# Correctly vs Attention Lab

The clearest difference is ads: Attention Lab at none against Correctly's shown. Attention Lab also leads on update cadence (weekly vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Correctly sells 3 in-app purchases, starting at $0.99 per month and Attention Lab sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Correctly ships an update every 2 months, Attention Lab weekly. The most recent releases landed on October 19, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Correctly | Attention Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Weekly** |
| Size | 28 MB | 39 MB |
| Requires iOS | **13.0** | 14.0.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ivan Gastilovic](https://appshunter.io/developer/1599069138) | [KALLUM MARTIN](https://appshunter.io/developer/1896514205) |

## What reviewers say

### Correctly

[App page](https://appshunter.io/ios/app/correctly/id6748249287)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month No Ads | $0.99 | per month |
| 6 Months No Ads | $4.99 | per 6 months |
| 1 Year No Ads | $8.99 | per year |


### Attention Lab

[App page](https://appshunter.io/ios/app/attention-lab/id6767850515)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $0.99 | one-time |


## Frequently asked questions

### Is Correctly free?

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

### Is Attention Lab free?

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

### Do Correctly or Attention Lab have ads?

Correctly shows ads; Attention Lab does not.

### Which is updated more often, Correctly or Attention Lab?

Correctly ships an update every 2 months, and Attention Lab weekly. Most recently, Correctly was updated on October 19, 2026 and Attention Lab on October 9, 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.*