# Smart Belt Drive vs React

The clearest difference is update cadence: React at every 2 months against Smart Belt Drive's every 18 months. On price, ads, in-app purchases 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.

Smart Belt Drive ships an update every 18 months, React every 2 months. The most recent releases landed on October 24, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Smart Belt Drive | React |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (13 ratings)](https://appshunter.io/ios/app/smart-belt-drive/id1093873727/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 14 MB | 27 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HUTCHINSON](https://appshunter.io/developer/862345826) | [Fibermetrix](https://appshunter.io/developer/1719628564) |

## What reviewers say

### Smart Belt Drive

[App page](https://appshunter.io/ios/app/smart-belt-drive/id1093873727)

This application provides a comprehensive diagnostic tool for belt drive systems. It measures key parameters like pulley speeds, belt frequency, tension, and system geometry to ensure optimal performance, energy efficiency, and extended service life.

**Highlights:** Pulley rotary speed measurement, Belt frequency and tension measurement, System geometry and misalignment measurement, Comprehensive belt drive system check-up, Performance and energy efficiency analysis

**Features:** macOS Compatibility

**In-app purchases:** none


### React

[App page](https://appshunter.io/ios/app/react-fibermetrix/id6473738508)

**In-app purchases:** none


## Frequently asked questions

### Is Smart Belt Drive free?

Smart Belt Drive is free to download, with no in-app purchases.

### Is React free?

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

### Do Smart Belt Drive or React have ads?

Neither Smart Belt Drive nor React shows ads.

### Which is updated more often, Smart Belt Drive or React?

Smart Belt Drive ships an update every 18 months, and React every 2 months. Most recently, Smart Belt Drive was updated on October 24, 2026 and React on October 4, 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.*