# Mailbox vs PosBack Servis

The clearest difference is iOS requirement: Mailbox at 13.0 against PosBack Servis's 15.5. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Mailbox ships an update every 2 weeks, PosBack Servis fortnightly. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Mailbox | PosBack Servis |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Size | 25 MB | 25 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MAILBOX INTERNET HIZMETLERI LIMITED SIRKETI](https://appshunter.io/developer/1851695082) | [FARK BILGI ISLEM BILGISAYAR EGITIM VE ELEKTRONIK SISTEMLERI TICARET LIMITED SIRKETI](https://appshunter.io/developer/1794273856) |

## What reviewers say

### Mailbox

[App page](https://appshunter.io/ios/app/mailbox/id6755064788)

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

**In-app purchases:** none


### PosBack Servis

[App page](https://appshunter.io/ios/app/posback-servis/id6792758832)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mailbox free?

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

### Is PosBack Servis free?

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

### Do Mailbox or PosBack Servis have ads?

Neither Mailbox nor PosBack Servis shows ads.

### Which is updated more often, Mailbox or PosBack Servis?

Mailbox ships an update every 2 weeks, and PosBack Servis fortnightly. Most recently, Mailbox was updated on October 28, 2026 and PosBack Servis on October 29, 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.*