9 Best Email Apps for iPhone of 2026

Spark is the most complete free email app for iPhone owners who check more than one account. Its free plan connects unlimited Gmail, Outlook, iCloud, Yahoo and IMAP accounts in one inbox, and the Smart Inbox splits mail from real people from newsletters and notifications, so the first screen shows what needs a reply. Gatekeeper lets you screen first-time senders, you can group mail by sender or domain, and scheduled sends go out even if the phone is off. Spark +AI can summarize long threads, draft replies, change tone and translate. In the App Store, Spark Plus costs $10.00 a month or $99.00 a year and Spark Pro costs $20.00 a month or $199.00 a year, with a 7-day trial of either. Pro adds the team tools: shared drafts, private comments, assigned messages and read receipts. The trade-off is that Spark syncs through its own servers on Google Cloud, which privacy-first users may want to avoid.

Apple Mail is already on your iPhone and costs nothing, which makes it the baseline every other app on this list has to beat. It reads iCloud, Gmail, Exchange, Yahoo and Outlook accounts in a single inbox or one mailbox at a time, and it now sorts mail into Primary, Transactions, Updates and Promotions. On iPhones that support Apple Intelligence, Priority Messages pins urgent mail at the top and the app can summarize messages and threads. Scheduled send, snooze and one-tap unsend are built in, VIPs get their own alerts, and Mail Drop lets you send large attachments through iCloud from any account. Mail Privacy Protection hides your IP address and stops senders from seeing when you opened their email, and no third-party company handles your login. What it lacks is depth for heavy users: no sender screening like Spark's Gatekeeper, no team tools and no add-ons for CRM or task apps.

Gmail is the natural pick for iPhone owners whose main address ends in gmail.com, and Apple lets you set it as the default mail app. Google says its filters block more than 99.9% of spam, phishing and malware, and the app adds summary cards for packages, bills, events and travel, a personalized Promotions tab and built-in subscription management to cut down on newsletters. Gemini in Gmail can summarize long emails, help write or refine replies and add events to Google Calendar, though Google notes that some Gemini features need a Google AI subscription. Every Google account comes with 15 GB of storage shared with Drive and Photos, and the cheapest upgrade in the App Store is 100 GB for $1.99 a month. You can add accounts from other providers, but you switch between them rather than reading everything in one merged list, which is where Spark or Apple Mail do better.

Outlook is the strongest iPhone app for anyone whose work email lives on Microsoft Exchange or Office 365, and it also handles Outlook.com, Gmail, Yahoo and iCloud. Mail and calendar share one app, so you can send your free times with a tap and find a meeting slot without switching to another app. Attachments open from OneDrive or Dropbox without downloading, and Word, Excel and PowerPoint files go straight into those apps for editing. The app is free but its App Store listing says it contains advertising; Microsoft 365 Basic at $1.99 a month or $19.99 a year gives an ad-free inbox with 100 GB of mailbox storage and 100 GB of cloud storage. Copilot features such as thread summaries and draft help need Microsoft 365 Personal or Family, which Microsoft says start at $6.99 a month in the US, or a business account with Copilot. People with only personal Gmail or iCloud addresses will find Apple Mail or Spark simpler.

Proton Mail is the pick for iPhone users who want an inbox that its own provider cannot read. Messages are stored with zero-access and end-to-end encryption, emails between Proton users can only be read by sender and recipient, and the open-source apps use OpenPGP and are independently audited. You can send password-protected emails to people outside Proton, and the app blocks email trackers and flags phishing. Offline mode lets you read and write mail without a connection. The free plan gives a @proton.me or @protonmail.com address with 1 GB of storage. Mail Plus raises that to 15 GB with 10 addresses and one custom domain; on Proton's US pricing page it was billed at $29.88 for the first year and $47.88 a year after that when we checked in November 2026, while the App Store charges $5.99 a month. The main limit is that the app only opens Proton accounts, so it cannot replace Apple Mail for a Gmail or iCloud address.

Canary Mail sits between a general inbox app and a security tool. The free plan already connects unlimited accounts from Gmail, iCloud, Outlook, Exchange, Office365 and Yahoo in one unified inbox, with snooze, pinned emails, templates and a lite version of read receipts. Growth, at $3 a month billed yearly at $36, adds the AI Copilot that drafts, replies and summarizes, full read receipts, send later, calendar scheduling and a bulk inbox cleaner. Pro+, at $10 a month billed yearly at $100, adds PGP encryption, SecureSend encryption that Canary labels HIPAA, plus phishing, ransomware and impersonation detection. One license covers macOS, iOS, Windows and Android, and both paid plans can be bought as lifetime licenses. It suits consultants and small business owners who want to know when a proposal was opened. The cost is a busier interface than Apple Mail and a smaller user base, with 8.8K ratings on the US App Store.

Airmail is for Apple users who want to shape their email app around their own habits. It supports Gmail, Exchange EWS, Outlook 365, IMAP and POP3, syncs accounts, labels and preferences over iCloud between iPhone and Mac, and runs on Apple Watch and Vision Pro. Swipes, signatures, aliases and notification schedules are all adjustable, and you can send an email straight to Things, Todoist, OmniFocus, Trello, Evernote, Fantastical or a calendar. Airmail says it does not store your messages on its servers, and privacy mode processes data on the device and blocks tracking pixels. The App Store lists Airmail Pro at $39.99 a year or $7.99 a month, and its listing says Pro covers the unified inbox, multiple accounts, agenda integration and realtime inbox monitoring, so the free download is limited for anyone with more than one address. Its 4.3 App Store rating is the lowest here, with some reviews describing a fiddly setup.

Superhuman Mail is built for people who spend hours a day in email and whose accounts are on Gmail or Outlook. Every email that needs an answer gets an AI draft in your style, every thread gets an automatic 1-line summary, and Write with Voice turns spoken notes into polished emails. Split Inbox sorts incoming mail into custom sections, Auto Archive clears clutter, follow-up reminders flag silent threads and send-time suggestions aim to land your email at the top of a recipient's inbox. Teams can share a live view of an email with comments, see their calendar without leaving the inbox and look up HubSpot and Salesforce records next to a thread. Superhuman says teams on Gmail and Outlook save 4+ hours per person each week. The catch is price and scope: Mail now sits inside the Business tier of the Superhuman suite, its pricing page showed only euros from our location, and it does not open iCloud or IMAP accounts.

Edison Mail is a free iPhone app that focuses on cutting inbox volume. It connects an unlimited number of accounts from Gmail, Outlook, Yahoo, iCloud, Exchange, AOL and IMAP providers into one unified inbox, and its one-tap unsubscribe and sender blocking make short work of newsletters. An assistant pulls out bills, receipts, travel plans and package alerts, though Edison says some of those features only work in the US, UK, Canada, Australia and India. The app blocks targeted ads and tracking pixels and can be locked with Face ID. The business model matters here: Edison says its research business keeps the app free, and the App Store listing explains that commercial emails such as receipts are stored for its assistant and Edison Trends research, with an opt-out in settings. Edison Mail+ adds contact management and phishing protection for 14.99 USD a month or 99.99 USD a year, which is a lot for those extras.