.app vs .io

.app grew 73% in a year; .io grew 20% since September 2025, by independent estimates. .app had 1,478,674 domains in June 2026; .io had about 1.37 million in October 2026.

.app is a generic TLD, run by Google Registry, open to the public since May 2018. .io is the country code of the British Indian Ocean Territory, run by Internet Computer Bureau.