# Gradual Nightlight vs Illustra

The clearest difference is update cadence: Gradual Nightlight at every 2 weeks against Illustra's every 2 months. Gradual Nightlight also leads on iOS requirement (16.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Gradual Nightlight sells 1 one-off in-app purchase and Illustra sells 2 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

Gradual Nightlight ships an update every 2 weeks, Illustra every 2 months. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Gradual Nightlight | Illustra |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Size | 3 MB | 18 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alterscope Solutions LLC](https://appshunter.io/developer/1551052588) | [JOAO FELIPE OLIVEIRA FLORIANO DE SOUZA](https://appshunter.io/developer/6798350175) |

## What reviewers say

### Gradual Nightlight

[App page](https://appshunter.io/ios/app/gradual-nightlight/id6468366809)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gradual Nightlight: US English | $0.99 | one-time |


### Illustra

[App page](https://appshunter.io/ios/app/illustra-highlight-scanner/id6798350173)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $14.99 | per month |
| Annual Subscription | $119.99 | per year |


## Frequently asked questions

### Is Gradual Nightlight free?

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

### Is Illustra free?

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

### Do Gradual Nightlight or Illustra have ads?

Neither Gradual Nightlight nor Illustra shows ads.

### Which is updated more often, Gradual Nightlight or Illustra?

Gradual Nightlight ships an update every 2 weeks, and Illustra every 2 months. Most recently, Gradual Nightlight was updated on October 30, 2026 and Illustra on October 29, 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.*