ChatGPT Detector for iPhone: Free AI Text Detection App

ChatGPT detector apps typically impose word limits, forcing you to split long documents and upload sensitive text to external servers. Slop Or Not is a ChatGPT detector for iPhone with unlimited, private on-device detection.

Not on an Apple device yet? Use the free online AI text detector for a quick browser check, or the iPhone and Mac app for private on-device ChatGPT detection.

AI Text Detector for iPhone (No Word Limits)

Slop Or Not analyzes text on-device to estimate whether it is likely written by ChatGPT (or similar LLMs). Unlike online tools that meter usage, our AI text detector has no word-count limits. Paste long essays or reports in one go and get a clear result in seconds.

What you get:

No word limits - check full documents without chopping them up
Fast results - instant feedback, even offline after setup
Private on iPhone and Mac - your text never leaves your device
English text detection + Text Cleanup - trained on English; removes zero-width spaces, homoglyphs (lookalike characters like Cyrillic 'а' vs. Latin 'a'), and odd punctuation

Slop Or Not detecting ChatGPT-generated text with no word limits

Why No Word Limits Beat Most Online "ChatGPT Detectors"

No word limit: Check long documents without hitting paywalls or token limits.
Private: Nothing is uploaded. Ideal for confidential work (legal, medical, academic).
Fast + reliable: Local models avoid slow queues and stay responsive even offline.

Competitors that often meter or cap text length

GPTZero
Originality.AI
ZeroGPT
Copyleaks
Turnitin

Many online detectors restrict free usage, throttle requests, or impose character limits-forcing you to split documents. Slop Or Not lets you paste entire documents at once.

Signs of ChatGPT-Written Text You Can Spot Yourself

Use this short list to build your own radar before you paste anything into a tool:

Smooth but vague: fluent sentences with few concrete, verifiable details
Repetitive hedges: safe adjectives and qualifiers recurring across paragraphs
Citation fog: references look real but don’t resolve; quotes are hard to verify
Punctuation oddities: strange dashes/quotes, zero-width spaces, or homoglyphs (lookalike characters that appear identical but aren't - fix with Text Cleanup)
Monotone rhythm: similar sentence lengths; little variation in cadence
Stale timelines: confident statements that miss very recent events or updates
Over-tidy structure: every paragraph is neatly balanced, light on personal insight

Pair this checklist with an AI text detector like Slop Or Not for best results.

How To Check Text in the App

Install Slop Or Not from the App Store.
Open once to download on-device models (one-time setup).
From the main screen, tap Paste text and paste your content. There are no word limits.
The app analyzes your text automatically and displays results in seconds. Use the History tab to revisit past checks.
Optional: run Text Cleanup to remove zero-width spaces, homoglyphs (lookalike characters), and odd punctuation before sharing.

Select text in Safari, Mail, Notes, or any app.
Tap Share and choose Slop Or Not.
The app opens with your text and analyzes it automatically to show results.

Text Cleanup: Real Cleanup, Not AI "Humanization"

Many services claim to "humanize" AI-generated text to evade detection. Most web humanizers are one-shot rewrite frontier model wrappers: paste a draft, get a paraphrase, hope the score changes. They often follow simple heuristics like reducing specific adjectives or changing sentence structure, tactics documented in detection research.

Why One-Shot AI Humanizers Struggle With Modern Detectors

A Stanford study on AI-generated academic reviews found that ChatGPT disproportionately uses certain adjectives and adverbs. Words like "commendable," "meticulous," and "intricate" appeared 9.8×, 34.7×, and 11.2× more frequently in AI-written text compared to human writing. The researchers identified systematic patterns in how LLMs construct sentences-patterns that persist across rewrites.

Most one-shot humanizers try to mask these patterns by:

Swapping out telltale adjectives and adverbs
Varying sentence length artificially
Adding filler words or hedging phrases
Running the text through another LLM to "paraphrase"

The fundamental flaw: These tools still use AI models to rewrite text. They're essentially asking one LLM to disguise another LLM's output, usually without a measured feedback loop. Modern AI detectors like Slop Or Not are trained to recognize these rewritten patterns. The "humanized" text often carries new AI signatures that are just as detectable.

