Zapchat, by TAG.
This is the fastest way to reach us, and the one we can act on. In Zapchat, open Settings → Report a Problem, write what happened, and send. Use it for anything — a bug, something that looks wrong, a question, or a request.
A report sent this way arrives with your app version, iOS version, device model and a recent diagnostic log attached, so we can usually see the problem without asking you to reproduce it. It carries no messages and no contacts.
Email support@tag.org. Tell us what you were doing and what happened; a screenshot helps more than anything else.
Zapchat asks for the phone number of the WhatsApp account you want to use, then gives you an eight-character code. On the phone that holds that account, open WhatsApp → Settings → Linked Devices → Link a Device → Link with phone number instead, and type the code. Your account stays on your phone; Zapchat becomes one of its linked devices.
WhatsApp decides how much history it sends to a newly linked device — usually recent conversations rather than your full archive. This is true of every companion client, including WhatsApp Web. Messages sent from now on will always arrive.
On your phone: WhatsApp → Settings → Linked Devices → tap Zapchat → Log Out. That immediately ends Zapchat's access to your account. To also delete the session stored on our server, email us.
Zapchat is an independent client and is not affiliated with WhatsApp or Meta. If the problem is with your WhatsApp account — registration, bans, your phone's own app — WhatsApp support is the right place. If it is with Zapchat, write to us.