# ENGEL e vs Smart Belt Drive

The clearest difference is review sentiment: Smart Belt Drive at 67% against ENGEL e's 25%. Smart Belt Drive also leads on iOS requirement (13.4 vs 15.6). ENGEL e's advantage is update cadence (every 6 months vs every 18 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

ENGEL e ships an update every 6 months, Smart Belt Drive every 18 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | ENGEL e | Smart Belt Drive |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.8 (13 ratings)](https://appshunter.io/ios/app/smart-belt-drive/id1093873727/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | 25.0% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 18 months |
| Monetization | Free | Free |
| Size | 27 MB | 14 MB |
| Requires iOS | 15.6 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ENGEL AUSTRIA GmbH](https://appshunter.io/developer/687631542) | [HUTCHINSON](https://appshunter.io/developer/862345826) |

## What reviewers say

### ENGEL e

[App page](https://appshunter.io/ios/app/engel-e-calc/id687631539)

This tool simplifies complex calculations for injection molders, including stroke volume, clamping force, cooling time, and screw speed. Get accurate results quickly and clearly displayed on a single page, eliminating the need for tedious manual computations.

**Highlights:** Calculate stroke volume, Calculate clamping force, Calculate cooling time, Calculate screw speed, Clear, structured results display, Quick calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is ENGEL e free?

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

### Is Smart Belt Drive free?

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

### Do ENGEL e or Smart Belt Drive have ads?

Neither ENGEL e nor Smart Belt Drive shows ads.

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

ENGEL e ships an update every 6 months, and Smart Belt Drive every 18 months. Most recently, ENGEL e was updated on November 6, 2026 and Smart Belt Drive on November 2, 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.*