# Local Sidereal Time vs LSTclock

The clearest difference is rating: Local Sidereal Time at 4.7 against LSTclock's 3.8. Local Sidereal Time also leads on ratings volume (1.1K vs 10) and review sentiment (71% vs 55%). LSTclock's advantage is in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Local Sidereal Time sells 1 one-off in-app purchase. LSTclock asks for nothing beyond the download.

Local Sidereal Time holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Local Sidereal Time has 1.1K ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 71% of Local Sidereal Time's written reviews are positive against 55% of LSTclock's.

Local Sidereal Time ships an update every 4 months, LSTclock every 2 months. The most recent releases landed on September 21, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Local Sidereal Time | LSTclock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.1K ratings)](https://appshunter.io/ios/app/local-sidereal-time/id1256725300/reviews)** | [3.8 (10 ratings)](https://appshunter.io/ios/app/lstclock-sidereal-time-clock/id1510148631/reviews) |
| Number of ratings | **1.1K** | 10 |
| Positive reviews | **70.7% of reviews** | 54.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 20 MB | 15 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Scott Spiller](https://appshunter.io/developer/1256725299) | [Tsuyoshi Sawada](https://appshunter.io/developer/1510148630) |

## What reviewers say

### Local Sidereal Time

[App page](https://appshunter.io/ios/app/local-sidereal-time/id1256725300)

This app calculates local sidereal time, a system astronomers use to locate celestial objects. It can also be used for personal development, with studies suggesting increased psychic abilities during specific sidereal times. The pro version offers advanced features like notifications and map-based calculations.

**Highlights:** Calculate local sidereal time, Astronomy celestial object location, Potential psychic ability enhancement, Pro version notifications, Pro version map-based calculation, Pro version date/time conversion

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Useful app
- 💡 Helpful notifications
- 👍 Great customer service
- 💡 Excellent tool

**What reviewers complain about**

- 🐛 Alarm doesn't work
- 🐛 Crashes frequently
- 🔒 Pro purchase issues
- 🐛 Notification issues

**Reported bugs**

- Alarm doesn't work
- Crashes when loading
- Notification issues
- Pro purchase restoration not working

**Requested features**

- Add alarm feature
- Allow setting location manually
- Improve notification handling
- Automatically adjust for daylight saving time


### 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


## Frequently asked questions

### Is Local Sidereal Time free?

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

### Is LSTclock free?

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

### Which has better reviews, Local Sidereal Time or LSTclock?

Local Sidereal Time is rated higher. Local Sidereal Time averages 4.7 out of 5 from 1.1K ratings, while LSTclock averages 3.8 from 10 ratings.

### Do Local Sidereal Time or LSTclock have ads?

Neither Local Sidereal Time nor LSTclock shows ads.

### Which is updated more often, Local Sidereal Time or LSTclock?

Local Sidereal Time ships an update every 4 months, and LSTclock every 2 months. Most recently, Local Sidereal Time was updated on September 21, 2026 and LSTclock on September 9, 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.*