# THE 13th Digit vs CaseX（ケースエックス）| スマホの中の事件

The clearest difference is ads: THE 13th Digit at none against CaseX（ケースエックス）| スマホの中の事件's shown. THE 13th Digit also leads on iOS requirement (14.0 vs 18.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. THE 13th Digit sells 1 one-off in-app purchase and CaseX（ケースエックス）| スマホの中の事件 sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

THE 13th Digit ships an update every 3 days, CaseX（ケースエックス）| スマホの中の事件 every 6 days. The most recent releases landed on September 30, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | THE 13th Digit | CaseX（ケースエックス）| スマホの中の事件 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 6 days |
| Monetization | — | Free with in-app purchases |
| Size | 190 MB | 42 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [UESHO K.K.](https://appshunter.io/developer/6776764835) | [rio nagasaki](https://appshunter.io/developer/1594001733) |

## What reviewers say

### THE 13th Digit

[App page](https://appshunter.io/ios/app/the-13th-digit/id6787610293)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 2周目〈NG+〉解放 | $1.99 | one-time |


### CaseX（ケースエックス）| スマホの中の事件

[App page](https://appshunter.io/ios/app/casex/id6809037928)

Investigate fictional smartphones to uncover hidden truths and solve compelling mysteries. Piece together fragmented digital evidence from various apps to reveal the complete story behind each case. This narrative-driven game offers bite-sized investigations perfect for quick play sessions.

**Highlights:** Examine fictional smartphone data, Solve narrative-driven mysteries, Multiple fictional app simulations, Hint system for assistance, Unlock new cases via invites, Notifications and Live Activities

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro 週額 | $1.99 | per 7 days |
| Pro 月額 | $2.99 | per month |
| Pro 年額 | $19.99 | per year |


## Frequently asked questions

### Is THE 13th Digit free?

THE 13th Digit is free to download, with in-app purchases available.

### Is CaseX（ケースエックス）| スマホの中の事件 free?

CaseX（ケースエックス）| スマホの中の事件 is free to download, with in-app purchases available.

### Do THE 13th Digit or CaseX（ケースエックス）| スマホの中の事件 have ads?

CaseX（ケースエックス）| スマホの中の事件 shows ads; THE 13th Digit does not.

### Which is updated more often, THE 13th Digit or CaseX（ケースエックス）| スマホの中の事件?

THE 13th Digit ships an update every 3 days, and CaseX（ケースエックス）| スマホの中の事件 every 6 days. Most recently, THE 13th Digit was updated on September 30, 2026 and CaseX（ケースエックス）| スマホの中の事件 on October 11, 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.*