# Inbox Pro vs SynergyOS

The clearest difference is rating: SynergyOS at 5.0 against Inbox Pro's 4.5. SynergyOS also leads on update cadence (every 5 days vs every 2 months). Inbox Pro's advantage is ratings volume (147 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SynergyOS holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Inbox Pro has 147 ratings behind it against 1, so its average is the more settled of the two.

Inbox Pro ships an update every 2 months, SynergyOS every 5 days. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Inbox Pro | SynergyOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (147 ratings)](https://appshunter.io/ios/app/inbox-pro-email-for-gmail/id6469538263/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/synergyos/id6743176559/reviews)** |
| Number of ratings | **147** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 70 MB | 28 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ChromaticApp Ltd](https://appshunter.io/developer/1709658156) | [Synergy Inc.](https://appshunter.io/developer/1585984272) |

## What reviewers say

### Inbox Pro

[App page](https://appshunter.io/ios/app/inbox-pro-email-for-gmail/id6469538263)

This email client prioritizes your privacy and security for Gmail accounts. It offers robust protection through data-free access, biometric locks, and encrypted communication, ensuring your sensitive information remains safe.

**Highlights:** Data-free email access, Fingerprint/Face ID lock, Encrypted communication, Passcode protection, Seamless Gmail integration, User-friendly interface

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### SynergyOS

[App page](https://appshunter.io/ios/app/synergyos/id6743176559)

Enhance team productivity and collaboration with a unified platform for communication and file management. This secure app enables instant chats and efficient organization, allowing teams to work together seamlessly from any location.

**Highlights:** Instant team chats, Secure file management, Unified platform, Remote work support, Efficient organization

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Inbox Pro free?

Inbox Pro is free to download, with no in-app purchases.

### Is SynergyOS free?

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

### Which has better reviews, Inbox Pro or SynergyOS?

SynergyOS is rated higher. Inbox Pro averages 4.5 out of 5 from 147 ratings, while SynergyOS averages 5.0 from 1 ratings.

### Do Inbox Pro or SynergyOS have ads?

Neither Inbox Pro nor SynergyOS shows ads.

### Which is updated more often, Inbox Pro or SynergyOS?

Inbox Pro ships an update every 2 months, and SynergyOS every 5 days. Most recently, Inbox Pro was updated on November 7, 2026 and SynergyOS on November 4, 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.*