# 1級土木施工管理技術検定 「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 1級土木施工管理技術検定 「30日合格プログラム」's $9.99. On update cadence, ads, in-app purchases and monetization model there is nothing between them.

1級土木施工管理技術検定 「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.

1級土木施工管理技術検定 「30日合格プログラム」 ships an update every 13 months, Heron's Formula Calculator every 12 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | 1級土木施工管理技術検定 「30日合格プログラム」 | Heron's Formula Calculator |
| --- | --- | --- |
| Price | $9.99 | **$2.99** |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 12 months** |
| Monetization | Paid | Paid |
| Size | 23 MB | 3 MB |
| Requires iOS | **15.0** | 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

### 1級土木施工管理技術検定 「30日合格プログラム」

[App page](https://appshunter.io/ios/app/1-30/id1608905304)

This application provides a comprehensive study program for the Grade 1 Civil Engineering Construction Management Engineer exam. It features a randomized mock exam, targeted practice for weak subjects, and example answers for the practical exam, aiming to help users pass with minimal study time.

**Highlights:** Randomized mock exams, Targeted practice for weak subjects, Example answers for practical exam, Efficient study schedule, Past exam analysis

**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 1級土木施工管理技術検定 「30日合格プログラム」 free?

1級土木施工管理技術検定 「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 1級土木施工管理技術検定 「30日合格プログラム」 or Heron's Formula Calculator have ads?

Neither 1級土木施工管理技術検定 「30日合格プログラム」 nor Heron's Formula Calculator shows ads.

### Which is updated more often, 1級土木施工管理技術検定 「30日合格プログラム」 or Heron's Formula Calculator?

1級土木施工管理技術検定 「30日合格プログラム」 ships an update every 13 months, and Heron's Formula Calculator every 12 months. Most recently, 1級土木施工管理技術検定 「30日合格プログラム」 was updated on November 3, 2026 and Heron's Formula Calculator 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.*