Postpone works with all Twitter accounts, whether you are subscribed to Twitter Blue or not.

Here's how you can connect your Twitter account to Postpone:

1. Navigate to Settings > Connected Accounts > Twitter on Postpone.
2. Click Connect a Twitter Account.
3. Proceed to log in with your Twitter account.
   1. Follow the prompts on Twitter.com and accept the permissions Postpone requires to submit posts on your behalf and process analytics data.
4. After accepting the prompts you will be redirected to Postpone with your Twitter account connected. You can now schedule your Tweets!