Fastmask vs Inbox Zero
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fastmask
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Fastmask is the companion app for Fastmail users who rely on masked email aliases. Connect your Fastmail account using secure Fastmail login to instantly create, manage, and disable aliases - keeping your real address private, reducing spam, and staying in control of where your messages go. • Secure Fastmail login • Create aliases instantly, including custom email prefixes. • Set local expiration dates for aliases. • Enable or disable aliases anytime to stop unwanted mail. • Bulk actions: manage multiple aliases at once. • Edit existing alias descriptions. • View, search, and open target domains directly from the list. • Tap an alias to quickly copy it—fast and accessible. • Safari Web Extension: Create masked email aliases directly from Safari and send them to the app. • Create aliases via the Shortcuts app for automation and one-tap workflows. • Manage multiple Fastmail accounts in one place with a dedicated sidebar. • Optimized layout for both iPhone and iPad. • Privacy-first design: no trackers, no data sharing, no selling. Upgrade to unlock unlimited aliases, full multi-account support, and all advanced features—seamlessly integrated with Fastmail.
Inbox Zero
This email client offers a fast, offline-capable experience for Gmail and Outlook, featuring an AI assistant for managing your inbox. It allows for easy unsubscribing, smart inbox organization, and quick replies.
- AI email assistant
- Offline access
- Unsubscribe from senders
- Split inbox by tabs
- Quick swipe actions
- Scheduled sending
- Undo send
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Inbox Zero is a fast, native email app for Gmail and Outlook, with an AI assistant built in. FAST, EVEN OFFLINE Your mail is stored on your iPhone, so your inbox opens instantly and stays usable without a connection. Changes sync in the background. SPLIT INBOX Split your inbox into tabs for the mail you care about. Each tab shows its unread count, so you know where to look first. UNSUBSCRIBE IN SECONDS See who keeps emailing you and choose Keep, Auto-archive or Unsubscribe for each sender, one by one or in bulk. Unsubscribing is free. ASK AI Chat with the Inbox Zero assistant from your inbox or any email. Ask about your mail, or tell it how your email should be handled. NEVER MISS A REPLY Get a notification when an email needs your reply, and tap straight into the conversation. TRIAGE WITHOUT FRICTION Swipe to mark done or read, and jump straight to the next email after you archive. Mark a whole list done at once, and choose your own swipe actions. WRITE AND REPLY Reply inline with attachments, photos and dictation. Drafts show up in your list and open right where you left off. Schedule messages with Send later, and undo a send for 30 seconds. ALL YOUR ACCOUNTS Connect several Gmail and Outlook accounts and read them together or one at a time. BUILT FOR IPHONE A Liquid Glass design, emails that stay readable in dark mode, and remote images loaded through a privacy proxy. Inbox Zero requires a paid subscription. New users receive a 7-day free trial. Monthly and annual plans renew automatically unless canceled at least 24 hours before the end of the current billing period. Manage or cancel your subscription in your Apple ID account settings. Privacy Policy: https://www.getinboxzero.com/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is iOS requirement: Inbox Zero at 18.0 against Fastmask's 26.0. On price, update cadence, ads and in-app purchases 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. Fastmask sells 3 one-off in-app purchases and Inbox Zero sells 2 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.
Fastmask ships an update every 6 days, Inbox Zero weekly. The most recent releases landed on November 5, 2026 and November 9, 2026 respectively.
| Parameter | Fastmask | Inbox Zero |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 days — better | Weekly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Subscription |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 18.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Vitali Quiering | Inbox Zero Inc. |
In-app purchases
Fastmask
- Multi Account$2.99
- Unlimited Aliases$3.99
- Pro Bundle$6.99
Inbox Zero
- Inbox Zero Starter Monthly$19.991 Month
- Inbox Zero Starter Annual$199.991 Year









