Can I use the app on multiple phones at the same time?

While it's possible to login on multiple devices at the same time this will cause issues when the system needs to send data

While it's technically possible to login on multiple devices at the same time, this is not advisable for the following reasons.

When you sign in on a phone the device ID is registered under your account and this is used to send push notifications to your device. The last phone that you signed in to, will be the only phone to get push notifications
If you swap between two phones, each time you view a question the data is sent to the active phone and stored in the cache. This data is not sent to the other device.

The recommendation is to sign in to the phone that you have with you the majority of the time or at the time when you like to answer questions.

✅ If you get a new phone then sign out of your old phone and then sign in to the new phone to keep answering questions and receiving notifications