Best AI Assistant Apps for iPhone and Android in 2026

How We Chose the Best AI Assistant Apps

Searches for the best AI assistant app mix three different things: chatbots you talk to, agents that act on your behalf, and apps built for one job such as meetings. We picked the main example from each group and checked, from app-store listings, vendor pages, and press coverage, which platforms each one actually runs on and what it costs.

• Platform availability: is there a real iPhone and Android app, or only a website?
• What it can do on the phone: voice, camera, connected accounts, and whether it can take actions or only answer.
• Price and free tier: what you get before paying.
• Privacy and control: what you connect, what the app may do without asking, and how your data is used.

Where a vendor page was blocked, we relied on search excerpts and said less. For a deeper comparison of agents specifically, see the best AI personal assistants and agents in 2026.

ChatGPT: Best AI Assistant App for General Use

The ChatGPT app is the default best AI assistant for iPhone for many people. The App Store lists it as free with in-app purchases, for iPhone, iPad, Mac, and more, and it has an Android app and a web version. It handles questions, writing, image generation and editing, photo uploads, and an advanced voice mode for real-time conversation.

Paid plans (Go, Plus, Pro, and Business, as reported in current pricing roundups) raise usage limits and unlock more capable models and agent features. The honest limit: it is a chat assistant first, so it will happily draft your email but you still send it, and what it knows about your calendar depends on what you connect.

Claude: Best for Writing and Long Documents

Anthropic's Claude app is on iPhone and iPad (iOS 18 or later per the App Store), Android, the web, and desktop. The App Store listing describes writing and coding help, web search with citations, photo, PDF, and screenshot analysis, voice conversations, and integration with Google Drive, Gmail, and Calendar. Anthropic's site also describes multi-step tasks that keep running when you close the device.

It is free to start. Pro is listed at $20 per month in the App Store, with higher Max tiers above it. Limit: usage caps on the free tier are tighter than many people expect, and there is no built-in phone number or inbox of its own.

Gemini: Best AI Assistant for Android and Google Users

Gemini is Google's assistant, available in a dedicated iPhone and iPad app (iOS 17.4 or later per the App Store), on Android, and on the web at gemini.google.com. It supports Gemini Live for real-time voice conversations with camera or screen sharing, and connects to Gmail, Calendar, Photos, and YouTube. Google's subscription page lists a free tier, Google AI Plus at $4.99 per month, AI Pro at $19.99, and Ultra from $99.99.

Limit: the App Store listing says the iPhone app does not currently support device actions such as setting alarms or sending SMS directly, so on iOS it is more of an answer engine than a phone controller.

Microsoft Copilot: Best Free Option for Microsoft Users

Copilot has free apps for Android, iPhone, and iPad, and a web version. It answers questions, summarizes, drafts email, and generates images. People who live in Outlook, Word, and Excel get the most out of it, especially through a work or school Microsoft 365 account, where Copilot Chat is included with eligible plans.

Limit: the more powerful Microsoft 365 Copilot is a separately priced add-on for organizations, and consumer and work versions differ. Confirm which one your account actually has.

Meta Muse: Best Personal AI Agent App for Errands

Meta launched Muse on September 8, 2026 as a personal AI agent for US adults, rolling out on iOS, Android, and the web, and also reachable inside WhatsApp. Press coverage describes it handling email, travel booking, form completion, shopping, and bill negotiation, with a free tier and reported Power (about $20) and Max (about $100) plans; Meta itself says only that Muse is free for most needs with paid plans for more.

Meta says apps are opt-in with granular permissions, and also notes Muse may produce inaccurate results or take unexpected actions. Limits: US only at launch, it is new, and its security protections had not been independently validated at the time of coverage. Start with low-stakes tasks. See Instinct vs. Meta Muse for a closer look.

Poke, Instinct, Pally, and Town: Agents You Text Instead of Install

A newer group of personal agents skips the app store. Poke has no standalone app: you sign up with your phone number and text it on iMessage, SMS, WhatsApp, or Telegram. It is free to start, with Pro at $19 and Ultra at $199 per month per poke.com. It is aimed at individuals, not teams. Poke was acquired by Cognition (announced July 23, 2026) and is not expected to change immediately through the end of the year, per TechCrunch; its roadmap after 2026 is not committed. See Poke AI and the Cognition acquisition.

Instinct is a personal assistant you text or call. Its site describes those two ways of reaching it, and we found no standalone mobile app. It launched invite-only in August 2026, and pricing is not published. Pally works over iMessage, WhatsApp, RCS, and Telegram with no app download. Its site lists a permanent free tier (three connected apps, three automations, 15 call minutes a month), Pro at $25, and Max at $100 per month, where Max adds a dedicated phone number and its own email address. Pally launched in July 2026, so expect rough edges.

