# LSTclock vs iOptron Commander (iOS)

The clearest difference is review sentiment: LSTclock at 55% against iOptron Commander (iOS)'s 6%. LSTclock also leads on rating (3.8 vs 1.9) and update cadence (every 2 months vs every 6 months). On price, ratings volume, 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.

LSTclock holds the better App Store score, 3.8 against 1.9. Both are backed by a comparable volume of ratings — 10 and 14 respectively. Written reviews point the same way: 55% of LSTclock's written reviews are positive against 6% of iOptron Commander (iOS)'s.

LSTclock ships an update every 2 months, iOptron Commander (iOS) every 6 months. The most recent releases landed on October 12, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | LSTclock | iOptron Commander (iOS) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (10 ratings)](https://appshunter.io/ios/app/lstclock-sidereal-time-clock/id1510148631/reviews)** | [1.9 (14 ratings)](https://appshunter.io/ios/app/ioptron-commander-ios/id1626958667/reviews) |
| Number of ratings | 10 | **14** |
| Positive reviews | **54.5% of reviews** | 6.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Free | Free |
| Size | 15 MB | 24 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tsuyoshi Sawada](https://appshunter.io/developer/1510148630) | [成城 徐](https://appshunter.io/developer/564078964) |

## 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


### iOptron Commander (iOS)

[App page](https://appshunter.io/ios/app/ioptron-commander-ios/id1626958667)

Control your iOptron telescope mount remotely using your iOS device. This utility allows for basic functions like slewing to celestial objects, syncing time and location, and managing compatible mount series.

**Highlights:** Remote telescope mount control, Slew to stars and deepsky objects, Sync time and site from iOS, Supports HEM, HAE, HAZ, CEM, GEM series mounts, Basic control functions

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

**In-app purchases:** none


## Frequently asked questions

### Is LSTclock free?

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

### Is iOptron Commander (iOS) free?

iOptron Commander (iOS) is free to download, with no in-app purchases.

### Which has better reviews, LSTclock or iOptron Commander (iOS)?

LSTclock is rated higher. LSTclock averages 3.8 out of 5 from 10 ratings, while iOptron Commander (iOS) averages 1.9 from 14 ratings.

### Do LSTclock or iOptron Commander (iOS) have ads?

Neither LSTclock nor iOptron Commander (iOS) shows ads.

### Which is updated more often, LSTclock or iOptron Commander (iOS)?

LSTclock ships an update every 2 months, and iOptron Commander (iOS) every 6 months. Most recently, LSTclock was updated on October 12, 2026 and iOptron Commander (iOS) on October 2, 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.*