If you already have an account you can skip the steps 1. & 2., these are for new users who have not yet signed up. Steps 3.-6. concern creating the Twitter thread, while the steps 7.-10. are about the actual scheduling of an existing thread. Finally, 11.-13. are a few final tips after you have scheduled your posting.
Step-by-Step Guide
Getting Started
1. Sign up for ThreadStart.io

2. Connect your account
Go to your account settings and click 'Connect' under 'Your connected accounts'. Then follow the instructions on the Twitter authentication screen. If you signup with your Twitter account (instead of your email), you do not have to do this step. Because then your Twitter account is already linked to your ThreadStart account.

Writing the thread
3. Go to the thread editor
The thread editor makes creating threads easy. On top of writing and scheduling, it can also help you number your tweets with the click of a button and more.

4. Start writing your first tweet
The first tweet is without doubt the most important one. A good hook makes sure users stop scrolling the feed and click on your thread.
They should immediately know that it is not a single tweet but a thread they are looking at. Otherwise, they might keep scrolling after reading only the first tweet.
You can also add images to your thread. Images are often a great eyecatcher and scroll-stopper. A good hook needs to attract more attention than its surrounding tweets in the feed. A well-chosen graphic does a great job of catching attention!
5. Write your other tweets
The main body of your thread comes next. A good rule on Twitter is to make sure that every tweet of a thread could stand on its own. So, once you finish writing, read through the text again one tweet after another. For each one stop and think if the content is clear on its own. Additionally, keep in mind, a thread should not be longer as needed. Even if threads allow you to write as many tweets as you want, it is a good practice to make them as concise as possible. Otherwise, you might lose your readers halfway through. Be confident to remove tweets if your thread becomes too long. In ThreadStart removing tweets is easy. Delete the content and you're done. No need to click around the interface for that.
6. Write your final tweet
A good ending should wrap up your story and tell your reader what to do next. Sum up the most important points. Link to further reading. Or tell them about your offering. The last tweet is your 'call to action', where you can ask the reader for something in return for your content.

Setting the Scheduling Options
7. Click on 'Schedule' to open the scheduling options
Now that you finished writing it is time to schedule the thread. Click the 'Schedule' button to open the scheduling sidebar. In it, you find a date picker that lets you select the date and time when ThreadStart will post the thread to Twitter.

8. Set the date and time
You can pick any time you want. ThreadStart takes care of publishing it. On top of that ThreadStart can suggest you the perfect posting time as well. Using ThreadStart's recommendations helps you to always post at the right time. A time when your audience & followers are listening and engaging with your content.

9. Click 'Save'
Clicking the 'Save' button stores your scheduling options. Your tweets are ready and will be sent at the specified time.

10. Congratulations you have scheduled your Twitter thread
At the specified time, ThreadStart will automatically post your thread to Twitter.
Final Checks before going live
11. Check your scheduled content
You have two way to check your scheduled tweets & threads in ThreadStart.
Calendar
The calendar view shows you your content at a glance. Spot the content you have published already. Or control the postings you are about to publish. You will have everything on one screen. A filled content calendar guarantees your account never runs out of tweets!Queue
The queue view shows you a chronological list of all your scheduled tweets & threads. You can move them to an earlier slot or later time, and even remove the scheduling time if you have second thoughts.

12. Wait for the thread to go live
Waiting is the hardest part. If you scheduled the posting a few days ahead, think about scheduling a few single tweets in the meantime. This way you will already build some consistency and it warms up your audience for your thread.
13. Don't forget to reply to your followers once the thread is published!
Now you know everything to create, write & schedule your next viral thread from start to finish.