Best AI Email Apps for iOS and Android in 2026
Most roundups of AI email apps are really roundups of AI email websites, tested on a laptop, with a line at the end noting that a mobile app exists. That gap matters, because the phone is where triage actually happens. You clear mail in a queue, in a lift, between meetings, and the tool either helps in those ninety-second windows or it does not.
This is a documentation-based comparison, not a hands-on speed or reliability benchmark. We reviewed each vendor’s current pricing, mobile-support pages, help documentation, and release notes on August 10, 2026. We compared native iOS and Android availability, documented mobile AI features, triage controls, integrations, and offline behavior. Where a vendor did not document a capability, we did not assume desktop parity.
Prices were checked on each vendor’s pricing page on August 10, 2026. Monthly prices are shown where available; annual-only products are labeled as such.
Quick comparison
| App | iOS | Android | Free access | Paid AI entry |
|---|---|---|---|---|
| Spark Mail | Yes | Yes | Free client; limited AI access | Plus $10/user/month |
| Shortwave | Yes | Yes | Free with AI limits | Pro $18/month |
| Superhuman | Yes | Yes | No ongoing free plan | Starter $30/member/month |
| Missive | Yes | Yes | 30-day trial | Starter $18/user/month |
| Gmail with Gemini | Yes | Yes | Some consumer AI features are free | Varies by account and plan |
| Outlook Mobile | Yes | Yes | Free client | Requires eligible Microsoft AI access |
| Canary Mail | Yes | Yes | Free client; AI requires Growth | Growth $36/year |
| SaneBox | Optional app | Service works in any client | 14-day trial | Snack $9.49/month |
Spark Mail
Spark has the broadest documented low-cost mobile feature set in this group: unlimited accounts and a unified inbox on Free, configurable swipe actions, a built-in calendar on iOS and Android, and paid integrations that turn emails into tasks or notes in services including Asana, Todoist, Trello, and Notion.
Plus costs $10 per user monthly and adds the full paid AI allowance and 40 monthly AI meeting notes. Pro costs $20 monthly and adds unlimited AI meeting notes and desktop HubSpot logging. Workflows remain marked “SOON,” while Auto-Labels and Auto-Drafts are limited closed betas rather than generally available features.
Based on documented features rather than a speed test, Spark is the strongest default for users who want a free unified inbox, configurable swipes, calendar access, and optional task integrations.
Shortwave
Shortwave carries its AI Assistant onto both iOS and Android, including natural-language search within the history allowed by the plan and Google Calendar actions.
The free Individual tier caps search history at 90 days, considers a maximum of 15 threads per AI search, and appends a “Sent with Shortwave” signature to outgoing mail. Pro is $18 per month. On Business and above, AI integrations can update HubSpot and act in tools such as Notion, Slack, Asana, Linear, and Zapier; Shortwave documents those integrations on Android, web, and desktop, but not iOS. Broader 24/7 automation uses its separate Tasklet product.
Superhuman
Superhuman has dedicated iOS and Android apps with mobile command navigation, swipe triage, calendar workflows, and replies from notifications. Its keyboard-shortcut system remains desktop-specific, so mobile-first buyers should decide whether the remaining features justify the price.
Starter is $30 per member per month billed monthly, $25 annual. Auto Drafts, Ask AI, Custom Auto Labels, HubSpot, and Salesforce sit on Business at $40 monthly or $33 annually. Salesforce record creation and editing are documented as desktop-only, which matters when evaluating the mobile app specifically.
Missive
Missive is built around team inbox work: internal threads, assignments, collaborative drafts, and shared accounts are available across web, desktop, iOS, and Android. Mobile users can open linked integration panels from a conversation.
Starter is $18 per user per month billed monthly, $14 annual. Productive is $30 monthly or $24 annual and adds rules, automations, API access, and external integrations spanning CRM, project management, billing, and automation tools.
The built-in apps
Gmail itself is free, and some Gemini features—including thread summaries and Help me write in supported regions and languages—are available to personal accounts. Paid Google AI and eligible Workspace plans expand access. Availability depends on account type, region, language, smart-feature settings, and Workspace administrator controls. Gemini in Gmail can also inspect Drive and Calendar data and create Calendar events, so it is not confined to the mailbox.
Outlook Mobile is free, but Copilot access depends on the account and license. Personal and Family plans can supply AI credits, while work and school accounts need eligible Copilot access. On iOS and Android, Copilot can draft, coach, and summarize email. Outlook also schedules meetings, and Microsoft documents CRM and ERP context for eligible Copilot for Sales users.
