Fact · Dictation on phones and tablets
Apple's developer documentation says a custom iPhone keyboard runs in a sandbox that by default disallows network access, and that users must switch on Allow Full Access to change this.
Checked against its source on October 16, 2026
In the source's own words
“Custom keyboards operate in a sandboxed environment running in an isolated process. This sandbox's default configuration disallows access to the network”
Configuring open access for a custom keyboard, Apple, Apple Developer Documentation, 2026, Discussion.
Open the original- What it measures
- Allow Full Access is the switch that lets a keyboard use the network and advanced features that need a server.
- What it does not show
- Written for developers.