# いきものログ vs 技術士 一次試験（環境部門）

The clearest difference is in-app purchases: いきものログ at none against 技術士 一次試験（環境部門）'s 1. いきものログ also leads on iOS requirement (14.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 技術士 一次試験（環境部門） sells 1 one-off in-app purchase. いきものログ asks for nothing beyond the download.

いきものログ ships an update every 9 months, 技術士 一次試験（環境部門） every 10 months. The most recent releases landed on October 10, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | いきものログ | 技術士 一次試験（環境部門） |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 6.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 10 months |
| Size | 6 MB | 5 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Biodiversity Center of Japan](https://appshunter.io/developer/845136541) | [TAKAYUKI OOTA](https://appshunter.io/developer/1855196437) |

## What reviewers say

### いきものログ

[App page](https://appshunter.io/ios/app/id845136538)

**Features:** macOS Compatibility

**In-app purchases:** none


### 技術士 一次試験（環境部門）

[App page](https://appshunter.io/ios/app/id6757453059)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 技術士（環境部門） 試験対策 | $4.99 | one-time |


## Frequently asked questions

### Is いきものログ free?

いきものログ is free to download, with no in-app purchases.

### Is 技術士 一次試験（環境部門） free?

技術士 一次試験（環境部門） is free to download, with in-app purchases available.

### Do いきものログ or 技術士 一次試験（環境部門） have ads?

Neither いきものログ nor 技術士 一次試験（環境部門） shows ads.

### Which is updated more often, いきものログ or 技術士 一次試験（環境部門）?

いきものログ ships an update every 9 months, and 技術士 一次試験（環境部門） every 10 months. Most recently, いきものログ was updated on October 10, 2026 and 技術士 一次試験（環境部門） on October 28, 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.*