# Smart Belt Drive vs RSR Alignment App

Smart Belt Drive and RSR Alignment App both sit at 2.8 stars, but that hides the real split: 67% of Smart Belt Drive's written reviews are positive against 0% of RSR Alignment App's. Smart Belt Drive also leads on ratings volume (13 vs 4). RSR Alignment App's advantage is update cadence (every 3 months vs every 18 months) and iOS requirement (11.0 vs 13.4). On price, rating, 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.

RSR Alignment App holds the better App Store score, 3.0 against 2.8. Both are backed by a comparable volume of ratings — 13 and 4 respectively. Written reviews complicate that: 67% of Smart Belt Drive's written reviews are positive against 0% of RSR Alignment App's, so the app with the better star average is not the one people write more warmly about.

Smart Belt Drive ships an update every 18 months, RSR Alignment App every 3 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Smart Belt Drive | RSR Alignment App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (13 ratings)](https://appshunter.io/ios/app/smart-belt-drive/id1093873727/reviews) | **[3.0 (4 ratings)](https://appshunter.io/ios/app/rsr-alignment-app/id1503116170/reviews)** |
| Number of ratings | **13** | 4 |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 14 MB | 57 MB |
| Requires iOS | 13.4 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HUTCHINSON](https://appshunter.io/developer/862345826) | [TMC CO.,LTD](https://appshunter.io/developer/920283832) |

## 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


### RSR Alignment App

[App page](https://appshunter.io/ios/app/rsr-alignment-app/id1503116170)

Measure camber and toe angles using your smartphone. The app displays angles for all four corners, allows zero point adjustment, and stores measurement data for later reference. It also lets you change the measurement interval.

**Highlights:** Measure camber angle, Measure toe angle, Display four-corner angles, Zero point adjustment, Store measurement data, Change measurement interval

**Features:** macOS Compatibility

**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 RSR Alignment App free?

RSR Alignment App is free to download, with no in-app purchases.

### Which has better reviews, Smart Belt Drive or RSR Alignment App?

RSR Alignment App is rated higher. Smart Belt Drive averages 2.8 out of 5 from 13 ratings, while RSR Alignment App averages 3.0 from 4 ratings.

### Do Smart Belt Drive or RSR Alignment App have ads?

Neither Smart Belt Drive nor RSR Alignment App shows ads.

### Which is updated more often, Smart Belt Drive or RSR Alignment App?

Smart Belt Drive ships an update every 18 months, and RSR Alignment App every 3 months. Most recently, Smart Belt Drive was updated on November 2, 2026 and RSR Alignment App on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*