# ２級土木施工管理技術検定 (土木)「30日合格プログラム」 vs Heron's Formula Calculator

The clearest difference is price: Heron's Formula Calculator at $2.99 against ２級土木施工管理技術検定 (土木)「30日合格プログラム」's $9.99. ２級土木施工管理技術検定 (土木)「30日合格プログラム」's advantage is iOS requirement (11.0 vs 16.0). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

２級土木施工管理技術検定 (土木)「30日合格プログラム」 costs $9.99 and Heron's Formula Calculator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

２級土木施工管理技術検定 (土木)「30日合格プログラム」 ships an update every 10 months, Heron's Formula Calculator every 12 months. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | ２級土木施工管理技術検定 (土木)「30日合格プログラム」 | Heron's Formula Calculator |
| --- | --- | --- |
| Price | $9.99 | **$2.99** |
| Positive reviews | 81.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 12 months |
| Monetization | Paid | Paid |
| Size | 32 MB | 3 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ReCorrect Inc.](https://appshunter.io/developer/1141646408) | [kotobaz](https://appshunter.io/developer/1634727152) |

## What reviewers say

### ２級土木施工管理技術検定 (土木)「30日合格プログラム」

[App page](https://appshunter.io/ios/app/30/id1436485174)

This app helps users prepare for the Level 2 Civil Engineering Construction Management Technician exam. It analyzes past questions to minimize study time and offers mock tests with randomized questions to accurately assess skill levels. Users can focus on weak subjects with a dedicated stock function for difficult problems.

**Highlights:** Past question analysis, Randomized mock tests, Weak subject focus, Problem stocking, Study plan integration

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

**In-app purchases:** none


### Heron's Formula Calculator

[App page](https://appshunter.io/ios/app/herons-formula-calculator/id1634727150)

Calculate the area of any triangle using only the lengths of its three sides. Simply input the side lengths and get an instant result.

**Highlights:** Calculate triangle area, Input three side lengths, Instant calculation results, Simple user interface

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

**In-app purchases:** none


## Frequently asked questions

### Is ２級土木施工管理技術検定 (土木)「30日合格プログラム」 free?

２級土木施工管理技術検定 (土木)「30日合格プログラム」 costs $9.99, with no in-app purchases.

### Is Heron's Formula Calculator free?

Heron's Formula Calculator costs $2.99, with no in-app purchases.

### Do ２級土木施工管理技術検定 (土木)「30日合格プログラム」 or Heron's Formula Calculator have ads?

Neither ２級土木施工管理技術検定 (土木)「30日合格プログラム」 nor Heron's Formula Calculator shows ads.

### Which is updated more often, ２級土木施工管理技術検定 (土木)「30日合格プログラム」 or Heron's Formula Calculator?

２級土木施工管理技術検定 (土木)「30日合格プログラム」 ships an update every 10 months, and Heron's Formula Calculator every 12 months. Most recently, ２級土木施工管理技術検定 (土木)「30日合格プログラム」 was updated on September 21, 2026 and Heron's Formula Calculator on September 23, 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.*