# Earth Clock Calendar vs Contractor Estimate Maker

The clearest difference is update cadence: Contractor Estimate Maker at weekly against Earth Clock Calendar's every 3 weeks. Contractor Estimate Maker also leads on iOS requirement (13.0 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Earth Clock Calendar sells 1 one-off in-app purchase and Contractor Estimate Maker sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Earth Clock Calendar ships an update every 3 weeks, Contractor Estimate Maker weekly. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Earth Clock Calendar | Contractor Estimate Maker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (10 ratings)](https://appshunter.io/ios/app/earth-clock-calendar/id1623275786/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 30 MB | 44 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Earth at the Center LLC](https://appshunter.io/developer/1437026436) | [Qun Cao](https://appshunter.io/developer/1655069600) |

## What reviewers say

### Earth Clock Calendar

[App page](https://appshunter.io/ios/app/earth-clock-calendar/id1623275786)

This app visualizes time and date based on celestial movements. It displays the Earth, Moon, and Sun's positions, offering a unique perspective on timekeeping and natural rhythms. Users can explore various cultural calendars and understand their relationship to natural cycles.

**Highlights:** Earth, Moon, and Sun visualization, Planetary time and date display, Automatic time zone and location adjustment, Moon phase tracking, Zodiac sign integration for months, Sunrise and sunset times, Multiple cultural calendar options

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chinese Calendar | $0.99 | one-time |


### Contractor Estimate Maker

[App page](https://appshunter.io/ios/app/contractor-estimate-maker/id6776654772)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Contractor Pro Monthly | $9.99 | per month |
| Contractor Pro Yearly | $59.99 | per year |
| Contractor Pro Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Earth Clock Calendar free?

Earth Clock Calendar is free to download, with in-app purchases available.

### Is Contractor Estimate Maker free?

Contractor Estimate Maker is free to download, with in-app purchases available.

### Do Earth Clock Calendar or Contractor Estimate Maker have ads?

Neither Earth Clock Calendar nor Contractor Estimate Maker shows ads.

### Which is updated more often, Earth Clock Calendar or Contractor Estimate Maker?

Earth Clock Calendar ships an update every 3 weeks, and Contractor Estimate Maker weekly. Most recently, Earth Clock Calendar was updated on October 30, 2026 and Contractor Estimate Maker on October 25, 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.*