Best AI Keyboard Apps for iPhone

Your iPhone keyboard already has AI in it. The question is whether it's doing anything useful with what you type, or just auto-correcting. This list covers eight of the best AI keyboard apps for iPhone in 2026, ranked by what they actually change about your output.

• Best for everyday users: Microsoft SwiftKey or Gboard – free, Microsoft Copilot or Google Search built in.
• Best for professional writing: Grammarly Keyboard – premium-grade grammar and clarity checking that catches what other keyboards miss.
• Best 2026 newcomer: CleverType – 4.7-star App Store rating across 34,000+ reviews, on-device privacy, one-tap tone change.
• Best free system-level option: Apple Intelligence Writing Tools – built into iOS 18 on iPhone 15 Pro and the iPhone 16 series. Friendly / Professional / Concise rewrite, no third-party install required.
• Bonus: SpeakON pairs a MagSafe hardware button with an iPhone app to deliver voice-to-polished-text in one press.

In this guide, we cover what AI keyboard apps actually do, how the top eight compare, and how to pick the one that best fits how you communicate.

An AI keyboard app for iPhone is a third-party input tool that replaces or extends your built-in keyboard with AI-powered features.

At the basic end, that means smarter autocorrect and next-word prediction. At the advanced end, it means voice-to-polished-text, tone control, real-time grammar checking, and output that lands directly in whatever app you have open – no copy-pasting required.

The eight apps on this list sit at different points on that spectrum, which is why the right choice depends entirely on what you need the text to do once it leaves your voice or your fingers.

1. Microsoft SwiftKey AI Keyboard

Best for: Everyday users and multilingual communicators.

In practice: A manager who switches between English and Spanish throughout the day – work messages, family texts, and everything in between – without changing keyboard settings once.

SwiftKey has been around long enough to earn genuine trust, and the 2026 update moves it well beyond predictive text. The Copilot integration now lets you rewrite messages in real time: select a draft, choose a tone, and SwiftKey rewrites it before you send.

The multilingual engine handles regional idioms and slang better than most alternatives, and the keyboard learns your vocabulary faster than Apple's default.

Some users report occasional lag when switching between the AI layer and the standard keyboard, though this appears to be intermittent and device-dependent rather than a systemic issue.

2. Grammarly AI Keyboard

Best for: Writers and professionals who need formal accuracy.

In practice: A communications manager drafting a press release on mobile. Every sentence is checked for clarity, tone consistency, and grammar before it goes anywhere near a journalist.

Grammarly's keyboard brings its desktop-grade checking to iPhone – real-time grammar, clarity flags, and style suggestions as you type. It catches things that most keyboards miss, such as passive voice, unnecessary hedging, and sentences that are technically correct but unclear.

Where Grammarly excels is formal, high-stakes writing. Where it's less useful is casual conversation – the feedback level that makes it valuable in professional contexts can feel heavy for quick replies.

3. Gboard

Best for: Google users who want a fast, capable free keyboard.

In practice: A coordinator managing logistics over WhatsApp. Gboard's Smart Compose suggests full sentences based on the conversation, and voice typing handles the rest – hands-free, in a noisy office.

Gboard brings Google Search directly into the keyboard – you can look something up and paste the result without leaving the conversation. The 2026 update added Smart Compose 2.0, which suggests full sentences based on your personal writing style, and improved voice typing that filters background noise more effectively than earlier versions.

It's free, requires almost no setup, and covers the basics well. For users who need advanced rewriting or tone control, it falls short of the dedicated tools on this list. But for everyday communication, it's hard to argue with free.

4. CleverType

Best for: Professionals who want serious AI writing assistance with on-device privacy.

In practice: A consultant drafting client emails between meetings – CleverType corrects grammar, rephrases for tone, and translates inline, without sending text to cloud servers.

CleverType is an iPhone keyboard with 30+ AI tools built in: grammar correction across 40+ languages, one-tap tone change (casual / professional / funny / serious), translation, and ChatGPT integration. Most processing happens on-device, with end-to-end encryption for cloud features.

5. Willow Voice

Best for: Writers and professionals who want voice input with the ability to edit by voice.

In practice: Someone dictating a long Slack message between meetings – Willow turns voice into formatted text and lets you say "make that more concise" without typing.

Willow is an iOS keyboard plus Mac and Windows desktop app for AI voice dictation. Speak naturally and Willow formats your speech into clean text in any app, then lets you edit by voice command – change tone, shorten, or reword without retyping. One subscription covers all platforms.

6. BossAI

Best for: Cross-platform users who want voice dictation with multiple tone options.

