# SmartPro Instrument vs Gemetrix

The clearest difference is review sentiment: Gemetrix at 50% against SmartPro Instrument's 0%. Gemetrix also leads on rating (2.2 vs 1.8) and iOS requirement (10.3 vs 15.6). On price, ratings volume, update cadence and ads there is nothing between them.

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

Gemetrix holds the better App Store score, 2.2 against 1.8. Both are backed by a comparable volume of ratings — 8 and 5 respectively. Written reviews point the same way: 0% of SmartPro Instrument's written reviews are positive against 50% of Gemetrix's.

SmartPro Instrument ships an update every 2 months, Gemetrix monthly. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SmartPro Instrument | Gemetrix |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (8 ratings)](https://appshunter.io/ios/app/smartpro-instrument/id1341580615/reviews) | **[2.2 (5 ratings)](https://appshunter.io/ios/app/gemetrix/id1363103077/reviews)** |
| Number of ratings | **8** | 5 |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free | Free |
| Size | 44 MB | 18 MB |
| Requires iOS | 15.6 | **10.3** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [SmartPro Instrument Co., Ltd.](https://appshunter.io/developer/1341580614) | [John Chapman](https://appshunter.io/developer/1363103076) |

## What reviewers say

### SmartPro Instrument

[App page](https://appshunter.io/ios/app/smartpro-instrument/id1341580615)

This app displays measurement test results synchronized with specialized devices. It allows users to generate, share, and print certifications for diamonds and other gemstones after completing required tests.

**Highlights:** Synchronized measurement test results, Generate gemstone certifications, Share and print certifications, Supports Diamonds, Moissanites, CVD/HPHT, Works with multiple SmartPro devices

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

**In-app purchases:** none


### Gemetrix

[App page](https://appshunter.io/ios/app/gemetrix/id1363103077)

Control your smartphone camera's exposure, ISO, color temperature, and focus for both short-wave and long-wave UV illuminations. Compare captured images side-by-side or with a slider, and save them with clear labeling.

**Highlights:** UV illumination control (SWUV & LWUV), Adjustable exposure, ISO, color temperature, focus, Side-by-side image comparison, Image slider comparison, Save labeled images

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SmartPro Instrument free?

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

### Is Gemetrix free?

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

### Which has better reviews, SmartPro Instrument or Gemetrix?

Gemetrix is rated higher. SmartPro Instrument averages 1.8 out of 5 from 8 ratings, while Gemetrix averages 2.2 from 5 ratings.

### Do SmartPro Instrument or Gemetrix have ads?

Neither SmartPro Instrument nor Gemetrix shows ads.

### Which is updated more often, SmartPro Instrument or Gemetrix?

SmartPro Instrument ships an update every 2 months, and Gemetrix monthly. Most recently, SmartPro Instrument was updated on October 29, 2026 and Gemetrix on October 24, 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.*