# Timer | Interval vs CogniTrack

The clearest difference is in-app purchases: CogniTrack at none against Timer | Interval's 1. Timer | Interval's advantage is iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Timer | Interval sells 1 one-off in-app purchase. CogniTrack asks for nothing beyond the download.

## The numbers

| Metric | Timer | Interval | CogniTrack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cognitrack-reaction-time-test/id6760599542/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 days | — |
| Monetization | — | Free |
| Size | 44 MB | 3 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MICAH JOHN WALKER](https://appshunter.io/developer/1877508805) | [Diffuse Thinking LLC](https://appshunter.io/developer/1692715488) |

## What reviewers say

### Timer | Interval

[App page](https://appshunter.io/ios/app/timer-interval/id6759624277)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Timer \| Interval | $2.99 | one-time |


### CogniTrack

[App page](https://appshunter.io/ios/app/cognitrack-reaction-time-test/id6760599542)

Measure your mental alertness with a scientifically validated reaction time test. Track changes in focus and fatigue throughout the day to understand your cognitive performance and make informed decisions about rest and routines.

**Highlights:** Scientifically validated reaction time test, Track mental alertness and fatigue, Personal baseline setting, Trend charts for performance visualization, Performance ratings relative to baseline, Data export and import, Privacy-focused, data stays on device

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

**In-app purchases:** none


## Frequently asked questions

### Is Timer | Interval free?

Timer | Interval is free to download, with in-app purchases available.

### Is CogniTrack free?

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

### Do Timer | Interval or CogniTrack have ads?

Neither Timer | Interval nor CogniTrack 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.*