# Axis Space vs Inbox Zero

The clearest difference is in-app purchases: Axis Space at none against Inbox Zero's 2. Inbox Zero's advantage is update cadence (weekly vs every 10 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Inbox Zero sells 2 in-app purchases, starting at $19.99 per month. Axis Space asks for nothing beyond the download.

Axis Space ships an update every 10 months, Inbox Zero weekly. The most recent releases landed on October 12, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Axis Space | Inbox Zero |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Weekly** |
| Monetization | — | Subscription |
| Size | 30 MB | 35 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [AXIS SPACE LLC](https://appshunter.io/developer/1846057460) | [Inbox Zero Inc.](https://appshunter.io/developer/1880462164) |

## What reviewers say

### Axis Space

[App page](https://appshunter.io/ios/app/axis-space/id6753976099)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Inbox Zero

[App page](https://appshunter.io/ios/app/inbox-zero-ai-email-assistant/id6759736561)

This AI-powered assistant helps you manage your email inbox efficiently. It prioritizes important messages, drafts replies in your style, and helps you unsubscribe from unwanted newsletters. Automate email handling with custom rules and stay in control of your communications.

**Highlights:** Prioritize important emails, Draft AI-assisted replies, Unsubscribe from newsletters, Bulk archive emails, Create custom automation rules, Manage multiple Gmail accounts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Inbox Zero Starter Monthly | $19.99 | per month |
| Inbox Zero Starter Annual | $199.99 | per year |


## Frequently asked questions

### Is Axis Space free?

Axis Space is free to download, with no in-app purchases.

### Is Inbox Zero free?

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

### Do Axis Space or Inbox Zero have ads?

Neither Axis Space nor Inbox Zero shows ads.

### Which is updated more often, Axis Space or Inbox Zero?

Axis Space ships an update every 10 months, and Inbox Zero weekly. Most recently, Axis Space was updated on October 12, 2026 and Inbox Zero on October 20, 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.*