# StelaClock vs SkyAtlas

The clearest difference is review sentiment: StelaClock at 86% against SkyAtlas's 40%. StelaClock also leads on rating (4.7 vs 2.4). SkyAtlas's advantage is price (Free vs $3.99) and update cadence (monthly vs every 29 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

SkyAtlas is free to download; StelaClock costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

StelaClock holds the better App Store score, 4.7 against 2.4. Both are backed by a comparable volume of ratings — 6 and 17 respectively. Written reviews point the same way: 86% of StelaClock's written reviews are positive against 40% of SkyAtlas's.

StelaClock ships an update every 29 months, SkyAtlas monthly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | StelaClock | SkyAtlas |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.7 (6 ratings)](https://appshunter.io/ios/app/stelaclock/id528908559/reviews)** | [2.4 (17 ratings)](https://appshunter.io/ios/app/skyatlas/id1616449238/reviews) |
| Number of ratings | 6 | **17** |
| Positive reviews | **85.7% of reviews** | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 7 MB | 911 MB |
| Requires iOS | 26.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gary Saggu](https://appshunter.io/developer/465733546) | [SuZhou ZWO Co., Ltd](https://appshunter.io/developer/1367782033) |

## What reviewers say

### StelaClock

[App page](https://appshunter.io/ios/app/stelaclock/id528908559)

Discover the Mayan calendar and number system with this educational clock app. It displays the current time and date using Mayan glyphs and a Base 20 notation, offering a unique way to experience ancient Maya culture.

**Highlights:** Mayan calendar display, Mayan number system, Vigesimal (Base 20) notation, Sophisticated calendar converter, Mayan glyph numerals, Daily use clock

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

**In-app purchases:** none


### SkyAtlas

[App page](https://appshunter.io/ios/app/skyatlas/id1616449238)

Explore the night sky with a digital atlas and control your telescope mount. Plan astrophotography compositions with simulated camera fields of view and track celestial objects in real-time. Features one-click GoTo and mode switching for an enhanced stargazing experience.

**Highlights:** Digital sky atlas exploration, Telescope mount control (ZWO ASI), Simulated camera field of view, Real-time telescope pointing display, One-click GoTo functionality, Object tracking, EQ and AltAz mode switching

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

**In-app purchases:** none


## Frequently asked questions

### Is StelaClock free?

StelaClock costs $3.99, with no in-app purchases.

### Is SkyAtlas free?

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

### Which has better reviews, StelaClock or SkyAtlas?

StelaClock is rated higher. StelaClock averages 4.7 out of 5 from 6 ratings, while SkyAtlas averages 2.4 from 17 ratings.

### Do StelaClock or SkyAtlas have ads?

Neither StelaClock nor SkyAtlas shows ads.

### Which is updated more often, StelaClock or SkyAtlas?

StelaClock ships an update every 29 months, and SkyAtlas monthly. Most recently, StelaClock was updated on October 23, 2026 and SkyAtlas on October 24, 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.*