Используйте приложение APKPure
Историческую версию Text Counter можно получить на Android
Считает количество символов, слов, предложений, абзацев и непечатаемых!
"Text Counter" is an app that counts the number of characters, words, sentences, paragraphs, and whitespaces.
You can check count results per inputing a character.
NOTE -
Logic of counts is very simple. So results may not be accurate.
I'm not responsible for count results.
The source code is public on GitHub.
You're welcome to contribute.
https://github.com/75py/TextCounter/