# DUO vs Guess Size

The clearest difference is update cadence: DUO at daily against Guess Size's every 3 days. DUO also leads on iOS requirement (15.1 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

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

DUO ships an update daily, Guess Size every 3 days. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | DUO | Guess Size |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 days |
| Size | 39 MB | 2 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Christophe Boshra](https://appshunter.io/developer/1821313509) | [Remi Cassan](https://appshunter.io/developer/1813775798) |

## What reviewers say

### DUO

[App page](https://appshunter.io/ios/app/duo-alibi/id6759976010)

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

**In-app purchases:** none


### Guess Size

[App page](https://appshunter.io/ios/app/guess-size-scale-game/id6814151950)

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

**In-app purchases:** none


## Frequently asked questions

### Is DUO free?

DUO is free to download, with no in-app purchases.

### Is Guess Size free?

Guess Size is free to download, with no in-app purchases.

### Do DUO or Guess Size have ads?

Neither DUO nor Guess Size shows ads.

### Which is updated more often, DUO or Guess Size?

DUO ships an update daily, and Guess Size every 3 days. Most recently, DUO was updated on November 5, 2026 and Guess Size 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.*