# Observation vs Chip Duel

The clearest difference is iOS requirement: Observation at 15.1 against Chip Duel's 17.0. 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.

## The numbers

| Metric | Observation | Chip Duel |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 80 MB | 1 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stichting Observation International](https://appshunter.io/developer/1464543487) | [PAUL LUKE BENNETT](https://appshunter.io/developer/6787402193) |

## What reviewers say

### Observation

[App page](https://appshunter.io/ios/app/observation/id6446407612)

**Features:** Vision Pro support

**In-app purchases:** none


### Chip Duel

[App page](https://appshunter.io/ios/app/chip-duel/id6787402191)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Observation free?

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

### Is Chip Duel free?

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

### Do Observation or Chip Duel have ads?

Neither Observation nor Chip Duel shows ads.

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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.*