Town is the one in this group with real apps: a macOS desktop app and an iPhone app, plus web chat, Slack, Telegram, WhatsApp, and iMessage. Each assistant gets its own @town.com address, and actions need your approval by default. The free plan includes 30 chat messages a month and a weekly briefing; its pricing page lists Starter at $15 per month, billed monthly, with higher tiers above it and a discount for annual billing. See our Town review. Limits across this group: credit or usage metering is hard to predict, inbox agents carry prompt-injection risk, and most are consumer or prosumer products rather than business tools. For more on this style, see the best AI assistants you can text.

Grok Bot, Siri AI, and Gemini Spark: Agents From the Big Platforms

Grok Bot from xAI, built with Cursor, launched in beta on August 11, 2026. Each account gets a cloud computer that its bots use to sign into apps and sites without APIs, and its docs list apps for macOS, Windows, Linux, iOS, and Android. It is bundled into SuperGrok and Cursor plans rather than sold alone, with weekly included usage and then on-demand billing; no standalone price is published. See Grok Bot pricing and plans.

Siri AI is Apple's rebuilt assistant, released in beta on September 14, 2026 with a dedicated Siri app, personal context, and app actions. It needs an iPhone 15 Pro or newer (or recent iPad, Mac, Watch, or Vision Pro), starts in English (French, Japanese, Korean, Portuguese, and Spanish are due in October), is unavailable in the EU and China at launch, and is free now, with Apple saying expanded access will eventually require payment. Limits: beta, thin third-party actions, and no business or team layer. Gemini Spark is a background agent in the Gemini app, in beta for Google AI Pro or Ultra subscribers on personal Google accounts (not work or school), excluded from the EEA, Nigeria, Switzerland, and the UK, and available in the Gemini mobile app, the web app, and the Mac app. Google calls it experimental. It asks before high-stakes actions such as spending money or sending email.

Alexa+: Best for the Amazon and Smart Home Crowd

Alexa+ is available through Echo devices, the Alexa app on iPhone and Android, and Alexa.com. Per press coverage, it is included with Amazon Prime and costs $19.99 per month otherwise, with a limited free tier on the app and web.

It suits people who want voice control, home routines, and Amazon shopping in one place. Limit: it is built around Amazon's services, so it is a weaker fit for a work inbox and calendar than the general assistants above.

Perplexity: Best for Research With Sources

Perplexity answers questions with cited sources, and its Comet browser, which includes an assistant that summarizes pages and compares information across sites, is reported to be available on Mac, Windows, iOS, and Android. A free tier exists, and Pro is reported at $20 per month.

Limit: it is a research tool more than a task-doing assistant, and browser-based assistants raise their own privacy questions about what pages and accounts they can see.

Otter: Best Work App for Meeting Notes

Otter records, transcribes, and summarizes meetings, and has iOS and Android apps as well as web access. Its pricing page lists a free Basic plan with 300 monthly transcription minutes, Pro from $8.33 per month billed annually, Business at $19.99 per month billed annually, and custom Enterprise pricing with SSO and SCIM.

Limit: recording other people requires consent in many places, and free-plan caps on minutes and conversation history are tight. See the best AI meeting note takers for alternatives, and tell participants before you record.

OpenAssistant: Best for Work That Involves Other People

We build OpenAssistant, so weigh this entry accordingly. It is an executive assistant with its own name, phone number, and email (or one on your company domain), built for work that involves other people: scheduling across many calendars, multi-person email threads, follow-ups, hand-offs and approvals, and shared tasks. Plain-English workflows can run on demand, on a schedule, or on a trigger. You reach it by phone, iMessage, SMS, WhatsApp, email, or web, so it is less an app to open and more a teammate to text.

It is not a general chatbot replacement, a notetaker, or a smart-home assistant. It is in private beta (request access). See the product page and the Trust Center for details.

How to Choose an AI Assistant App

• You want one app for everything and are not sure: start with ChatGPT or Gemini free tiers and see which answers you like.
• You use Gmail and an Android phone: Gemini fits most naturally.
• You use Outlook and Microsoft 365: Copilot, through your work account where available.
• You write and review long documents: Claude.
• You want an agent to do errands: Meta Muse (if you are in the US) or Alexa+, starting with low-risk tasks.
• You want an assistant you text, with no app: Poke, Pally, or Instinct, knowing Poke's future after 2026 is uncommitted.
• You are on an iPhone 15 Pro or newer and want nothing extra: try Siri AI in beta before adding another app.
• You are drowning in meetings: Otter, with consent from attendees.
• Your work depends on other people's calendars and inboxes: see the best AI assistants for business and the best AI executive assistants.

What to Look for Before You Install

• Permissions: connect only the accounts a task needs, and prefer apps that ask before sending, buying, or deleting.
• Data use: read the privacy settings for whether your chats may be used to improve models, and turn that off if you handle client or health information.
• Work versus personal accounts: do not paste confidential company material into a personal app. See how to know if an AI tool is safe.
• Subscription traps: app-store prices can differ from the vendor's web price, and free trials often auto-renew.

For ideas on what to hand off first, see tasks to automate with AI.