# Blue Light Filter vs UniPalmX

The clearest difference is in-app purchases: UniPalmX at none against Blue Light Filter's 5. UniPalmX also leads on iOS requirement (15.1 vs 17.0). Blue Light Filter's advantage is update cadence (weekly vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Blue Light Filter sells 5 in-app purchases, starting at $4.99 per 7 days. UniPalmX asks for nothing beyond the download.

Blue Light Filter ships an update weekly, UniPalmX monthly. The most recent releases landed on October 21, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Blue Light Filter | UniPalmX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (137 ratings)](https://appshunter.io/ios/app/blue-light-filter/id6463748819/reviews)** | — |
| Number of ratings | **137** | — |
| Positive reviews | 2.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 40 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Rivia Corp s.r.o.](https://appshunter.io/developer/1698333588) | [迪升 吴](https://appshunter.io/developer/1744008567) |

## What reviewers say

### Blue Light Filter

[App page](https://appshunter.io/ios/app/blue-light-filter/id6463748819)

Reduce eye strain and improve sleep with an adjustable blue light filter. Organize your files, photos, and videos with an integrated file manager. Enjoy a seamless web browsing experience with built-in filtering and bookmarking.

**Highlights:** Adjustable blue light filter, Eye strain relief, Improved sleep quality, Intuitive file manager, Zip/unzip support, Integrated web browser

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| 1 month | $6.99 | per month |
| Blue Light Filter - Monthly | $7.99 | per month |
| 1 year | $24.99 | per year |
| Annually | $29.99 | per year |

**What reviewers complain about**

- 💸 Expensive subscription model
- 🚫 Blue light filter limited to app
- ⚠️ Difficult subscription cancellation
- 😠 App not free as expected
- ❌ Poor user interface

**Reported bugs**

- App doesn't open
- App keeps crashing
- App doesn't work on Mac
- Blank 'Trial Page' window
- Free cancellation not working

**Requested features**

- Automatically turn on at login
- Toggle on/off with shortcut key
- Apply blue light filter to entire phone
- More customization options


### UniPalmX

[App page](https://appshunter.io/ios/app/unipalmx/id6760890203)

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

**In-app purchases:** none


## Frequently asked questions

### Is Blue Light Filter free?

Blue Light Filter is free to download, with in-app purchases available.

### Is UniPalmX free?

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

### Do Blue Light Filter or UniPalmX have ads?

Neither Blue Light Filter nor UniPalmX shows ads.

### Which is updated more often, Blue Light Filter or UniPalmX?

Blue Light Filter ships an update weekly, and UniPalmX monthly. Most recently, Blue Light Filter was updated on October 21, 2026 and UniPalmX on September 25, 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.*