# 实用结构静力计算 vs Reverse 专注沙漏

The clearest difference is price: Reverse 专注沙漏 at Free against 实用结构静力计算's $12.99. Reverse 专注沙漏 also leads on review sentiment (100% vs 56%) and update cadence (every 5 weeks vs every 6 months). 实用结构静力计算's advantage is iOS requirement (12.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

Reverse 专注沙漏 is free to download; 实用结构静力计算 costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

实用结构静力计算 ships an update every 6 months, Reverse 专注沙漏 every 5 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 实用结构静力计算 | Reverse 专注沙漏 |
| --- | --- | --- |
| Price | $12.99 | **Free** |
| Rating | — | **[5.0 (7 ratings)](https://appshunter.io/ios/app/reverse/id1564024239/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | 55.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 weeks** |
| Monetization | — | Free |
| Size | 64 MB | 22 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [疆 边](https://appshunter.io/developer/1124320934) | [囝 刘](https://appshunter.io/developer/1564020930) |

## What reviewers say

### 实用结构静力计算

[App page](https://appshunter.io/ios/app/id1185307976)

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

**In-app purchases:** none


### Reverse 专注沙漏

[App page](https://appshunter.io/ios/app/reverse/id1564024239)

This app uses your phone's orientation to simulate a real hourglass, visually representing the passage of time. It's designed to help users focus on tasks by making time tangible and observable.

**Highlights:** Real hourglass simulation, Visual time tracking, Focus enhancement, Phone orientation control

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 实用结构静力计算 free?

实用结构静力计算 costs $12.99, with no in-app purchases.

### Is Reverse 专注沙漏 free?

Reverse 专注沙漏 is free to download, with no in-app purchases.

### Do 实用结构静力计算 or Reverse 专注沙漏 have ads?

Neither 实用结构静力计算 nor Reverse 专注沙漏 shows ads.

### Which is updated more often, 实用结构静力计算 or Reverse 专注沙漏?

实用结构静力计算 ships an update every 6 months, and Reverse 专注沙漏 every 5 weeks. Most recently, 实用结构静力计算 was updated on November 2, 2026 and Reverse 专注沙漏 on November 3, 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.*