# リザーブキーパー CTI vs Fire Equip A4 Exam Prep JP

The clearest difference is ads: リザーブキーパー CTI at none against Fire Equip A4 Exam Prep JP's shown. Fire Equip A4 Exam Prep JP's advantage is update cadence (every 8 days vs every 11 months) and device support (3 vs 1). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

リザーブキーパー CTI ships an update every 11 months, Fire Equip A4 Exam Prep JP every 8 days. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | リザーブキーパー CTI | Fire Equip A4 Exam Prep JP |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Every 8 days** |
| Monetization | — | Ad-supported |
| Size | 5 MB | 18 MB |
| Requires iOS | **15.6** | 16 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [株式会社エアネット](https://appshunter.io/developer/1195517891) | [Ryouhei Azuma](https://appshunter.io/developer/1353297781) |

## What reviewers say

### リザーブキーパー CTI

[App page](https://appshunter.io/ios/app/cti/id1195517892)

**Features:** macOS Compatibility

**In-app purchases:** none


### Fire Equip A4 Exam Prep JP

[App page](https://appshunter.io/ios/app/fire-equip-a4-exam-prep-jp/id6761760019)

Prepare for the Japan Fire Equipment Engineer Class A Type 4 exam with this study app. It offers practice questions and detailed explanations across all six subjects, with various study modes and progress tracking. Study efficiently offline anytime, anywhere.

**Highlights:** Practice questions and explanations, Covers all 6 exam subjects, Random practice and subject study modes, Resume interrupted sessions, Review incorrect answers, Offline study capability, Progress tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is リザーブキーパー CTI free?

リザーブキーパー CTI is free to download, with no in-app purchases.

### Is Fire Equip A4 Exam Prep JP free?

Fire Equip A4 Exam Prep JP is free to download, with no in-app purchases.

### Do リザーブキーパー CTI or Fire Equip A4 Exam Prep JP have ads?

Fire Equip A4 Exam Prep JP shows ads; リザーブキーパー CTI does not.

### Which is updated more often, リザーブキーパー CTI or Fire Equip A4 Exam Prep JP?

リザーブキーパー CTI ships an update every 11 months, and Fire Equip A4 Exam Prep JP every 8 days. Most recently, リザーブキーパー CTI was updated on October 29, 2026 and Fire Equip A4 Exam Prep JP 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.*