The App Store description limit
An App Store description can be up to 4,000 characters. Only the first few lines show before the "more" link, and Apple does not index the description for App Store search, so it works on people who have already found the page.
How to write a App Store description
Put the strongest reason to download in the first sentence, because most visitors never tap "more". Short paragraphs and a simple feature list read better on a phone than one long block.
Questions
What is the App Store description character limit?
4,000 characters. Only the first lines show before "more".
Does the App Store description affect search ranking?
Not directly; Apple indexes the name, subtitle and keywords. The description affects whether visitors download.
Can I use emoji and line breaks?
Yes, line breaks and emoji are allowed. Use them to make the text easy to scan, not as decoration.
Do spaces and emoji count?
Spaces and punctuation count as one character each. This checker counts each visible character once, so an emoji counts as one.
Is my text stored or sent anywhere?
No. The counting happens in your browser and nothing is uploaded.