The agentic AI Humanizer skill is different because it revises in measured passes and can steer toward a writing sample you provide. It reduces guesswork; it does not promise a pass. For that loop, start with the agentic AI Humanizer guide or the own-voice AI humanizer guide.

How Slop Or Not's Text Cleanup Is Different

Text Cleanup doesn't use AI at all. It's a technical utility that removes hidden artifacts people sometimes insert to manipulate detection:

Zero-width spaces: Invisible Unicode characters inserted between words to break pattern matching
Homoglyphs: Lookalike characters from different alphabets (e.g., Cyrillic 'а' vs. Latin 'a') that appear identical but have different codes
Odd punctuation: Non-standard quote marks, dashes, or apostrophes that signal copy-paste from certain sources
Spelling normalization: Standardizes regional variants to reduce false positives

These are legitimate cleanup operations-removing Unicode tricks and standardizing formatting. Text Cleanup doesn't rewrite sentences, add synonyms, or change meaning. It simply strips out technical artifacts that obscure the true authorship signal.

Key difference: AI humanizers generate new text (which remains AI-detectable). Text Cleanup only removes hidden characters and normalizes formatting-it reveals what's actually there without generating anything new.

If your text is human-written with some formatting artifacts, Text Cleanup helps. If your text is AI-generated and run through a humanizer, our detector will likely still catch it-because rewriting AI text with AI doesn't make it human.

AI Humanizers vs Text Cleanup: Quick Comparison

One-shot web humanizers: Rewrite text with AI; often still detectable; can alter meaning; may upload data; typically metered or capped.
Text Cleanup: No AI rewriting; preserves meaning; removes hidden artifacts only; private, on-device; free with no word limits.

Readability Scores in the Same Tap

Every text check in Slop Or Not also returns an on-device readability score, using the formula that fits the language: English (Flesch Reading Ease, higher is easier to read, plus Flesch-Kincaid Grade Level, an approximate U.S. school grade), German (Wiener Sachtextformel), Spanish (Flesch-Szigriszt), Italian (GULPEASE), Swedish, Danish, and Norwegian (LIX). That covers 7 languages today, with more on the way. The score estimates how hard the text is to read, not whether AI wrote it, and every formula in the lineup is approximate - use it as a quick gauge alongside the AI verdict, not as a standalone measurement.

Accuracy, Languages, and Limits

Our compact, on-device models are fine-tuned on mixed human and synthetic data and updated regularly. Slop Or Not reports 95 percent accuracy on AI-generated text based on internal testing. Accuracy varies with new AI models and methods designed to trick detectors. Text detection currently supports English; broader language coverage is in progress.

FAQ: ChatGPT Text Detector

Is it really on-device?

Yes. After setup, checks run locally and can work offline.

Does it detect ChatGPT text?

It detects patterns typical of ChatGPT-style writing. We continuously update our models for new releases.

Can I check long documents?

Yes. There are no word limits per document on-device.

Who is this for?

Students, educators, journalists, fact-checkers, community managers, and privacy-focused professionals (legal, healthcare, finance).

Free vs Pro?

Free includes 3 checks/day (increases with consistent daily use), and every check returns an on-device readability score in 7 languages alongside the AI verdict. Upgrade to Pro for unlimited checks and features like Incognito mode and Text Cleanup.

Slop Or Not is the only AI content detector that fully complies with all major privacy regulations. Because all analysis happens on-device and we collect no personal data, we meet the requirements of:

EU General Data Protection Regulation (GDPR)
California Consumer Privacy Act (CCPA) and California Online Privacy Protection Act (CalOPPA)
Brazil's General Data Protection Law (LGPD)
Canada's Personal Information Protection and Electronic Documents Act (PIPEDA) and applicable provincial legislation

Because nothing leaves your device, this setup is ideal for professionals who handle sensitive content for work—such as lawyers and doctors—where confidentiality is critical. Slop Or Not also supports HIPAA considerations for on‑device use: we do not transmit or store anything on our servers.

See our Privacy Policy for details.

Detect ChatGPT Text - Privately

Online tools add word limits and upload your data. Slop Or Not runs fully on your iPhone or Mac for fast, private results and no word caps.

Download Slop or Not free for private no-word-cap checks on iPhone and Mac.