The best email apps.

Microsoft Outlook is the top pick for anyone juggling several email accounts across work and personal life who wants one combined inbox and calendar. Most reviewers find it easy to use day to day. A smaller group hits real friction — crashes, trash that won't clear, flagged messages misbehaving — so if your job depends on flags or pins working perfectly every time, weigh that risk before switching.

The filter. Every app here is rated 4.2 or better, has been updated in the last eighteen months, and has no significant number of reviewers reporting it broken. Price is not the rule on this list — some are free, some are not.

Top pick

Microsoft Outlook

Microsoft Corporation

View on the App Store ›

Free4.8★ (9,240,218)Updated Sep 8, 2026unverified

Verdict

Outlook consolidates multiple email accounts and calendars into one app, and most reviewers find it easy to use, but a smaller group reports crashes, trash that won't empty, and flagged or pinned messages that don't display properly.

Best for

Someone juggling several email accounts (work and personal) who wants one inbox and calendar view on their iPhone.

The catch

Some users report the app crashing on open or becoming unusable, and flagged or pinned important messages sometimes failing to show up when filtered, which is a real risk if you depend on those messages for work.

Native app

Yahoo Mail: Your Email & Inbox

Yahoo

View on the App Store ›

Free4.7★ (4,812,688)Updated Sep 11, 2026unverified

Verdict

Yahoo Mail's reviews cluster around broken notifications, sluggish performance, and ads pushed at users who can't easily remove them. That's a rough pattern for an app whose one job is getting mail to you reliably.

Best for

Someone who already has a Yahoo email address and just wants a basic inbox app, not someone choosing an email client fresh.

The catch

Multiple recent reviewers report notifications not arriving reliably for new mail, plus ads inside the inbox that some say can't be turned off without paying.

Native app

Google Docs

Google

View on the App Store ›

Free4.8★ (3,234,267)Updated Sep 14, 2026unverified

Verdict

Google Docs is a straightforward word processor that syncs across devices without fuss, though a handful of users report frozen accounts, print formatting that ignores margins, and general unease about how Google handles their data.

Best for

Someone who already lives in Google's ecosystem and wants to draft resumes, letters, or notes on their phone that stay in sync with their computer.

The catch

A few reviewers report the app freezing when adding multiple accounts and copy/paste or print/export not working as expected, and some flatly distrust Google with their document data.

Native app

Mail

Apple

View on the App Store ›

Free4.6★ (4,444,576)Updated Dec 12, 2025unverified

Verdict

Mail is the built-in, no-frills option for handling multiple email accounts on iPhone, but reviewers report real friction with search, sync, and notifications that a dedicated third-party client might solve better.

Best for

Someone who already uses iCloud and other accounts and just wants one built-in inbox without installing or paying for anything else.

The catch

Several reviewers report unreliable notifications (missed alerts or alerts firing with notifications off) and complain that search and account sync break down, sometimes requiring lengthy support calls to fix iCloud access.

Native app

Gmail - Email by Google

Google

View on the App Store ›

Free4.7★ (2,437,889)Updated Aug 31, 2026unverified

Verdict

Gmail is the widely used, feature-rich mail client many people already have accounts for, but recent reviews describe crashes, broken delete/select functions, and storage upsells creeping into the core experience.

Best for

Someone already deep in the Google ecosystem (Docs, Calendar, Drive) who wants one app tying it all together and can tolerate occasional glitches.

The catch

Multiple recent reviewers report select-and-delete breaking, crashes while drafting replies, and storage/subscription prompts pushing into the inbox experience.

Native app

Who should skip this entirely.

If you only have one email account and never check it outside Apple's built-in app, skip this list entirely. Switching clients adds setup time, sync risk, and new bugs to learn around, for a benefit you may never notice. Just keep using Mail. Also skip this whole category if you're actually looking for a word processor — Google Docs showed up on this list but it is not an email app, and choosing it for your inbox would be a mistake regardless of its rating.

Questions.

Is Outlook better than Gmail for iPhone?Outlook is better if you need to merge multiple accounts and a calendar into one view. Gmail suits people already tied into Google's other apps, but recent reviewers report select-and-delete breaking and storage upsells creeping into the inbox.

Should I just use the built-in Mail app?Mail works fine if you only use iCloud and don't want to install anything else. Reviewers do report unreliable notifications and search or sync problems, so if those are dealbreakers for you, a dedicated third-party client may serve you better.

Is Yahoo Mail worth switching to?Only if you already have a Yahoo address and want a basic inbox. It's not a good pick for someone choosing an email client fresh, since reviewers report unreliable notifications and ads that some say can't be removed without paying.

Why is Google Docs on an email app list?It shouldn't be your answer if you're shopping for email. It's a word processor for drafting and syncing documents, useful if you're already in Google's ecosystem, but it does not send or receive mail.