# Spacetime Clock vs SAMURAI ALARM Lite

The clearest difference is update cadence: Spacetime Clock at every 5 weeks against SAMURAI ALARM Lite's every 5 months. SAMURAI ALARM Lite's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 16.0). On price, 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.

Spacetime Clock ships an update every 5 weeks, SAMURAI ALARM Lite every 5 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Spacetime Clock | SAMURAI ALARM Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (4 ratings)](https://appshunter.io/ios/app/spacetime-clock/id404558956/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 40.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 5 months |
| Monetization | Paid | — |
| Size | 6 MB | 65 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [y-design](https://appshunter.io/developer/398188218) | [Transsoft Inc.](https://appshunter.io/developer/893108165) |

## What reviewers say

### Spacetime Clock

[App page](https://appshunter.io/ios/app/spacetime-clock/id404558956)

Explore celestial mechanics and terrestrial positioning with this app. Visualize moon phases, Earth's rotation, and your location's latitude and longitude. It also includes a compass and level meter for your device.

**Highlights:** Moon phases visualization, Earth rotation and revolution simulation, Latitude and longitude display, Compass functionality, iPhone level meter, Customizable background colors

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

**In-app purchases:** none


### SAMURAI ALARM Lite

[App page](https://appshunter.io/ios/app/samurai-alarm-lite/id893108162)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Spacetime Clock free?

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

### Is SAMURAI ALARM Lite free?

SAMURAI ALARM Lite is free to download, with no in-app purchases.

### Do Spacetime Clock or SAMURAI ALARM Lite have ads?

Neither Spacetime Clock nor SAMURAI ALARM Lite shows ads.

### Which is updated more often, Spacetime Clock or SAMURAI ALARM Lite?

Spacetime Clock ships an update every 5 weeks, and SAMURAI ALARM Lite every 5 months. Most recently, Spacetime Clock was updated on November 1, 2026 and SAMURAI ALARM Lite on November 6, 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.*