In practice: An ops lead switching between Mac and iPhone all day – BossAI keeps the same vocabulary and tone presets across both, and Boss Mode reads what's on screen to suggest contextual replies.

BossAI is an AI voice keyboard for iOS, macOS, and Windows. It transcribes speech in real time, removes filler words, and rewrites text in six different tones with one tap. Boss Mode reads your active screen to generate contextual replies without copy-pasting.

7. dictate.

Best for: Users who want voice typing on iPhone without a hardware accessory.

In practice: A multilingual professional dictating in Arabic and getting clean English output in WhatsApp – dictate. handles real-time translation in addition to transcription.

dictate. is a custom iOS keyboard built around AI voice typing. Tap the mic, speak in any language, and the text appears formatted and punctuated in any app. Real-time translation lets you speak in one language and output in another without app switching.

8. Apple Intelligence Writing Tools

Best for: iPhone 15 Pro and iPhone 16 owners who want free, system-level writing assistance with no third-party install.

In practice: A user drafting a sensitive email in Mail – highlight the text, tap Apple Intelligence, choose Friendly / Professional / Concise, and get a rewrite without leaving the app.

Apple Intelligence Writing Tools is built into iOS 18 and works system-wide across Apple's apps and most third-party apps. Highlight any text, tap Writing Tools, and choose Rewrite (with Friendly / Professional / Concise modes), Proofread (grammar and clarity with explanations), or Summarize (paragraph, list, table, or key points). On-device for many tasks; Private Cloud Compute for heavier workloads.

The right app isn't the one with the most features – it's the one that fits the gap between what you say and what you need to send.

If you have an iPhone 15 Pro or 16 series, start with Apple Intelligence Writing Tools: it's free, built-in, and covers most rewriting needs without any setup.

If accuracy matters more than speed, such as in formal reports, press releases, and anything that gets scrutinized, Grammarly Keyboard brings desktop-grade checking to iPhone.

If on-device privacy is a hard requirement and you want serious AI features, CleverType processes most data locally without cloud uploads.

If you want voice input that lets you edit by voice without typing, Willow Voice or BossAI are the strongest software-only options.

Before you commit to an AI keyboard app, it's worth knowing which features actually matter for how you communicate.

Output quality

Does the app give you a raw transcript, or text that's shaped and ready to use? For professional communication, the gap between these two factors is significant.

Where the text lands

Some apps produce output inside their own interface, and you still have to copy and paste it wherever it needs to go. Others deliver text directly into whatever app you have open. If you're switching apps to retrieve your output, that's friction the tool should be removing.

Tone control

Basic AI keyboards predict your next word. More advanced tools let you choose how the output sounds – casual, professional, formal – before it's generated. For anyone communicating across different contexts in a single day, that control matters.

Privacy

If your work involves confidential information, check whether the app processes audio on-device or sends it to cloud servers. For apps like CleverType and Apple Intelligence Writing Tools, most processing happens on-device. For Grammarly, SwiftKey, and Willow, voice and text are processed in the cloud – check each app's privacy policy if you're handling sensitive material. SpeakON is SOC 2 Type II and HIPAA-compliant, with audio processed and discarded after transcription.

Not always – and the distinction matters before you download anything.

Apps like SwiftKey and Gboard replace your iPhone keyboard directly. You install them, set them as your default in Settings, and they take over from Apple's built-in keyboard entirely. Everything you type goes through them – autocorrect, suggestions, AI rewrites, and more. For most people, this is the smoothest transition: one keyboard, all features, no extra steps.

Grammarly works slightly differently. It functions as a keyboard replacement, but it also runs as a writing overlay across other keyboards, flagging grammar and clarity issues as you type in any app. You can run it alongside your default keyboard or swap to it entirely, depending on how much checking you want in your workflow.

CleverType and dictate. both install as full keyboard replacements. CleverType sits in your keyboard tray like any standard keyboard, but with a toolbar of AI tools above the keys, including tone change, translation, and grammar, available on every tap. dictate. replaces the keyboard with a mic-first interface, so rather than a traditional key layout, you're tapping to speak and the text populates directly.

BossAI and Willow Voice work similarly, replacing your keyboard and adding a voice-first layer on top. The main difference between them and dictate. is editing: both BossAI and Willow let you change the output by voice after it's been generated, without going back to typing.

Apple Intelligence Writing Tools don't replace your keyboard at all. They sit above it, available in any text field on iPhone 15 Pro and the iPhone 16 series. Highlight text, tap Writing Tools, and you get rewrite, proofread, or summarize options – the keyboard you're using underneath stays exactly as it is.

SpeakON takes a different approach entirely. Rather than replacing your keyboard, it adds a layer on top of whatever app you're already in. Press the MagSafe button, speak, and polished text lands directly in the active text field – no keyboard switching, no interface to navigate.

