Appio App vs Inbox Zero
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Appio App
This app allows users to access mobile features from services they subscribe to, such as real-time notifications and widgets. Businesses can quickly offer these mobile capabilities without custom app development.
- Real-time notifications
- Service widgets
- No app development required for businesses
- Customer connectivity to services
- Fast mobile feature deployment
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Appio is the fastest way to let services offer mobile features, like notifications and widgets, without building a custom app. If you're a customer of a service that uses Appio, simply connect to access their widgets and receive real-time notifications. If you're a business, visit https://appio.so to start offering mobile features in minutes. No app development required.
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 in-app purchases: Appio App at none against Inbox Zero's 2. On price, update cadence, 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
Both are free to download. Inbox Zero sells 2 in-app purchases, starting at $19.99 per month. Appio App asks for nothing beyond the download.
Appio App ships an update fortnightly, Inbox Zero weekly. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.
| Parameter | Appio App | Inbox Zero |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Fortnightly | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.5 — better | 18.0 |
| Further details — not scored | ||
| Size | 54 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Appio Limited | Inbox Zero Inc. |
In-app purchases
Appio App
No in-app purchases
Inbox Zero
- Inbox Zero Starter Monthly$19.991 Month
- Inbox Zero Starter Annual$199.991 Year









