PATSPATS frequently asked questions
The most common questions about PATS. In short: PATS is free, needs no install and no phone number, and lets you chat, create groups, share photos and make video calls in the browser.
Is PATS free?
Yes. PATS is free to use, with no paid plans and no in-app purchases. All you need is a browser and an internet connection.
Can I use PATS without LINE?
Yes. PATS is a standalone messaging platform. It does not need LINE, Messenger, WhatsApp or any other chat app; both people just need a PATS account.
Do I need to download an app?
No. PATS runs in your web browser at vincent1021210.github.io. It takes no storage on your phone, and new versions are applied automatically. On Android you can also install the optional PATS app (APK), which keeps the interface on your phone so it opens faster. There is also a Windows desktop app that can start with your computer and show desktop notifications for new messages.
Can I sign up without a phone number?
Yes. PATS never asks for a phone number. Sign up with one tap using a Google account, or with an email address and password (confirmed by a 6-digit code sent to your inbox).
Does PATS work on a computer?
Yes. It works in browsers on Windows, Mac and Chromebook, as well as on phones and tablets. Remember to sign out when you use a shared or school computer.
Which browsers are supported?
Use an up-to-date version of Chrome, Edge, Safari or Firefox. Voice and video calls require allowing microphone and camera access in the browser.
Can I send photos, and how long are they kept?
Yes. On a phone you can take a photo or pick one from your gallery; it is compressed automatically before sending. Received photos can be opened full size and downloaded. Photos in chats are kept for 20 days and then expire, so download the important ones.
Can I make voice or video calls?
Yes. PATS supports one-to-one voice and video calls in the browser. During a call you can mute, turn off the camera or switch between front and rear cameras.
Can I create group chats?
Yes. Besides private messages you can create groups. Conversations you rarely use can be archived and restored later.
Who can use PATS?
Anyone. PATS has no age, school or membership restrictions; all you need is a Google account or an email address. Students, workers, family and friends can all use it.
Why does sign-up ask for an invite code?
Only when an administrator turns on invite codes, to make sure only members of a school or group can join. Ask your teacher or administrator for the code; otherwise the field is not shown.
Where is my data stored? Is it safe?
The PATS backend runs on Google Apps Script. Messages are stored in Google Sheets and photos in Google Drive. All traffic uses HTTPS, and passwords are stored as hashes, never in plain text.
Is the PATS app available in English?
The PATS app interface is currently in Traditional Chinese. You can still chat in any language, and this guide explains each step in English.
What if I forget my password?
On the sign-in page choose “Forgot password” (忘記密碼), enter your email, and set a new password with the verification code you receive. Google sign-in users do not need a password.