# ジョハリの窓テスト vs Interview Prep

The clearest difference is in-app purchases: ジョハリの窓テスト at none against Interview Prep's 2. ジョハリの窓テスト also leads on device support (3 vs 1) and iOS requirement (15.5 vs 18.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Interview Prep sells 2 in-app purchases, starting at $1.99 per 7 days. ジョハリの窓テスト asks for nothing beyond the download.

ジョハリの窓テスト ships an update every 5 days, Interview Prep weekly. The most recent releases landed on October 7, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | ジョハリの窓テスト | Interview Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/interview-prep-selffocus/id6744547323/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 11 MB | 56 MB |
| Requires iOS | **15.5** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ryuichi misaki](https://appshunter.io/developer/1494561865) | [Hideaki Misawa](https://appshunter.io/developer/1626083263) |

## What reviewers say

### ジョハリの窓テスト

[App page](https://appshunter.io/ios/app/id1639346495)

**Features:** macOS Compatibility

**In-app purchases:** none


### Interview Prep

[App page](https://appshunter.io/ios/app/interview-prep-selffocus/id6744547323)

Practice job interviews with AI-powered mock sessions and uncover your strengths. Get personalized feedback and generate a professional profile based on your self-analysis.

**Highlights:** AI-powered mock interviews, Personalized feedback and suggestions, Self-analysis guided by AI coach, Generate professional profile, Adaptive interview questions, Industry and role customization

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan | $1.99 | per 7 days |
| Premium Plan | $8.99 | per month |


## Frequently asked questions

### Is ジョハリの窓テスト free?

ジョハリの窓テスト is free to download, with no in-app purchases.

### Is Interview Prep free?

Interview Prep is free to download, with in-app purchases available.

### Do ジョハリの窓テスト or Interview Prep have ads?

Neither ジョハリの窓テスト nor Interview Prep shows ads.

### Which is updated more often, ジョハリの窓テスト or Interview Prep?

ジョハリの窓テスト ships an update every 5 days, and Interview Prep weekly. Most recently, ジョハリの窓テスト was updated on October 7, 2026 and Interview Prep on October 21, 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.*