1) the law, at least in the US. Laws such as copyright and maybe even the CFAA have been abused to outlaw adversarial interoperability. You'd need to either practice good opsec and operate anonymously or be based out of reach of US-allied law enforcement.
2) Apple (and maybe Google too?) - they will remove any client for a third-party service unless said client has explicit approval from the third-party, all the way up to ridiculous levels such as rejecting an app using the LAN API of smart home devices explicitly designed for this purpose: https://community.lifx.com/t/app-store-rejection-permission-...
1) the law, at least in the US. Laws such as copyright and maybe even the CFAA have been abused to outlaw adversarial interoperability. You'd need to either practice good opsec and operate anonymously or be based out of reach of US-allied law enforcement.
2) Apple (and maybe Google too?) - they will remove any client for a third-party service unless said client has explicit approval from the third-party, all the way up to ridiculous levels such as rejecting an app using the LAN API of smart home devices explicitly designed for this purpose: https://community.lifx.com/t/app-store-rejection-permission-...