Which assistant can hit send depends on your mail provider. ChatGPT covers both sides, sending from Gmail and Outlook alike on paid plans. Claude sends through Outlook and Microsoft 365 but only drafts in Gmail. Both show you the message before it leaves.
Canary Mail offers optional AI, local storage and processing, and paid security features. Free covers the core client; Growth costs $36 annually and adds AI Copilot, scheduling, and integrations. Canary connects to Asana and Todoist, including Todoist task creation from iOS. Calendar support is full on Apple devices, limited to Gmail on Windows, and unavailable on Android.
Where mobile email stops—and where it does not
These apps do not share one hard boundary. Spark creates calendar events and tasks from mobile. Shortwave manages Google Calendar on both mobile platforms and can update HubSpot from Android on Business. Missive exposes CRM, project, billing, API, and MCP integrations, including linked panels on mobile. Canary creates Asana and Todoist tasks, while Gmail and Outlook both act on calendars. Superhuman can update Salesforce records, although that integration is desktop-only.
The real distinction is breadth and autonomy. Most clients support a defined set of manual or prompted actions, often with plan and platform restrictions. If an incoming message must trigger a multi-step process across CRM, invoicing, scheduling, and other systems without someone opening the app, a broader automation layer is the better fit.
The part that runs whether your phone is open or not
Carly is not a mail app you install and read messages in. It is also not the only product here that connects to other systems. Its advantage is that the connection layer is broader and event-driven: work can start when a message arrives and continue across the rest of the stack without someone invoking a supported action inside the client.
Because it fires on events rather than a clock, the work happens when the message lands rather than when you next sit down.
The unattended-work gap closed when ChatGPT and Claude Cowork added scheduled runs. Their standard schedulers still start from the clock, not arbitrary events in connected apps; API-triggered ChatGPT Workspace Agents require an external event detector and caller.
That is the difference that matters on mobile specifically: the message arriving while you are away from your desk gets acted on anyway.Reach is what makes that possible. Carly connects natively to around 260 apps across more than 45 categories, and anything else with a public API connects with your own key. So the invoice, the CRM update, and the scheduling all happen without you opening anything.
Pricing is free Zapier-style workflows, with AI agents from $35/month. If you want to check it against your own stack first, book a call with the team.
Spark Free plus Carly’s free Zapier-style workflows covers both layers without pretending they are the same product: a phone client for reading and a trigger-based workflow layer for downstream actions.
For the desktop-first view of this category, our best AI email clients roundup goes deeper on the interface layer, and best AI assistants for multiple email accounts covers the unified-inbox problem specifically.
FAQ
What is the best AI email app for iPhone?
Based on documented features rather than a hands-on speed test, Spark is the strongest default for users who want a free unified inbox, configurable swipes, calendar access, and optional task integrations. Canary is the more privacy-focused Apple option, while Missive is designed for shared-inbox teams.
What is the best AI email app for Android?
Spark, Shortwave, Superhuman, and Missive all ship native Android apps. Shortwave is notable because paid AI integrations can act in external systems from Android. Canary’s Android client lacks the calendar feature available on Apple devices. SaneBox does not need an Android app for its core sorting because it operates on the mail server.
Are there free AI email apps?
Shortwave Free includes a limited AI Assistant, while Spark Free includes limited AI access with an unpublished quota. Some Gemini features are free for eligible personal Gmail accounts. Outlook Mobile is free, but Copilot requires eligible AI credits or licensing. Canary’s Free plan excludes AI Copilot; Growth starts at $36 per year. Missive and SaneBox offer trials rather than ongoing free plans.
Do AI email apps work offline?
Offline behavior varies. Canary supports reading downloaded mail and composing offline drafts, but its AI needs connectivity. Missive documents limited offline support. SaneBox sorting runs server-side whether the phone is online or not, and server-scheduled actions such as Spark Send Later can complete after the app closes. Do not infer offline AI support unless the vendor documents it.
Can an AI email app update my CRM?
Sometimes. Shortwave Business can update HubSpot through AI integrations; Superhuman Business can create and update Salesforce records on desktop; Missive connects to multiple CRMs and exposes their actions in its inbox; Spark Pro can create a HubSpot contact while logging an email on desktop. Support varies by product, plan, and mobile platform. Carly is the better comparison when the requirement is an event-triggered workflow spanning many applications rather than one client’s supported CRM action.
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