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Spark Mail: AI Email Assistant

by Readdle Technologies Limited

  • Productivity
  • Free
View on the App Store
Rating
4.6
82.7K ratings · US storefront
Top 37%among 144 Productivity apps
Last update
Oct 24, 2026
Version 3.20.3
Size
411 MB
Category
Productivity
Tracked since
Oct 9, 2026

Estimated revenue

A model estimate with a likely range, not a reported figure.

No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.

How this estimate is made

Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.

Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.

Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.

Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.

Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.

Full method

Screenshots

As shown on the App Store listing.

About this app

Text from the App Store listing.

Manage priorities, not emails.
Spark brings every account into one inbox and automatically surfaces what matters most — so nothing slips through the cracks. Loved by millions and named "Best of the App Store" by Apple.

"It's a combination of polish, simplicity, and depth." — FastCompany
"You can create an email experience that works for you." — TechCrunch

EVERY ACCOUNT, EVERY EMAIL, IN ONE PLACE
Connect Gmail, Outlook, iCloud, Yahoo, AOL, Hotmail, GMX, and any IMAP account in a single unified inbox.

STAY ORGANIZED WITH SMART INBOX
Important emails from real people rise to the top. Newsletters and notifications stay neatly grouped below, out of your way.

GET MORE DONE WITH EMAIL ESSENTIALS
Mark emails as done or set them aside for later
Mute threads you're no longer following
Schedule emails to send later — even if your device is off
Find anything fast with Smart Search and Smart Folders

PROTECT YOUR INBOX WITH GATEKEEPER
Pre-screen new senders and block unwanted contacts instantly.

PRIORITIZE WHAT MATTERS
Mark important senders so their emails always stay on top. Group emails by sender or domain to keep your inbox clean.

WRITE FASTER WITH SPARK +AI
Summarize long threads, draft replies, rephrase messages, and adjust tone. Your AI Assistant helps you clear your inbox, translate emails, and keep projects moving.

MANAGE YOUR CALENDAR AND MEETINGS
Connect your calendars to stay on top of your day in one app.

CONNECT YOUR FAVORITE TOOLS
Link Spark to Notion, Asana, Things, and 10+ integrations to act on everything in your inbox.

COLLABORATE WITH YOUR TEAM
Co-author emails and discuss in private comments
Assign messages so everyone knows who owns what
Share secure links to specific emails
Track read receipts to keep work moving

SECURE AND PRIVATE
Spark encrypts your data, runs on Google Cloud's secure infrastructure, and is fully GDPR compliant.

TRY IT FREE
Stick with our powerful free plan, or try Spark Plus or Spark Pro free for 7 days.

Download Spark and reclaim your day.

FAQ

Is Spark the best email app for managing multiple accounts?
Spark brings Gmail, Outlook, iCloud, Yahoo, and any IMAP account into one unified inbox, so you can manage every email in one place instead of switching between apps.

How is Spark different from Apple Mail and Gmail?
Spark helps you focus on what matters, not just read email. It automatically prioritizes messages from real people, keeps newsletters out of the way, and can summarize, draft, and follow up so less falls through the cracks.

How does Spark help with email overload?
Spark surfaces important messages first, lets you snooze emails until you're ready, and helps you reach Inbox Zero without the grind. Higher plans flag what needs attention so nothing gets missed.

Does Spark have AI features?
Yes. Spark uses AI to write faster, reply clearly, and summarize threads. On Plus, AI helps you make better inbox decisions. On Pro, it acts on your behalf — drafting, organizing, and following up.

Is Spark good for team collaboration?
Yes. Teams can share drafts, comment privately, assign messages, and manage shared inboxes — no forwarding chains. Collaboration is available on Pro.

Can I schedule emails to send later?
Yes. Schedule any email to send at the right time, or snooze incoming messages to return when you're ready.

Is Spark free?
Yes. Spark is free to download and use. Spark Plus is for professionals who want a more focused inbox; Spark Pro is for those who need Spark to handle follow-through so nothing gets missed.

Is Spark available on Mac, iPhone, and iPad?
Yes. Spark works on iOS, iPadOS and macOS, and stays in sync across all your devices.

Spark is made by Readdle.

Terms of Service: https://sparkmailapp.com/legal/terms
Privacy Policy: https://sparkmailapp.com/legal/privacy-app
Help: [email protected]

What’s new

Release notes for the latest version, as written by the developer.

v3.20.3

Spark is ready for iPhone Duo from day one!
See your inbox and the open message side by side. Closed, open, or partially folded, you get the same actions and content. Unfold your iPhone Duo to get more room for reading, writing, search, and calendar. Update now and let us know what you think!

Rank history

Daily position in the Netherlands charts. #1 is at the top.

Best rank
#34
Current rank
#79
Days charting
7 of 7

On the charts today

Small & simple score

How realistic it is for a small team to build something like this.

45/100

Not flagged as small & simple

  • Developer size0% · 25

    Developer: 6 apps on the charts

  • Audience size0% · 20

    Ratings: 82,714

  • App size25% · 10

    Size: 411 MB

  • Price model80% · 15

    Price model: free with in-app purchases

  • Demand proof100% · 30

    Best rank #4, 86 countries

An indicator, not a fact. We can't see team size. Calculated Oct 25, 2026 · method i2

How the score works

Version history

  • 3.20.3LatestReleased Oct 24, 2026
  • 3.20.0Released Oct 15, 2026
  • 3.19.32Released Oct 8, 2026