# LSTclock vs Binary Clock by jhale.dev

The clearest difference is review sentiment: Binary Clock by jhale.dev at 100% against LSTclock's 55%. Binary Clock by jhale.dev also leads on rating (4.5 vs 3.8) and iOS requirement (15.1 vs 17.0). LSTclock's advantage is ratings volume (10 vs 2). On price, update cadence, 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.

Binary Clock by jhale.dev holds the better App Store score, 4.5 against 3.8. That said, the two scores are not equally well evidenced: LSTclock has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 55% of LSTclock's written reviews are positive against 100% of Binary Clock by jhale.dev's.

LSTclock ships an update every 2 months, Binary Clock by jhale.dev every 4 months. The most recent releases landed on September 9, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | LSTclock | Binary Clock by jhale.dev |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (10 ratings)](https://appshunter.io/ios/app/lstclock-sidereal-time-clock/id1510148631/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/binary-clock-by-jhaledev/id6448813967/reviews)** |
| Number of ratings | **10** | 2 |
| Positive reviews | 54.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 15 MB | 12 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tsuyoshi Sawada](https://appshunter.io/developer/1510148630) | [Joseph Hale](https://appshunter.io/developer/1686507309) |

## 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


### Binary Clock by jhale.dev

[App page](https://appshunter.io/ios/app/binary-clock-by-jhaledev/id6448813967)

This utility displays time using binary code, representing numbers with illuminated dots. It offers personalization options and includes instructions for reading the binary time format. The application is open-source.

**Highlights:** Binary time display, Customizable settings, Instructions for binary time, Open-source code, Personalization options

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LSTclock free?

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

### Is Binary Clock by jhale.dev free?

Binary Clock by jhale.dev is free to download, with no in-app purchases.

### Which has better reviews, LSTclock or Binary Clock by jhale.dev?

Binary Clock by jhale.dev is rated higher. LSTclock averages 3.8 out of 5 from 10 ratings, while Binary Clock by jhale.dev averages 4.5 from 2 ratings.

### Do LSTclock or Binary Clock by jhale.dev have ads?

Neither LSTclock nor Binary Clock by jhale.dev shows ads.

### Which is updated more often, LSTclock or Binary Clock by jhale.dev?

LSTclock ships an update every 2 months, and Binary Clock by jhale.dev every 4 months. Most recently, LSTclock was updated on September 9, 2026 and Binary Clock by jhale.dev on June 4, 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.*