Guize, I've been downloading wallets and chains since 2014 and putting them in their own neat VM environment for security. I know the difference between tokens and platforms, lolz.

TX generation and Signed TX broadcast service is the best way to go.

@witoldsz is developing light clients for us Grin

https://github.com/witoldsz/semux-light

That's awesome! It's the moon, gentlemen. The github tells us how to clone it and build the lightweight wallet on a Linux machine. If you're a Windows user, just make a virtual Linux machine, see https://www.virtualbox.org/

I use and like Ubuntu for VM.

I have updated the README.md. The wallet has been deployed to https://semux.online and https://testnet.semux.online. Also, I have released the semux-light-front package under "release" tab.
Of course, you can always build everything yourself from sources and use local Semux client with API enabled as well.

Notice: all the cryptography is happening locally, in semux-light-front. The semux-light-server delegates queries and signed transactions to Semux with API enabled.