# BLUEMAX ESP vs SGA ZTA Authenticator

The clearest difference is update cadence: BLUEMAX ESP at every 3 months against SGA ZTA Authenticator's every 6 months. SGA ZTA Authenticator's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

BLUEMAX ESP ships an update every 3 months, SGA ZTA Authenticator every 6 months. The most recent releases landed on October 27, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | BLUEMAX ESP | SGA ZTA Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Size | 29 MB | 7 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SECUi Corp.](https://appshunter.io/developer/1607440583) | [SGA Solutions CO.,ltd](https://appshunter.io/developer/1687912593) |

## What reviewers say

### BLUEMAX ESP

[App page](https://appshunter.io/ios/app/bluemax-esp/id6473090718)

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

**In-app purchases:** none


### SGA ZTA Authenticator

[App page](https://appshunter.io/ios/app/sga-zta-authenticator/id6479223847)

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

**In-app purchases:** none


## Frequently asked questions

### Is BLUEMAX ESP free?

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

### Is SGA ZTA Authenticator free?

SGA ZTA Authenticator is free to download, with no in-app purchases.

### Do BLUEMAX ESP or SGA ZTA Authenticator have ads?

Neither BLUEMAX ESP nor SGA ZTA Authenticator shows ads.

### Which is updated more often, BLUEMAX ESP or SGA ZTA Authenticator?

BLUEMAX ESP ships an update every 3 months, and SGA ZTA Authenticator every 6 months. Most recently, BLUEMAX ESP was updated on October 27, 2026 and SGA ZTA Authenticator on October 12, 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.*