Fastmail vs Zero Inbox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fastmail
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.
- 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
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Email, contacts, and calendars made better Fastmail gives you full control of your communication, with speed, privacy, and tools that work the way you do. The New York Times says: ”If you want something easy to use that isn’t tied to one of the big tech giants, Fastmail is a great option.” Do more with email • Stay connected anywhere – Read, draft, and search offline. • Powerful search – Find anything fast, even inside attachments. Plus, use the Search Refinement Toolbar to quickly add, remove, or adjust filters. • Declutter your inbox – Snooze emails, mute threads, block spam, and unsubscribe easily, and set up rules to automate your flow. • Stay organised your way – Use folders or labels to keep things tidy, and categorize messages without opening them. • Work smarter – Schedule or undo send, add private memos, set VIP-only notifications, and resize images in the compose window. • Custom swipes – Quickly archive, delete, or take other actions with up to four swipe gestures. Your preferences stay consistent across devices. • Easy navigation – One-tap access to mail, calendar, contacts, and settings. Customize the toolbar in Display Options, or hide it altogether. • Faster inbox actions – Select messages by tapping avatars, or using a two-finger swipe for faster multi-select. Smarter calendars • Plan together – Share calendars with family or teams. • Sync seamlessly – Works with Google, iCloud, and more. • Always in sync – Updates instantly across devices, with full time-zone support. Connected contacts • Shared or private address books – Keep context from recent conversations and meetings. Why Fastmail? • Privacy first – No ads, no tracking, no selling your data. It’s your data, not ours. • Secure and trusted – Robust encryption of your data both in transit and at rest. Passkeys and 2FA keep your email private and safe. • No lock-in – Over 20 years delivering better email. People stay because it’s better, not because it’s hard to leave. • Real support – 24/7 online help from real people, no chatbots. • Migrate in minutes – Move mail, contacts, and calendars from your old provider in minutes. Better for everyone – Fastmail supports open standards, keeping email private and usable for all.
Zero Inbox
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.
- Multi-action swipe gestures
- Customizable swipe actions
- Fast loading speed
- Integration with Todoist
- Smart avatar loading
- Dark mode
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Zero Inbox is an email app designed for zeroing your inbox via enjoyable swipe actions. Unlike traditional email's swipe action can only allow one action per swipe, we provide multi-action swipe for each direction, empower you to process your email effortlessly on daily basis. For example, for swiping right, you can choose - Swipe right-down-right to push the email to Todoist - Swipe straight right to archive - Swipe right-up-right to trash We also worked hard to make the app to provide blazing fast loading speed. There are more awesome features to come in the following updates: - Customizable swipe actions - In mail swipe action (like Tinder but for email) - Multi-step swipe (one swipe can do many things like Mark read + Archive + push to Todoist) - Smart avatar (load sender's avatar from known email list or public avatar database) - Dark mode
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Fastmail | Zero Inbox |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (609 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 48.6% of reviews | 50.0% of reviews — better |
| Number of ratings | 609 — better | 3 |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.4 | 12.0 — better |
| Further details — not scored | ||
| Size | 21 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Fastmail Pty Ltd | Launch Platform LLC |
Customer experience
Fastmail
Zero Inbox
Bugs and requests
Fastmail
Reported bugs
5 issues- Blank screen on app launch
- Notification badges not updating correctly
- Delayed email delivery
- Unreliable swiping gestures
- Disappearing toolbar buttons
Requested features
5 requests- Offline email access
- Customizable notification sounds
- Integration with native iOS apps
- Dark mode support
- Multiple account management
Zero Inbox
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Fastmail
- Fastmail Monthly Plan$6.491 Month
Zero Inbox
No in-app purchases









