# Blue Light Filter vs SparqSync

The clearest difference is in-app purchases: SparqSync at none against Blue Light Filter's 5. SparqSync also leads on iOS requirement (12.0 vs 17.0). Blue Light Filter's advantage is update cadence (weekly vs every 3 months). 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. SparqSync asks for nothing beyond the download.

Blue Light Filter ships an update weekly, SparqSync every 3 months. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Blue Light Filter | SparqSync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (138 ratings)](https://appshunter.io/ios/app/blue-light-filter/id6463748819/reviews)** | — |
| Number of ratings | **138** | — |
| Positive reviews | 2.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 55 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Rivia Corp s.r.o.](https://appshunter.io/developer/1698333588) | [Sparq Systems Inc](https://appshunter.io/developer/1801998157) |

## 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


### SparqSync

[App page](https://appshunter.io/ios/app/sparqsync/id6745278632)

**Features:** macOS Compatibility

**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 SparqSync free?

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

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

Neither Blue Light Filter nor SparqSync shows ads.

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

Blue Light Filter ships an update weekly, and SparqSync every 3 months. Most recently, Blue Light Filter was updated on October 30, 2026 and SparqSync on October 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.*