Is there a best practice on closing mobile tooltips? Use close icon?

1. Are tooltips mobile friendly?
2. Should tooltips have periods?

Are tooltips mobile friendly?

Tooltips aren't just for web—they're one of the most popular and effective UI patterns for mobile apps, too.

Should tooltips have periods?

Tooltips should be as concise and clear as possible. Keep the text to 1 or 2 short sentences. If the information you need to communicate is longer than that, look into using a different design. If a tooltip is written in a full sentence (or is 2 or more sentences), include a period at the end.