Most AI keyboards improve what you type. SpeakON takes a different approach by pairing a MagSafe hardware button with an iPhone app to deliver voice-to-polished-text without typing at all.

Best for: Professional communicators who want the lowest-friction path between thinking and sending.

In practice: A partner at a VC firm between back-to-back meetings. Portfolio update drafted, LP email handled, Slack thread replied to – all while walking between rooms. None of it typed.

Press the MagSafe button, speak, and the finished text lands directly in whatever app you have open. The differentiator is Attune, SpeakON's tone engine. You select a mode – Off, Casual, Professional, or Formal – before speaking, and the output is shaped accordingly. The same sentence comes out differently depending on whether it's going to a Slack thread or an investor email.

The Smart Polish feature removes filler words and run-on sentences before the text reaches you, while Smart List converts spoken tasks into structured, formatted lists. SpeakON also includes a real-time Translation feature for multilingual communication.

Key Features: Smart Polish (AI voice cleanup), Attune tone modes (Off / Casual / Professional / Formal), Smart List, real-time Translation, dedicated MagSafe hardware mic.

Pros:

• An independent, dedicated microphone: does not occupy your iPhone's system mic, freeing it for calls, voice apps, and multitasking. Because iOS isn't running its built-in mic in the background, iPhone battery drain from voice input is significantly reduced compared to software-only voice keyboards.
• Hardware-isolated activation: a single button press works even with the phone locked, with no iOS system mic permissions to navigate and no background-mic restrictions to work around.
• No app switching, no copy-paste, no keyboard switching: polished text lands directly in whichever iOS app is active when you press the button.
• Attune tone engine: the same spoken sentence adapts to four context-specific modes (Off / Casual / Professional / Formal) before the text reaches the destination app.

Cons (current at launch, with the team actively iterating via firmware updates):

• Battery life varies with usage intensity: heavier daily users may want to top up more often. The team is actively optimizing battery efficiency through ongoing firmware updates, with several already shipped since launch.
• Free app-only tier limits Attune mode frequency. The Pro plan ($9/month billed annually, or $12/month month-to-month) unlocks unlimited Attune use plus advanced features.

Pricing: SpeakON Device $129 / SpeakON Device + 1-year Pro Plan $199. Free app-only tier available.

Try SpeakON →

There's no single winner – the best keyboard depends on what you need.

For most users, Apple Intelligence Writing Tools (free and built into iPhone 15 Pro+) is the strongest default choice. If you need unlimited offline AI, Google AI Edge Eloquent is a solid alternative, while Grammarly Keyboard is better suited for grammar-heavy professional writing. For a completely hands-free experience – from voice to polished text without typing – SpeakON's MagSafe hardware button sits in a category of its own.

Are AI keyboard apps safe to use on iPhone?

Most handle data responsibly, but the specifics vary. For apps like CleverType and Apple Intelligence Writing Tools, most processing happens on-device. For Grammarly, SwiftKey, and Willow, voice and text are processed in the cloud. Check each app's privacy policy if you're handling sensitive material. SpeakON is SOC 2 Type II and HIPAA-compliant, with audio processed and discarded after transcription.

Can I use an AI keyboard app in any iPhone app?

Yes, once installed, a third-party keyboard is available across all apps with a text field. This includes Messages, Mail, Slack, WhatsApp, and more. You simply select it from the keyboard switcher.

Do AI keyboard apps work offline on iPhone?

Most AI keyboards require an internet connection for AI features. SwiftKey's basic prediction works offline, but Copilot rewriting needs a connection. Apple Intelligence Writing Tools handle many tasks on-device on iPhone 15 Pro and 16 series. CleverType also processes most data on-device, including grammar correction and basic tone change. SpeakON requires internet for cloud-based processing but supports offline recording – the device captures voice without phone or Bluetooth and syncs when reconnected.

Can I use multiple AI keyboard apps on my iPhone at the same time?

Yes, iPhone allows you to install and switch between multiple keyboards. You can have SwiftKey set as your default for everyday typing and switch to Grammarly when you need accuracy on something more formal. To manage your keyboards, go to Settings → General → Keyboard → Keyboards, and add or remove from there. Most people settle on one primary keyboard over time, but there's no technical reason you can't run several and switch between them as the context calls for it.

Will an AI keyboard app drain my iPhone battery faster?

Not significantly for keyboard-based apps. They only activate when you're typing. Voice input apps that keep the microphone on continuously can draw more power, which is one reason SpeakON uses a dedicated MagSafe hardware button rather than an always-on mic. The button activates the mic only when pressed, which keeps the battery impact minimal.