# Spark Mail vs UOL Mail

The clearest difference is rating: Spark Mail at 4.6 against UOL Mail's 4.0. Spark Mail also leads on ratings volume (83K vs 132) and review sentiment (61% vs 40%). UOL Mail's advantage is in-app purchases (none vs 17) and iOS requirement (13.0 vs 16.4). On price, ads and device support there is nothing between them.

Both are free to download. Spark Mail sells 13 in-app purchases, starting at $7.99 per month. UOL Mail asks for nothing beyond the download.

Spark Mail holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Spark Mail has 83K ratings behind it against 132, 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 40% of UOL Mail's.

Spark Mail ships an update weekly, UOL Mail every 3 weeks. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Spark Mail | UOL Mail |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (83K ratings)](https://appshunter.io/ios/app/spark-mail-ai-email-assistant/id997102246/reviews)** | [4.0 (132 ratings)](https://appshunter.io/ios/app/uol-mail/id1372863832/reviews) |
| Number of ratings | **83K** | 132 |
| Positive reviews | **61.1% of reviews** | 40.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#97** | — |
| Size | 393 MB | 60 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Readdle Technologies Limited](https://appshunter.io/developer/285035419) | [UOL Inc.](https://appshunter.io/developer/440898836) |

## What reviewers say

### Spark Mail

[App page](https://appshunter.io/ios/app/spark-mail-ai-email-assistant/id997102246)

**Currently charting:** #97 Top Grossing · Productivity (US App Store)

Streamline your email and calendar management with an AI-powered assistant. Organize multiple accounts, declutter your inbox with smart sorting, and use AI to draft replies, summarize threads, and manage your schedule efficiently.

**Highlights:** Unified inbox for multiple email accounts, AI-powered email summarization and drafting, Smart Inbox for prioritizing emails, Calendar management and meeting scheduling, Gatekeeper for sender screening, Team collaboration on emails, Integrations with productivity apps

**Features:** Family Sharing, Apple Wallet, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Spark Premium | $7.99 | per month |
| Spark Plus Monthly | $10.00 | per month |
| Spark Premium | $11.99 | per month |
| Spark Pro Monthly | $20.00 | per month |
| Get Spark Premium | $41.99 | per year |
| Spark Premium | $59.99 | per year |
| Get Spark Premium | $59.99 | per year |
| Spark Plus Annual | $99.00 | per year |
| Get Spark Premium | $119.99 | per year |
| Spark Pro Annual | $199.00 | per year |
| Regular Powerbank | $4.99 | one-time |
| Big Powerbank | $9.99 | one-time |
| Huge Powerbank | $19.99 | one-time |

**What reviewers like**

- 🚀 Excellent email management features
- 👍 Clean and intuitive user interface
- 📂 Effective email organization and categorization
- ⏱️ Efficient workflow with snooze, scheduling, and templates
- 💻 Seamless cross-device experience

**What reviewers complain about**

- 🐛 Occasional sync and stability issues
- 🔒 Concerns over privacy and data usage
- 💰 Aggressive push for paid subscription
- 📥 Unreliable notification delivery
- 🔍 Inconsistent search functionality

**Reported bugs**

- 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**

- 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

[App page](https://appshunter.io/ios/app/uol-mail/id1372863832)

Manage your UOL email account efficiently with this modern and intelligent application. It supports various file types, integrates with other services, and offers intuitive features for streamlined email handling on your iPhone.

**Highlights:** Send email to mobile contacts, Multi-email operations, Undo operations, Swipe to delete emails, Attach files from iCloud, Preview attachments, Print emails

**In-app purchases:** none


## Frequently asked questions

### Is Spark Mail free?

Spark Mail is free to download, with in-app purchases available.

### Is UOL Mail free?

UOL Mail is free to download, with no in-app purchases.

### Which has better reviews, Spark Mail or UOL Mail?

Spark Mail is rated higher. Spark Mail averages 4.6 out of 5 from 83K ratings, while UOL Mail averages 4.0 from 132 ratings.

### Do Spark Mail or UOL Mail have ads?

Neither Spark Mail nor UOL Mail shows ads.

### Which is updated more often, Spark Mail or UOL Mail?

Spark Mail ships an update weekly, and UOL Mail every 3 weeks. Most recently, Spark Mail was updated on November 1, 2026 and UOL Mail on October 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*