# ENGEL e vs Tvenka Machine Maintenance

The clearest difference is update cadence: ENGEL e at every 4 months against Tvenka Machine Maintenance's every 20 months. ENGEL e also leads on iOS requirement (13.0 vs 16.0). 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.

ENGEL e ships an update every 4 months, Tvenka Machine Maintenance every 20 months. The most recent releases landed on July 3, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | ENGEL e | Tvenka Machine Maintenance |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 20 months |
| Monetization | Free | — |
| Size | 29 MB | 181 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ENGEL AUSTRIA GmbH](https://appshunter.io/developer/687631542) | [AugRay](https://appshunter.io/developer/1250287170) |

## 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, Determine clamping force, Estimate cooling time, Calculate screw speed, Clear, structured results display, Quick calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### Tvenka Machine Maintenance

[App page](https://appshunter.io/ios/app/tvenka-machine-maintenance/id6738463139)

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

**In-app purchases:** none


## Frequently asked questions

### Is ENGEL e free?

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

### Is Tvenka Machine Maintenance free?

Tvenka Machine Maintenance is free to download, with no in-app purchases.

### Do ENGEL e or Tvenka Machine Maintenance have ads?

Neither ENGEL e nor Tvenka Machine Maintenance shows ads.

### Which is updated more often, ENGEL e or Tvenka Machine Maintenance?

ENGEL e ships an update every 4 months, and Tvenka Machine Maintenance every 20 months. Most recently, ENGEL e was updated on July 3, 2026 and Tvenka Machine Maintenance on September 19, 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.*