# Julianator vs LSTclock

The clearest difference is price: LSTclock at Free against Julianator's $0.99. Julianator's advantage is rating (4.7 vs 3.8) and review sentiment (70% vs 55%). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

LSTclock is free to download; Julianator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Julianator holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Julianator has 117 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 70% of Julianator's written reviews are positive against 55% of LSTclock's.

Julianator ships an update every 3 months, LSTclock every 2 months. The most recent releases landed on October 18, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Julianator | LSTclock |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.7 (117 ratings)](https://appshunter.io/ios/app/julianator/id383950353/reviews)** | [3.8 (10 ratings)](https://appshunter.io/ios/app/lstclock-sidereal-time-clock/id1510148631/reviews) |
| Number of ratings | **117** | 10 |
| Positive reviews | **70.4% of reviews** | 54.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Best chart rank | **#173** | — |
| Size | 4 MB | 15 MB |
| Requires iOS | 17.4 | **17.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Bright Day Digital LLC](https://appshunter.io/developer/383950356) | [Tsuyoshi Sawada](https://appshunter.io/developer/1510148630) |

## What reviewers say

### Julianator

[App page](https://appshunter.io/ios/app/julianator/id383950353)

**Currently charting:** #173 Top Paid · Utilities (US App Store)

Easily convert dates between the Gregorian calendar and the Julian Day of Year (ordinal date). This tool is useful for systems that use day-of-year numbering, such as mainframes, military, and food industries. It offers a clean interface, monthly views, and widgets for quick access.

**Highlights:** Gregorian to Julian Day of Year conversion, Julian Day of Year to Gregorian conversion, Monthly calendar view, Home Screen widgets, Lock Screen widgets, Watch app with complications

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

**In-app purchases:** none


### 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 Julianator free?

Julianator costs $0.99, with no in-app purchases.

### Is LSTclock free?

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

### Which has better reviews, Julianator or LSTclock?

Julianator is rated higher. Julianator averages 4.7 out of 5 from 117 ratings, while LSTclock averages 3.8 from 10 ratings.

### Do Julianator or LSTclock have ads?

Neither Julianator nor LSTclock shows ads.

### Which is updated more often, Julianator or LSTclock?

Julianator ships an update every 3 months, and LSTclock every 2 months. Most recently, Julianator was updated on October 18, 2026 and LSTclock on October 12, 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.*