# ChatInbox vs 1Stack Stellar

The clearest difference is in-app purchases: 1Stack Stellar at none against ChatInbox's 3. 1Stack Stellar also leads on iOS requirement (13.0 vs 17.0). ChatInbox's advantage is update cadence (every 5 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. ChatInbox sells 3 in-app purchases, starting at $4.99 per month. 1Stack Stellar asks for nothing beyond the download.

ChatInbox ships an update every 5 days, 1Stack Stellar every 2 months. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ChatInbox | 1Stack Stellar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (29 ratings)](https://appshunter.io/ios/app/chatinbox-email-by-sender/id6462772788/reviews)** | — |
| Number of ratings | **29** | — |
| Positive reviews | 61.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 45 MB | 55 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Innovatism LLC](https://appshunter.io/developer/955315491) | [CoreTech s.r.l.](https://appshunter.io/developer/1146811110) |

## What reviewers say

### ChatInbox

[App page](https://appshunter.io/ios/app/chatinbox-email-by-sender/id6462772788)

This app reimagines your email by organizing it around people, not dates. View all conversations with a contact in a chat-style format, making it easy to find past messages and attachments. It supports multiple email accounts and devices, offering a streamlined inbox experience.

**Highlights:** Contact-centered inbox, All accounts in one inbox, Smart contact grouping, Attachments by person, Calendar view, Email reminders

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $29.99 | per year |
| Lifetime Premium | $59.99 | one-time |


### 1Stack Stellar

[App page](https://appshunter.io/ios/app/1stack-stellar/id6760779216)

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

**In-app purchases:** none


## Frequently asked questions

### Is ChatInbox free?

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

### Is 1Stack Stellar free?

1Stack Stellar is free to download, with no in-app purchases.

### Do ChatInbox or 1Stack Stellar have ads?

Neither ChatInbox nor 1Stack Stellar shows ads.

### Which is updated more often, ChatInbox or 1Stack Stellar?

ChatInbox ships an update every 5 days, and 1Stack Stellar every 2 months. Most recently, ChatInbox was updated on October 4, 2026 and 1Stack Stellar on October 10, 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.*