Comparison

AI Humanizer vs Klartext

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

AI Humanizer

Enhance your writing with an AI-powered keyboard that offers grammar checking, rephrasing, and tone adjustment within any app. Quickly proofread, rewrite, summarize, and translate text to improve clarity and efficiency in your messages and emails.

Highlights
  • AI-powered grammar and spell check
  • Reword and paraphrase sentences
  • Adjust message tone (Friendly/Professional)
  • Summarize long texts
  • Translate text into multiple languages
  • Integrated into keyboard for all apps
Features
Read full description

Paraphrase tool, AI email writer and grammar checker, built right into your keyboard. Reword any sentence, fix every typo and write emails in seconds. GrammarFix is an AI keyboard that works inside every app: Messages, WhatsApp, Mail, Gmail, Instagram, Slack, Notes and more. Type as usual, tap a tool, and your text is fixed in place. No copying and pasting. WRITING TOOLS ON YOUR KEYBOARD • Proofread: fix grammar, spelling, punctuation and typos in one tap • Rewrite: reword and paraphrase any sentence so it reads clearer • Change Tone: make a message Friendly or Professional • Concise & Expand: shorten long text or add helpful detail • Summary & Key Points: summarize long messages and emails • List & Table: turn messy notes into a clean list or table • Translate: type and translate into English, Spanish, Portuguese, German, French, Italian, Dutch, Polish, Swedish, Turkish, Russian, Korean and Indonesian • Describe your change: tell the AI how the text should sound and it rewrites it for you IN YOUR LANGUAGE The app and the keyboard come in 13 languages: English, Spanish, Portuguese, German, French, Italian, Dutch, Polish, Swedish, Turkish, Russian, Korean and Indonesian. Type on native layouts like AZERTY, QWERTZ, Korean and Russian, with regional versions for French, German, Spanish, Portuguese and Dutch. WRITE BETTER EMAILS AND MESSAGES Draft emails, replies, essays and posts faster. The AI writer keeps your meaning and your language, so it works for students, professionals and non-native English speakers alike. PRIVATE BY DESIGN Full Access is only used to power the writing tools. We never record or store your keystrokes. GRAMMARFIX PRO Unlock unlimited AI writing tools. Choose a weekly or yearly GrammarFix Pro plan. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://natural-card-aed.notion.site/GrammarFix-Privacy-Policy-27a42a91f1b5805d8ef9f5e3c88b0368

About

Klartext

Features
Read full description

Speak instead of typing: tap the mic, talk — polished text lands in any app, in your language. Everything happens on your iPhone: recognition runs on Apple's large speech model right on the device, and AI cleanup removes filler words and slips and sets clean punctuation — powered by Apple Intelligence, right on your iPhone. No account, no server, no tracking: by default, your dictation goes nowhere. For mixed languages and technical vocabulary there's optional cloud recognition with your own key; for cleanup without Apple Intelligence, an online model through your own account with the provider — both clearly labeled, both optional. The Klartext keyboard is deliberately not a second typing keyboard — it's a lean dictation panel: a big mic, space, delete, return, and (with AI cleanup active) your mode right on the keyboard: Message · Email · Note · AI prompt · your own modes. DICTATION THAT DOESN'T CUT OFF Unlike built-in dictation, recording keeps running when you switch apps: the keyboard is just the display, the mic lives in the main app. Look something up, switch apps, come back, tap stop — the text is in your field. And no word gets lost: recordings stay on your device for up to 24 hours — listen again or re-transcribe. Can be turned off. WHY KLARTEXT • Everything on device: recognition and cleanup run locally — on a plane, in a dead zone, in the basement • Private by design: no account, no server, no tracking — by default, your dictation never leaves your iPhone • Recognition that learns: correct a word once and your spelling sticks — dictionary and replacements included • Custom modes: create up to three of your own, each with a line on format and tone — requests like "no emojis" or "all lowercase" work right on the device; pick them on the keyboard, and built-in modes can be renamed (with AI cleanup) • Great for AI prompts: dictate instructions for ChatGPT, Claude, or coding agents — technical terms stay exactly as you said them • Read-aloud as a bonus: Klartext reads copied text aloud, even with the screen locked — pick your voice, optionally OpenAI voices via your own key (clearly labeled) • Widgets and stats: words today and weekly overview • Built in Germany, perfected for German — and takes dictation in many languages • The app is now available in 16 languages FAIRLY PRICED Every week, 2,500 dictated words are free — permanently, no account needed. Only delivered dictations count; read-aloud, history and dictionary never do. If you dictate more, get Klartext Unlimited: one yearly subscription, one price, cancel anytime — no other tiers. The price is shown in the app and applies to your region. The subscription pays for development — there is no Klartext server. If you first downloaded Klartext before version 2.0, you keep everything unlimited, no subscription. WHAT YOUR IPHONE NEEDS Dictation works on any iPhone running iOS 26. On-device AI cleanup needs Apple Intelligence (iPhone 15 Pro and newer) — otherwise an online model through your own account can take over, if you like. Terms of Use (Apple standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://klartext-app.com/privacy.html Imprint & support: https://klartext-app.com/imprint.html

Screenshots

AI Humanizer4 screens
Klartext4 screens

Verdict

The call

The clearest difference is in-app purchases: Klartext at none against AI Humanizer's 4. Klartext also leads on update cadence (every 4 days vs every 2 weeks). AI Humanizer's advantage is iOS requirement (16.0 vs 26.0). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. AI Humanizer sells 4 in-app purchases, starting at $4.99 per 7 days. Klartext asks for nothing beyond the download.

UpkeepUpdate frequency

AI Humanizer ships an update every 2 weeks, Klartext every 4 days. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 6 level
AI Humanizer versus Klartext: the parameters behind the verdict, then further details
ParameterAI HumanizerKlartext
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 2 weeksEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhoneiPhone
Requires iOS16.0 — better26.0
Further details — not scored
Size54 MB13 MB
Age rating4+4+
DeveloperMudasir Hussainsimon heinz

In-app purchases

4 purchases

AI Humanizer

Subscriptions3
  • Pro Weekly$4.997 Days
  • GrammarFix Pro Monthly$9.991 Month
  • GrammarFix Pro Yearly$39.991 Year
One-time1
  • GrammarFix Pro Lifetime$59.99
None

Klartext

No in-app purchases

Questions

Is AI Humanizer free?
AI Humanizer is free to download, with in-app purchases available.
Is Klartext free?
Klartext is free to download, with no in-app purchases.
Do AI Humanizer or Klartext have ads?
Neither AI Humanizer nor Klartext shows ads.
Which is updated more often, AI Humanizer or Klartext?
AI Humanizer ships an update every 2 weeks, and Klartext every 4 days. Most recently, AI Humanizer was updated on October 31, 2026 and Klartext on October 28, 2026.

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