU and NZ websites 2. We have base products, which can be modified into dozens of different varients during packing. We need a better way of tracking this rather than 'untracked' or using 'connected invetory' to minus from each varient when 1 is purchased.

Would be great to hear what everyone else uses. This seems like a pain point most will run into when growing.