It looks like Guarda wallet is mainly closed-source. Only certain components are open-source, not its core wallet. In which case, you might want to consider other alternatives.
It does not look like, but it is actually a close source wallet.
https://walletscrutiny.com/?platform=allPlatforms&page=0&query-string=guardaGuarda wallet is from a scam lab, Evercode lab too.
ChangeNow.io (Evercode Lab) - Scam. Illegally holding of 100 BCH (11 bitcoins).
It's better and safer to avoid Guarda wallet.