# Case Zero vs ONE KILLER LEFT

The clearest difference is ads: Case Zero at none against ONE KILLER LEFT's shown. ONE KILLER LEFT's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price and in-app purchases there is nothing between them.

Both are free to download. Case Zero sells 1 one-off in-app purchase and ONE KILLER LEFT sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Case Zero | ONE KILLER LEFT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 4 days |
| Size | 1 MB | 41 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Min Seon Kim](https://appshunter.io/developer/1896737393) | [RICARDO GONZALEZ ESCALERA](https://appshunter.io/developer/6804354567) |

## What reviewers say

### Case Zero

[App page](https://appshunter.io/ios/app/case-zero-daily-mystery/id6770371428)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Detective Pass | $4.99 | one-time |


### ONE KILLER LEFT

[App page](https://appshunter.io/ios/app/one-killer-left/id6804354565)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 5 Discards | $0.99 | one-time |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Case Zero free?

Case Zero is free to download, with in-app purchases available.

### Is ONE KILLER LEFT free?

ONE KILLER LEFT is free to download, with in-app purchases available.

### Do Case Zero or ONE KILLER LEFT have ads?

ONE KILLER LEFT shows ads; Case Zero does not.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*