# 地下工程计算 vs Dynamic Calendar

The clearest difference is in-app purchases: 地下工程计算 at none against Dynamic Calendar's 1. 地下工程计算 also leads on iOS requirement (15.0 vs 17.0). Dynamic Calendar's advantage is update cadence (every 3 weeks vs every 15 months). On price, ads and device support there is nothing between them.

Both are free to download. Dynamic Calendar sells 1 one-off in-app purchase. 地下工程计算 asks for nothing beyond the download.

地下工程计算 ships an update every 15 months, Dynamic Calendar every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 地下工程计算 | Dynamic Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (6 ratings)](https://appshunter.io/ios/app/dynamic-calendar/id6578435786/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 22.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 33 MB | 49 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [靖奇 崔](https://appshunter.io/developer/1745990262) | [Tianjin Nankai Xuewei Technology Studio (Individually Owned Business)](https://appshunter.io/developer/1516740726) |

## What reviewers say

### 地下工程计算

[App page](https://appshunter.io/ios/app/id6502586182)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dynamic Calendar

[App page](https://appshunter.io/ios/app/dynamic-calendar/id6578435786)

Manage your schedule efficiently with this ad-free tool. View calendars and tasks via desktop widgets, sync with your system calendar, and get reminders for holidays and make-up workdays. Enjoy a smooth user experience for all your scheduling needs.

**Highlights:** Widget calendar view (daily, weekly, monthly), Holiday and make-up workday reminders, System calendar synchronization, Schedule list view, Ad-free experience

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime VIP | $3.99 | one-time |


## Frequently asked questions

### Is 地下工程计算 free?

地下工程计算 is free to download, with no in-app purchases.

### Is Dynamic Calendar free?

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

### Do 地下工程计算 or Dynamic Calendar have ads?

Neither 地下工程计算 nor Dynamic Calendar shows ads.

### Which is updated more often, 地下工程计算 or Dynamic Calendar?

地下工程计算 ships an update every 15 months, and Dynamic Calendar every 3 weeks. Most recently, 地下工程计算 was updated on October 24, 2026 and Dynamic Calendar 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.*