# Hoya Sensor vs 4i Toolbox

The clearest difference is rating: 4i Toolbox at 5.0 against Hoya Sensor's 3.0. 4i Toolbox also leads on update cadence (every 3 months vs every 28 months). Hoya Sensor's advantage is iOS requirement (11.0 vs 14.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

4i Toolbox holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Hoya Sensor ships an update every 28 months, 4i Toolbox every 3 months. The most recent releases landed on October 11, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Hoya Sensor | 4i Toolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/hoya-sensor/id1202812114/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/4i-toolbox/id1528199917/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 31 MB | 44 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hoya Vision Care Europe](https://appshunter.io/developer/492618708) | [4i Platform Inc.](https://appshunter.io/developer/1566439336) |

## What reviewers say

### Hoya Sensor

[App page](https://appshunter.io/ios/app/hoya-sensor/id1202812114)

This app educates patients about blue light and UV protection lenses through simulations and images. It also allows for measuring blue light and UV radiation from various sources with a special device.

**Highlights:** Blue light blocking lens explanation, Blue light and UV radiation measurement, Simulations and images, Patient education tool, UV protection lens benefits

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

**In-app purchases:** none


### 4i Toolbox

[App page](https://appshunter.io/ios/app/4i-toolbox/id1528199917)

Configure, set up, and run analyses on hardware devices remotely. Monitor devices in real time, track signals, and control DOT PLCs. Offers personalized customer support from experts.

**Highlights:** Remote device setup and configuration, Real-time device supervision, Signal tracking, DOT PLC control, Hardware analysis, Personalized customer support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hoya Sensor free?

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

### Is 4i Toolbox free?

4i Toolbox is free to download, with no in-app purchases.

### Which has better reviews, Hoya Sensor or 4i Toolbox?

4i Toolbox is rated higher. Hoya Sensor averages 3.0 out of 5 from 2 ratings, while 4i Toolbox averages 5.0 from 1 ratings.

### Do Hoya Sensor or 4i Toolbox have ads?

Neither Hoya Sensor nor 4i Toolbox shows ads.

### Which is updated more often, Hoya Sensor or 4i Toolbox?

Hoya Sensor ships an update every 28 months, and 4i Toolbox every 3 months. Most recently, Hoya Sensor was updated on October 11, 2026 and 4i Toolbox on October 8, 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.*