"Tool allows stealthy tracking of #Signal and #WhatsApp users through delivery receipts"
#ArcaneChat don't have delivery receipts, only read receipts, the only automatic responses the app does in your behalf is to handle invite links, for that to be abused you first have to share your invite link with a malicious contact, you can get in contact with random/public entity via their invite link and be safe, as long as it is not you the one sharing your invite link!
In Signal / WhatsApp as soon as you contact someone or they guess your number you are vulnerable
To start with in ArcaneChat (and other #chatmail clients like DeltaChat) you don't need a phone number (or any private data at all!) to register, attackers can't simply guess your ID and do an exploit like the one mentioned in that article, keep your family safe! move everyone to ArcaneChat/DeltaChat 💜