# illumy vs Stroop Test J Lite

The clearest difference is ads: illumy at none against Stroop Test J Lite's shown. illumy also leads on update cadence (every 4 months vs every 36 months) and monetization model (free vs ad-supported). On price, 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.

illumy ships an update every 4 months, Stroop Test J Lite every 36 months. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | illumy | Stroop Test J Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/illumy/id1067364669/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 months** | Every 36 months |
| Monetization | **Free** | Ad-supported |
| Size | 4 MB | 4 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sound-Oasis](https://appshunter.io/developer/771010118) | [Takuya Kawakami](https://appshunter.io/developer/721449462) |

## What reviewers say

### illumy

[App page](https://appshunter.io/ios/app/illumy/id1067364669)

Control a premium sleep and wake mask with sunrise and sunset simulation. Customize alarm settings, sunset/sunrise lengths, and sleep enhancement features for a better sleep experience.

**Highlights:** Built-in Alarm, Silent Alarm Setting, Custom Sunset/Sunrise Length, Sleep Enhance, Home/Away Time Setting

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

**In-app purchases:** none


### Stroop Test J Lite

[App page](https://appshunter.io/ios/app/stroop-test-j-lite/id1095231198)

This app measures response inhibition and attention by presenting a classic cognitive test. It helps assess potential frontal lobe dysfunction and interference processing. Results indicate time taken and errors, with higher scores suggesting greater impairment.

**Highlights:** Response inhibition assessment, Attention division test, Measures time to complete, Counts mistakes, Interference processing evaluation

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

**In-app purchases:** none


## Frequently asked questions

### Is illumy free?

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

### Is Stroop Test J Lite free?

Stroop Test J Lite is free to download, with no in-app purchases.

### Do illumy or Stroop Test J Lite have ads?

Stroop Test J Lite shows ads; illumy does not.

### Which is updated more often, illumy or Stroop Test J Lite?

illumy ships an update every 4 months, and Stroop Test J Lite every 36 months. Most recently, illumy was updated on October 10, 2026 and Stroop Test J Lite on October 24, 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.*