# must be one vs KASCADE

The clearest difference is in-app purchases: must be one at none against KASCADE's 1. must be one also leads on iOS requirement (15.6 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. KASCADE sells 1 one-off in-app purchase. must be one asks for nothing beyond the download.

must be one ships an update every 5 weeks, KASCADE monthly. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | must be one | KASCADE |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 weeks | **Monthly** |
| Size | 6 MB | 25 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [office-canard games](https://appshunter.io/developer/6793797221) | [KaribouLab Inc.](https://appshunter.io/developer/1868259457) |

## What reviewers say

### must be one

[App page](https://appshunter.io/ios/app/must-be-one/id6794124997)

**In-app purchases:** none


### KASCADE

[App page](https://appshunter.io/ios/app/kascade-chain-puzzle/id6812043387)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KASCADE Premium | $3.99 | one-time |


## Frequently asked questions

### Is must be one free?

must be one is free to download, with no in-app purchases.

### Is KASCADE free?

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

### Do must be one or KASCADE have ads?

Both must be one and KASCADE show ads.

### Which is updated more often, must be one or KASCADE?

must be one ships an update every 5 weeks, and KASCADE monthly. Most recently, must be one was updated on October 31, 2026 and KASCADE on November 6, 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.*