Actually anybody and everybody who wants to know what was "put into their code" can check it because it is opensource,  https://github.com/devaultcrypto/devault - I understand the concern, I don't trust wallets either, but lets refrain from making asinine comments that are completely false. If you can't read code maybe you shouldn't be downloading any core wallets, or any wallets for that matter. If you can read code why don't you go look at he github and see "what they put in the code".

I highly recommend installing a virtual machine or using sandboxie for any wallets you don't trust or if you can't read code.