The App Store keywords limit
The App Store keyword field takes up to 100 characters of comma-separated terms. Users never see it; Apple uses it, together with the name and subtitle, to decide which searches your app appears for.
How to write a App Store keywords
Separate terms with commas and no spaces, use singular forms, and do not repeat words already in your name or subtitle, your category name, or the word "app". Apple combines single words into phrases on its own, so "habit,tracker" also covers "habit tracker".
Questions
What is the App Store keywords character limit?
100 characters. Commas count; spaces after commas waste characters.
Should I put spaces after commas in App Store keywords?
No. Spaces count toward the 100 characters and add nothing.
Can I use competitor names as keywords?
Apple's guidelines forbid using other apps' names or trademarks in the keyword field.
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.