# LSTclock vs nGeneTime

The clearest difference is update cadence: nGeneTime at every 10 days against LSTclock's every 2 months. LSTclock's advantage is iOS requirement (17.0 vs 26.0). 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, nGeneTime every 10 days. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | LSTclock | nGeneTime |
| --- | --- | --- |
| 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 10 days** |
| Monetization | Free | — |
| Size | 15 MB | 23 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Tsuyoshi Sawada](https://appshunter.io/developer/1510148630) | [Hyunsuk Roh](https://appshunter.io/developer/1723711954) |

## 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


### nGeneTime

[App page](https://appshunter.io/ios/app/ngenetime/id6763404984)

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

**In-app purchases:** none


## Frequently asked questions

### Is LSTclock free?

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

### Is nGeneTime free?

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

### Do LSTclock or nGeneTime have ads?

Neither LSTclock nor nGeneTime shows ads.

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

LSTclock ships an update every 2 months, and nGeneTime every 10 days. Most recently, LSTclock was updated on October 12, 2026 and nGeneTime on October 15, 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.*