# ChemTracker vs Blue Light Filter

The clearest difference is review sentiment: ChemTracker at 100% against Blue Light Filter's 3%. ChemTracker also leads on rating (4.4 vs 3.3) and in-app purchases (none vs 5). Blue Light Filter's advantage is ratings volume (137 vs 7). On price, update cadence, 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. ChemTracker asks for nothing beyond the download.

ChemTracker holds the better App Store score, 4.4 against 3.3. That said, the two scores are not equally well evidenced: Blue Light Filter has 137 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 100% of ChemTracker's written reviews are positive against 3% of Blue Light Filter's.

ChemTracker ships an update every 10 days, Blue Light Filter weekly. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | ChemTracker | Blue Light Filter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/chemtracker/id1584781198/reviews)** | [3.3 (137 ratings)](https://appshunter.io/ios/app/blue-light-filter/id6463748819/reviews) |
| Number of ratings | 7 | **137** |
| Positive reviews | **100.0% of reviews** | 2.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 54 MB | 19 MB |
| Requires iOS | **10.2** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 17+ |
| Developer | [Alex Jones](https://appshunter.io/developer/1584781200) | [Rivia Corp s.r.o.](https://appshunter.io/developer/1698333588) |

## What reviewers say

### ChemTracker

[App page](https://appshunter.io/ios/app/chemtracker/id1584781198)

This app provides a secure platform for users worldwide to submit evidence of air pollution. It aims to create a global record of environmental concerns.

**Highlights:** Secure evidence submission, Global user base, Pollution tracking, Environmental data collection

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is ChemTracker free?

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

### Is Blue Light Filter free?

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

### Which has better reviews, ChemTracker or Blue Light Filter?

ChemTracker is rated higher. ChemTracker averages 4.4 out of 5 from 7 ratings, while Blue Light Filter averages 3.3 from 137 ratings.

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

Neither ChemTracker nor Blue Light Filter shows ads.

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

ChemTracker ships an update every 10 days, and Blue Light Filter weekly. Most recently, ChemTracker was updated on October 7, 2026 and Blue Light Filter on October 17, 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.*