Thanks! A LocalStorage only option seems very doable. With all the interest expressed here, I'll add that to the roadmap. As for the status quo, without Premium

Thanks! A LocalStorage only option seems very doable. With all the interest expressed here, I'll add that to the roadmap. As for the status quo, without Premium no plan data is stored server-side. With Premium, plan data is stored server-side only if the user chooses to enable that feature. Calculations/projections are always made client-side and the results are not stored server-side.