# Appgate RBA Authenticator vs Zulu Time

The clearest difference is in-app purchases: Appgate RBA Authenticator at none against Zulu Time's 1. Appgate RBA Authenticator also leads on iOS requirement (11.0 vs 17.0). Zulu Time's advantage is update cadence (every 4 days vs every 14 months). On price, ads and device support there is nothing between them.

Both are free to download. Zulu Time sells 1 in-app purchase, starting at $1.99 per month. Appgate RBA Authenticator asks for nothing beyond the download.

Appgate RBA Authenticator ships an update every 14 months, Zulu Time every 4 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Appgate RBA Authenticator | Zulu Time |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 4 days** |
| Size | 16 MB | 15 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Appgate Cybersecurity, Inc.](https://appshunter.io/developer/1632318126) | [Yigit Can Akinci](https://appshunter.io/developer/1455217918) |

## What reviewers say

### Appgate RBA Authenticator

[App page](https://appshunter.io/ios/app/appgate-rba-authenticator/id1639435739)

**In-app purchases:** none


### Zulu Time

[App page](https://appshunter.io/ios/app/zulu-time-pilot-utc-clock/id6806399579)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zulu Time Pro | $1.99 | per month |


## Frequently asked questions

### Is Appgate RBA Authenticator free?

Appgate RBA Authenticator is free to download, with no in-app purchases.

### Is Zulu Time free?

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

### Do Appgate RBA Authenticator or Zulu Time have ads?

Neither Appgate RBA Authenticator nor Zulu Time shows ads.

### Which is updated more often, Appgate RBA Authenticator or Zulu Time?

Appgate RBA Authenticator ships an update every 14 months, and Zulu Time every 4 days. Most recently, Appgate RBA Authenticator was updated on November 7, 2026 and Zulu Time on October 31, 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.*