# StelaClock vs US Calendar

The clearest difference is price: US Calendar at Free against StelaClock's $3.99. US Calendar also leads on update cadence (every 2 weeks vs every 29 months) and iOS requirement (15.0 vs 26.0). StelaClock's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

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

StelaClock ships an update every 29 months, US Calendar every 2 weeks. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | StelaClock | US Calendar |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/stelaclock/id528908559/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 29 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 7 MB | 24 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gary Saggu](https://appshunter.io/developer/465733546) | [Poornima Arachchige](https://appshunter.io/developer/6789403973) |

## 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


### US Calendar

[App page](https://appshunter.io/ios/app/us-calendar/id6789895511)

**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 US Calendar free?

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

### Do StelaClock or US Calendar have ads?

US Calendar shows ads; StelaClock does not.

### Which is updated more often, StelaClock or US Calendar?

StelaClock ships an update every 29 months, and US Calendar every 2 weeks. Most recently, StelaClock was updated on October 10, 2026 and US Calendar on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*