It is an application that counts the number of characters.
Just paste the text, it will issue three types of results.
1. The number of characters (including spaces)
2. The number of characters (no spaces)
3. Number of characters check for Twitter.
Twitter of check returns the number of characters and if there is no problem. If you have over the character limit of Twitter and returns "NG".
This is a very simple app. Please use at the time of papers and abstracts created. Of course, it can help at the time of submission to the SNS.