Recent investigations into the inner workings of Apple's mobile operating system have uncovered a hidden catalog containing more than 4,500 phrases that the iOS keyboard refuses to autocomplete. Researcher Derik Kauffman discovered the restricted phrases, which he terms a gray list, after noticing that his swipe-typing functionality repeatedly stuttered or skipped over certain combinations of words. By employing a combination of OpenAI's Codex and Anthropic's Claude Code, Kauffman mapped out the complete index and published his findings on a dedicated website named Swipeblocked.
Key takeaways
- iOS maintains a gray list of 4,513 English-language phrases that predictive text will never suggest.
- The list includes political phrases like Tibetan independence, Kashmir dispute, and united Ireland.
- Apple stated the keyboard is designed to avoid inappropriate or offensive suggestions.
- Users can still type out individual words manually without being actively autocorrected.
How the gray list functions on Apple devices
Unlike a standard blacklist that actively swaps out offensive terms for acceptable alternatives, this gray list operates through omission and resistance. According to the Swipeblocked database, predictive text completely ignores phrases on the catalog even when they represent the most logical next word in a sentence. Furthermore, swipe-typing—the method where a user glides a finger across the virtual keyboard rather than tapping individual keys—frequently fails over these entries. The software will often substitute an entirely different word or alter text that has already been entered into the message field. Apple explained to Reuters that the keyboard design specifically aims to steer clear of offering potentially inappropriate or offensive suggestions, though the tech giant declined to comment on why individual phrases made the cut. The company emphasized that individuals retain the freedom to type whatever terms they choose and can manually override predictive text recommendations.
Political exclusions and curious discrepancies
The catalog spans a wide variety of topics, ranging from standard profanity and drug references to geopolitical phrases and cultural terms. In line with conventional Silicon Valley moderation policies, political subjects such as Tibetan independence, the Kashmir dispute, and a united Ireland are entirely excluded from predictive suggestions. Language-specific proscriptions also appear in the data, including phrases translated as Israeli aggression, the occupied territories, and Taiwan independence. Other entries feature striking dichotomies, such as blocking bad girl while permitting bad boy, or allowing black man while omitting white man. Additionally, read gay smut is blocked while read smut remains acceptable, and the full name of Trayvon Martin is present on the catalog.
Public access and overall catalog scope
The full English-language catalog contains 4,513 items, which are now publicly viewable for anyone curious about which terms trigger Apple's predictive restrictions. While the repository contains predictable profanity, drug mentions like smoking weed, and insults, it also houses strange formatting quirks and technical anomalies, such as OS x and iMessage isn’t working. Other entries include repetitive phrasing involving countries, such as Australia is a very bad and Australia is a very poor. While some flagged phrases resist autocomplete entirely, others still appear when entered via swiping, demonstrating that the system's enforcement methods vary across different categories of restricted text.
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