# LSTclock vs Appgate RBA Authenticator

The clearest difference is update cadence: LSTclock at every 2 months against Appgate RBA Authenticator's every 14 months. Appgate RBA Authenticator's advantage is iOS requirement (11.0 vs 17.0). 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.

LSTclock ships an update every 2 months, Appgate RBA Authenticator every 14 months. The most recent releases landed on September 9, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | LSTclock | Appgate RBA Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (10 ratings)](https://appshunter.io/ios/app/lstclock-sidereal-time-clock/id1510148631/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 14 months |
| Monetization | Free | — |
| Size | 15 MB | 16 MB |
| Requires iOS | 17.0 | **11.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tsuyoshi Sawada](https://appshunter.io/developer/1510148630) | [Appgate Cybersecurity, Inc](https://appshunter.io/developer/1632318126) |

## What reviewers say

### LSTclock

[App page](https://appshunter.io/ios/app/lstclock-sidereal-time-clock/id1510148631)

This utility app displays local sidereal time for registered locations on iOS, iPadOS, and watchOS. It can also calculate sidereal time and Julian Date for any date and time, and sync locations between devices.

**Highlights:** Local sidereal time display, Julian Date calculation, Supports multiple registered locations, Location sync between iPhone and Apple Watch, Date and time specific calculations

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

**In-app purchases:** none


### Appgate RBA Authenticator

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

**In-app purchases:** none


## Frequently asked questions

### Is LSTclock free?

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

### Is Appgate RBA Authenticator free?

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

### Do LSTclock or Appgate RBA Authenticator have ads?

Neither LSTclock nor Appgate RBA Authenticator shows ads.

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

LSTclock ships an update every 2 months, and Appgate RBA Authenticator every 14 months. Most recently, LSTclock was updated on September 9, 2026 and Appgate RBA Authenticator on September 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*