Comparison

Spark Mail vs UOL Mail Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Spark Mail

Unify all your email accounts into a single inbox, automatically prioritizing important messages. Streamline your workflow with AI-powered writing assistance, smart organization tools, and seamless integration with your favorite productivity apps.

Highlights
  • Unified inbox for all accounts
  • Smart Inbox prioritization
  • AI-powered drafting and summarization
  • Email scheduling and snoozing
  • Gatekeeper for sender pre-screening
  • Calendar and meeting management
  • Integrations with Notion, Asana, etc.
Features
Read full description

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: support@sparkmailapp.com

About

UOL Mail Pro

Manage your professional emails efficiently with this application. It offers a modern interface, supports various file types, and integrates with other services. Perform multiple operations, undo actions, and manage contacts seamlessly.

Highlights
  • Modern and intelligent interface
  • Supports any file type
  • Integration with apps and services
  • Send emails to phone contacts
  • Multi-email operations
  • Undo operations
  • Swipe to delete emails
Read full description

UOL Mail Pro é um eficiente aplicativo para gerenciamento de e-mail profissional, atualmente está disponível para iPhone. Com sua interface moderna e inteligente ele suporta qualquer tipo de arquivo e possui integração com diversos aplicativos e serviços em seu fluxo de trabalho. Com o UOL Mail Pro você pode: - enviar e-mail para contatos do celular - fazer operações com múltiplos e-mails - desfazer operações - apagar e-mails deslizando - anexar arquivos do iCloud - anexar fotos - pré-visualizar anexos - compartilhar arquivos com outros aplicativos - imprimir e-mails - buscar e-mails na pasta - acessar múltiplas contas UOL Mail Pro - gerenciar contatos

Screenshots

Spark Mail4 screens
UOL Mail Pro4 screens

Verdict

The call

The clearest difference is rating: Spark Mail at 4.6 against UOL Mail Pro's 3.5. Spark Mail also leads on ratings volume (83K vs 31) and review sentiment (61% vs 39%). UOL Mail Pro's advantage is in-app purchases (none vs 10) and iOS requirement (13.0 vs 16.4). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Spark Mail sells 8 in-app purchases, starting at $7.99 per month. UOL Mail Pro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Spark Mail holds the better App Store score, 4.6 against 3.5. That said, the two scores are not equally well evidenced: Spark Mail has 83K ratings behind it against 31, so its average is the more settled of the two. Written reviews point the same way: 61% of Spark Mail's written reviews are positive against 39% of UOL Mail Pro's.

UpkeepUpdate frequency

Spark Mail ships an update weekly, UOL Mail Pro every 3 weeks. The most recent releases landed on November 12, 2026 and November 11, 2026 respectively.

Scorecard8 real differences · 3 level
Spark Mail versus UOL Mail Pro: the parameters behind the verdict, then further details
ParameterSpark MailUOL Mail Pro
PriceFreeFree
Rating4.6 (83K ratings) — better3.5 (31 ratings)
Positive reviews61.0% of reviews — better39.0% of reviews
Number of ratings83K — better31
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
Best chart rank#97 — better—
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS16.413.0 — better
Further details — not scored
Size393 MB57 MB
Age rating4+4+
DeveloperReaddle Technologies LimitedUOL Inc.

Customer experience

Spark Mail

All ratings82,835 ratings
Positive91.2%
Neutral3.3%
Negative5.5%
Written reviews3,203 reviews
Positive61.0%
Neutral10.6%
Negative28.5%

UOL Mail Pro

All ratings31 ratings
Positive54.8%
Neutral12.9%
Negative32.3%
Written reviews82 reviews
Positive39.0%
Neutral14.6%
Negative46.3%

Bugs and requests

Spark Mail

Reported bugs

5 issues
  • Emails disappearing from the inbox
  • Delayed email delivery and sync
  • Crashes and freezes when opening the app
  • Issues with Exchange calendar and account sync
  • Incorrect email grouping and threading

Requested features

5 requests
  • Improved spam filtering and email blocking
  • Option to disable email threading
  • Better calendar integration and management
  • Customizable email signatures and layouts
  • Expanded third-party app integrations

UOL Mail Pro

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Spark Mail

Subscriptions8
  • Spark Premium7 Days trial2 variants$7.991 Month
  • Spark Plus Monthly7 Days trial2 variants$10.001 Month
  • Spark Pro Monthly7 Days trial$20.001 Month
Show 5 more
  • Get Spark Premium7 Days trial$41.991 Year
  • Get Spark Premium7 Days trial$59.991 Year
  • Spark Premium1 Year trial$59.991 Year
  • Spark Plus Annual7 Days trial$99.001 Year
  • Spark Pro Annual7 Days trial$199.001 Year
None

UOL Mail Pro

No in-app purchases

Questions

Is Spark Mail free?
Spark Mail is free to download, with in-app purchases available.
Is UOL Mail Pro free?
UOL Mail Pro is free to download, with no in-app purchases.
Which has better reviews, Spark Mail or UOL Mail Pro?
Spark Mail is rated higher. Spark Mail averages 4.6 out of 5 from 83K ratings, while UOL Mail Pro averages 3.5 from 31 ratings.
Do Spark Mail or UOL Mail Pro have ads?
Neither Spark Mail nor UOL Mail Pro shows ads.
Which is updated more often, Spark Mail or UOL Mail Pro?
Spark Mail ships an update weekly, and UOL Mail Pro every 3 weeks. Most recently, Spark Mail was updated on November 12, 2026 and UOL Mail Pro on November 11, 2026.

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