# Concentration Card vs Three is All

Concentration Card and Three is All are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Concentration Card | Three is All |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Size | 135 MB | 5 MB |
| Requires iOS | **12.4** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RamSystem](https://appshunter.io/developer/393507698) | [逵逵 沈](https://appshunter.io/developer/617643493) |

## What reviewers say

### Concentration Card

[App page](https://appshunter.io/ios/app/concentration-card/id6449998586)

**Features:** macOS Compatibility

**In-app purchases:** none


### Three is All

[App page](https://appshunter.io/ios/app/three-is-all/id6462879771)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Concentration Card free?

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

### Is Three is All free?

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

### Do Concentration Card or Three is All have ads?

Both Concentration Card and Three is All show 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.*