Right now, TikTok doesn't allow any third-party app to post automatically. However, with Crowdfire you can make sure you are posting regularly. 

When you schedule a video for TikTok, Crowdfire will send you a notification when it is time to post. You can tap on the notification, copy and paste the caption as well as hashtags and post.

To post, you need to have Crowdfire and TikTok app on your phone.