Comparison

KeyFlow AI Keyboard & Writer vs ProPrompt Keyboard

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

Head to head
About

KeyFlow AI Keyboard & Writer

Enhance your typing experience with AI-powered writing assistance directly from your keyboard. Correct grammar, adjust tone, translate text, and generate content seamlessly across various apps. Save time with custom snippets and personalized AI actions.

Highlights
  • AI grammar and spelling correction
  • Tone adjustment (professional, friendly, casual)
  • Text translation (English/Spanish)
  • Sentence rewriting and shortening
  • Customizable AI actions and snippets
  • Dictation with transcription
Features
Read full description

Type it messy. Send it right. KeyFlow is an iPhone keyboard with AI writing tools in the row above your keys. Write your message the way you'd say it, then tap once to fix the grammar, make it shorter, change the tone or translate it. Every change is highlighted before it replaces your text, and the original is one tap away. ONE ROW, EVERY APP • Fix Grammar: spelling, punctuation and grammar. • Improve Writing and Make Shorter. • Change Tone: professional, friendly, casual or formal. • Translate between English and Spanish. • Explain This and Ask AI, without leaving the chat. • Snippets: save the lines you type every week and send them in one tap. • Your own actions: write a prompt once and it becomes a button. WRITE IN YOUR LANGUAGE AI actions reply in the language you wrote in, so they work in many languages. Typing, autocorrect and predictions are in English and Spanish; switch with the globe key. FIX JUST ONE SENTENCE Select a sentence and KeyFlow rewrites only that part. The rest of your message stays exactly as you wrote it. PREFER TO TALK? Record in the KeyFlow app and use the transcription in your writing. Dictation needs microphone access and an internet connection. START FREE Eligible installs include a limited AI trial and the full keyboard. Choose KeyFlow Pro for managed AI with nothing to set up, or Lifetime BYOK: pay once and use your own OpenAI API key, billed by OpenAI separately. Pro has usage limits. Plans, limits and your local price are shown in the app before you buy. Restore purchases at any time. YOU DECIDE WHAT'S SHARED Ordinary typing shares nothing with AI. An AI action sends the text you selected to OpenAI (with nothing selected, the current field); dictation sends the recorded audio. AI sharing needs your permission and can be turned off in Settings. Keyboard AI also needs iOS Full Access. No KeyFlow account. Works in Messages, Mail, Notes, WhatsApp and other apps with standard text fields. Password fields always use the system keyboard. Support: hello@lumozz.com Privacy: https://keyflow.lumozz.com/privacy.html Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

ProPrompt Keyboard

Features
Read full description

Stop retyping the same prompts. ProPrompt keeps your AI prompts in a custom keyboard so you can insert them anywhere you type, instantly. PROMPTS AT YOUR FINGERTIPS Switch to ProPrompt from any text field and tap to send a prompt straight into ChatGPT, Claude, Gemini, or any other app — no copying, no tab switching. BUILD YOUR LIBRARY YOUR WAY Save prompts by typing, pasting from clipboard, or sharing directly from any app. Color-code them, pin your favorites, and keep everything organized the way you work. WORKS WHEREVER YOU TYPE iPhone and iPad. Notes, Messages, Safari, your AI app of choice — ProPrompt's keyboard is available in any app that accepts text input. PROPROMPT PRO Unlimited prompt uses, available as a monthly subscription, annual plan, or one-time lifetime purchase. Free tier includes 10 prompt uses per day. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

KeyFlow AI Keyboard & Writer4 screens
ProPrompt Keyboard4 screens

Verdict

The call

KeyFlow AI Keyboard & Writer and ProPrompt Keyboard are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. KeyFlow AI Keyboard & Writer sells 3 in-app purchases, starting at $4.99 per month and ProPrompt Keyboard sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
KeyFlow AI Keyboard & Writer versus ProPrompt Keyboard: the parameters behind the verdict, then further details
ParameterKeyFlow AI Keyboard & WriterProPrompt Keyboard
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 11 days—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad — better
Requires iOS18.017.0 — better
Further details — not scored
Size19 MB49 MB
Age rating4+4+
DeveloperLumozzValerii Dmytriiev

In-app purchases

3 purchases

KeyFlow AI Keyboard & Writer

Subscriptions2
  • KeyFlow Pro$4.991 Month
  • KeyFlow Pro$39.991 Year
One-time1
  • KeyFlow BYOK Lifetime$14.99
3 purchases

ProPrompt Keyboard

Subscriptions2
  • ProPrompt Pro3 Days trial$3.991 Month
  • ProPrompt Pro (Annual)$39.991 Year
One-time1
  • ProPrompt Pro (Lifetime Pro)$79.99

Questions

Is KeyFlow AI Keyboard & Writer free?
KeyFlow AI Keyboard & Writer is free to download, with in-app purchases available.
Is ProPrompt Keyboard free?
ProPrompt Keyboard is free to download, with in-app purchases available.
Do KeyFlow AI Keyboard & Writer or ProPrompt Keyboard have ads?
Neither KeyFlow AI Keyboard & Writer nor ProPrompt Keyboard shows ads.

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