# Sleep Clock vs Apphemeride Precise Astronomy

The clearest difference is review sentiment: Apphemeride Precise Astronomy at 100% against Sleep Clock's 0%. Apphemeride Precise Astronomy also leads on ads (none vs shown). Sleep Clock's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 26.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Apphemeride Precise Astronomy sells 2 one-off in-app purchases. Sleep Clock asks for nothing beyond the download.

Sleep Clock ships an update every 2 weeks, Apphemeride Precise Astronomy every 4 weeks. The most recent releases landed on October 3, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Sleep Clock | Apphemeride Precise Astronomy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/sleep-clock/id700862374/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 4 weeks |
| Monetization | Ad-supported | **Free** |
| Size | 15 MB | 442 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chris Guyler](https://appshunter.io/developer/687318530) | [Csaba Lengyel](https://appshunter.io/developer/1888397396) |

## What reviewers say

### Sleep Clock

[App page](https://appshunter.io/ios/app/sleep-clock/id700862374)

This app provides a simple bedside clock with visually appealing animated backgrounds. It's designed to be a functional and attractive addition to your nightstand or office desk.

**Highlights:** Animated backgrounds, Bedside clock functionality, Desk clock functionality, Simple interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Apphemeride Precise Astronomy

[App page](https://appshunter.io/ios/app/apphemeride-precise-astronomy/id6776641899)

This app provides precise astronomical data for sky analysis, including eclipses, Moon motion, and planetary positions. It offers location-based calculations and visual tools to understand celestial events and their visibility.

**Highlights:** Precise sky analysis, Eclipse and Moon motion tracking, Location-based celestial calculations, Horizon Tracker for celestial body movement, Detailed planetary and solar system data, Solar and lunar eclipse simulations, Configurable data display

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3-day Trial | Free | one-time |
| Apphemeride Full Unlock | $49.99 | one-time |


## Frequently asked questions

### Is Sleep Clock free?

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

### Is Apphemeride Precise Astronomy free?

Apphemeride Precise Astronomy is free to download, with in-app purchases available.

### Do Sleep Clock or Apphemeride Precise Astronomy have ads?

Sleep Clock shows ads; Apphemeride Precise Astronomy does not.

### Which is updated more often, Sleep Clock or Apphemeride Precise Astronomy?

Sleep Clock ships an update every 2 weeks, and Apphemeride Precise Astronomy every 4 weeks. Most recently, Sleep Clock was updated on October 3, 2026 and Apphemeride Precise Astronomy on September 30, 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.*