Thanks for the tip, i didn't notice Strongbox can be used for free. I refuse to buy any subscriptions so i always only buy full versions of apps. For my particular use case €45 is way too much though. Perhaps this will change in the future and i might buy it.

I bought the '1 time purchase' of 1Password on macOS like 6 years ago and have been happily using that on macOS, iPhone and iPad. Still gets updates today (I did pay for 1 major upgrade if i remember correct.) It was way cheaper than all the subscription crap where you don't really realize what you're paying for and how much. I would never buy the current expensive 1Password subscription.