# Optical Power Meter vs VarIoT

The clearest difference is rating: VarIoT at 5.0 against Optical Power Meter's 2.6. Optical Power Meter's advantage is update cadence (every 12 months vs every 71 months) and ratings volume (5 vs 1). On price, in-app purchases, monetization model and device support there is nothing between them.

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

VarIoT holds the better App Store score, 5.0 against 2.6. That said, the two scores are not equally well evidenced: Optical Power Meter has 5 ratings behind it against 1, so its average is the more settled of the two.

Optical Power Meter ships an update every 12 months, VarIoT every 71 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Optical Power Meter | VarIoT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (5 ratings)](https://appshunter.io/ios/app/optical-power-meter/id665941154/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/variot/id1463585141/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Every 12 months** | Every 71 months |
| Monetization | Free | Free |
| Size | 19 MB | 29 MB |
| Requires iOS | **12.0** | 18.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thorlabs GmbH](https://appshunter.io/developer/662121683) | [American Thermal instruments, Inc.](https://appshunter.io/developer/1055795997) |

## What reviewers say

### Optical Power Meter

[App page](https://appshunter.io/ios/app/optical-power-meter/id665941154)

Control handheld optical power meters remotely via Bluetooth. View power readings on a large gauge and a 5-digit display, with min/max tracking. Adjust basic settings like wavelength and zeroing from your mobile device.

**Highlights:** Remote control via Bluetooth, Large needle gauge display, 5-digit power reading, Minimum and maximum readings, Wavelength correction, Zeroing function

**Features:** macOS Compatibility

**In-app purchases:** none


### VarIoT

[App page](https://appshunter.io/ios/app/variot/id1463585141)

This app reads sensor data from a barcode, providing digital information about product details and temperature exposure. It offers customizable pass/fail options to ensure products remain within specified temperature ranges, streamlining quality inspection.

**Highlights:** Readable sensor indicator, Barcode data interpretation, Temperature threshold monitoring, Customizable pass/fail options, Digital record for quality inspection, Compliance with 8009 (01) standard

**In-app purchases:** none


## Frequently asked questions

### Is Optical Power Meter free?

Optical Power Meter is free to download, with no in-app purchases.

### Is VarIoT free?

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

### Which has better reviews, Optical Power Meter or VarIoT?

VarIoT is rated higher. Optical Power Meter averages 2.6 out of 5 from 5 ratings, while VarIoT averages 5.0 from 1 ratings.

### Which is updated more often, Optical Power Meter or VarIoT?

Optical Power Meter ships an update every 12 months, and VarIoT every 71 months. Most recently, Optical Power Meter was updated on November 1, 2026 and VarIoT on November 3, 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.*