# Fastmail vs Zero Inbox

The clearest difference is in-app purchases: Zero Inbox at none against Fastmail's 1. Zero Inbox also leads on iOS requirement (12.0 vs 15.4). Fastmail's advantage is ratings volume (609 vs 3). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Fastmail sells 1 in-app purchase, starting at $6.49 per month. Zero Inbox asks for nothing beyond the download.

Fastmail holds the better App Store score, 3.9 against 3.7. That said, the two scores are not equally well evidenced: Fastmail has 609 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 49% of Fastmail's written reviews are positive against 50% of Zero Inbox's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Fastmail | Zero Inbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (609 ratings)](https://appshunter.io/ios/app/fastmail-email-and-calendar/id931370077/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/zero-inbox/id1457415717/reviews) |
| Number of ratings | **609** | 3 |
| Positive reviews | 48.6% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | Free |
| Size | 21 MB | 27 MB |
| Requires iOS | 15.4 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fastmail Pty Ltd](https://appshunter.io/developer/931370076) | [Launch Platform LLC](https://appshunter.io/developer/1586861720) |

## What reviewers say

### Fastmail

[App page](https://appshunter.io/ios/app/fastmail-email-and-calendar/id931370077)

This app offers a privacy-focused email, contacts, and calendar experience with powerful tools for organization and communication. It provides features like offline access, advanced search, and customizable actions to streamline your workflow. Enjoy a secure and ad-free environment designed for efficient personal and professional use.

**Highlights:** Offline email, contacts, and calendar access, Powerful search with attachment indexing, Inbox decluttering tools (snooze, mute, block spam), Customizable swipe gestures, Shared calendars for planning, Secure, private, and ad-free experience

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fastmail Monthly Plan | $6.49 | per month |

**What reviewers like**

- 🚀 Fast and efficient
- 🔒 Secure and private
- 👍 Intuitive and easy to use
- 🔥 Excellent email service
- 💯 Great customer support

**What reviewers complain about**

- 🐛 Buggy app with frequent crashes
- 🔍 Lacking offline support
- 🔀 Confusing navigation and UI
- 🔋 Poor battery life
- 💤 Slow app performance

**Reported bugs**

- Blank screen on app launch
- Notification badges not updating correctly
- Delayed email delivery
- Unreliable swiping gestures
- Disappearing toolbar buttons

**Requested features**

- Offline email access
- Customizable notification sounds
- Integration with native iOS apps
- Dark mode support
- Multiple account management


### Zero Inbox

[App page](https://appshunter.io/ios/app/zero-inbox/id1457415717)

This email application streamlines inbox management with customizable multi-action swipe gestures. Effortlessly process emails by assigning multiple tasks to a single swipe, such as archiving, trashing, or sending to a to-do list. Enjoy a fast and intuitive email experience.

**Highlights:** Multi-action swipe gestures, Customizable swipe actions, Fast loading speed, Integration with Todoist, Smart avatar loading, Dark mode

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fastmail free?

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

### Is Zero Inbox free?

Zero Inbox is free to download, with no in-app purchases.

### Which has better reviews, Fastmail or Zero Inbox?

Fastmail is rated higher. Fastmail averages 3.9 out of 5 from 609 ratings, while Zero Inbox averages 3.7 from 3 ratings.

### Do Fastmail or Zero Inbox have ads?

Neither Fastmail nor Zero Inbox shows ads.

### Which is updated more often, Fastmail or Zero Inbox?

Fastmail ships an update every 3 weeks, and Zero Inbox every 3 weeks. Most recently, Fastmail was updated on November 6, 2026 and Zero Inbox on November 2, 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.*