Naturi
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How to Check Text for AI for Free on iPhone
Step by step
- Open the checkOpen Naturi and go to the AI check.
- Paste or import the textPaste the essay or email, open a PDF, DOCX or TXT file, or scan a page with the camera.
- Run the checkTap check. You get an AI-likeness score for the whole text; no subscription is needed for up to 3 checks a day.
- Read the highlightsHighlighted sentences show what reads as machine-written, with plain-language signals such as uniform rhythm, stock phrases and generic claims.
- Revise or humanizeRewrite the flagged sentences yourself, or use Naturi Pro to humanize and compare the new score.
Free to download on the App Store.
Naturi vs other apps
Prices and ratings are App Store listings in the US store checked on 18 October 2026. All apps here pair a humanizer with some form of AI check; we build Naturi, so weigh our column accordingly.
| App | Price | Good at | Limits |
|---|---|---|---|
| Naturi | Free AI check (3 per day). Humanizing is Naturi Pro: $5.99/week with a 3-day free trial, or $49.99/year | Free AI check with sentence-level highlights; Light/Medium/Strong intensity plus tone and writing mode; voice input and file/camera import; 9 interface and writing languages | Humanizing needs Pro (no free humanizes); up to 6,000 characters per request; the AI score is an estimate, not a verdict |
| Humanize AI: Paraphrase Tools (ByteBlast Digital) | Free to download; its App Store page lists in-app purchases from $3.99 to $69.99, including Pro weekly plans | Very large rating base (4.7 from 3,835 ratings), several tones (casual, formal, friendly and more), built-in AI detector, 11 interface languages | Several overlapping Pro products and prices are listed, so check the paywall before subscribing |
| WriteHuman AI Humanizer | Free to download; in-app purchases listed from $5.99/week (Basic) up to $49.99/month (Ultra) | Highest rating of the group (4.8 from 228 ratings), multiple output variations, built-in content scanner, its listing says 40+ languages | English-only App Store interface; higher tiers cost noticeably more |
| Humanize AI - BypassGPT (Neo Apps) | Free to download; Premium Access listed at $4.99, $19.99 and $29.99 | Simple paste-and-convert flow, 4.6 from 1,251 ratings | Marketed around bypassing AI detectors; no detector detail in the listing. Naturi does not promise that outcome |
| Humanize AI Text & AI Detector (abderrahim marari) | Free to download; in-app purchases listed from $2.99/week to $69.99/year | Detector, humanizer, text generation and translation in one app; 11 interface languages; some of the lowest weekly prices | Broader tool set, less focus on explaining which sentences read as AI |
Frequently asked questions
Is the AI check really free?
Yes, up to 3 checks per day without a subscription.
Is the score proof that AI wrote my text?
No. It estimates how AI-like the style is. Human writing can score high and edited AI text can score low.
Does Naturi match what my school uses?
No. Schools use their own tools. Naturi's score is its own and may differ.
What do the highlights show?
The sentences and phrases that read as machine-written, so you can see what to change.
How short can the text be?
The AI check needs at least about 40 words; shorter text is too short to judge.
Can I check a PDF or a photo of a page?
Yes, you can import PDF, DOCX, TXT or scan with the camera; text recognition runs on your device.
What happens after 3 checks in a day?
The free limit resets the next day. Pro raises the daily cap.
Related guides
- Best App to Humanize AI Text on iPhone
- How to Make ChatGPT Text Sound Human on iPhone
- How to Rewrite AI Text in Your Own Voice on iPhone
Free to download on the App Store.