Is the app tied to Google or Apple?
(Though Smart-ID is its own thing and is a fair bit more locked down, but I’ve managed to get it running on a phone without Google services IIRC.)
But, like the parent said, you have many other options other than the physical ID-card as well. Most people these days use Mobiil-ID or SmartID, which works on your phone and even smart watch. SmartID is completely free and Mobiil-ID is tied to your phones carrier, so the cost varies, but it's a one-time set-up fee of around 5€. Mobiil-ID certificate also lasts 5 years.