When encrypting the SD card via Android's encryption it makes the SD card only usable on that device.
However if that device gets lost or broken or if one would like to access the SD card from another device such as another mobile phone (maybe even with another OS than android) or a computer the SD card isn't accessible.
This is why I'd like to encrypt my SD card with some other tool than the one built into Android.
Is there such an encryption tool for Android which allows you to de- and encrypt the SD card in a way that it can also be decrypted on other devices?
It would be best if the tool also automatically prompted the user to enter the SD card password right after Android has completed the entire boot-process. This question seems to be relevant: Cross-platform compatible encryption of SD-card for Android but it's not about specific tools/ways.
It should be capable of encrypting Android data on the SD card, convenient to use and install (FDroid or Playstore), secure, not put the card at risk of data-loss and not slow down the phone / read/write-speeds a lot.