# ENGEL e vs PolyTakt

The clearest difference is in-app purchases: ENGEL e at none against PolyTakt's 2. ENGEL e also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.4). PolyTakt's advantage is update cadence (every 2 weeks vs every 4 months). On price and ads there is nothing between them.

Both are free to download. PolyTakt sells 2 in-app purchases, starting at $7.99 per month. ENGEL e asks for nothing beyond the download.

ENGEL e ships an update every 4 months, PolyTakt every 2 weeks. The most recent releases landed on October 9, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | ENGEL e | PolyTakt |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 29 MB | 56 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [ENGEL AUSTRIA GmbH](https://appshunter.io/developer/687631542) | [PolyTakt Limited](https://appshunter.io/developer/6788801107) |

## 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


### PolyTakt

[App page](https://appshunter.io/ios/app/polytakt-injection-molding/id6788801105)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PolyTakt Pro | $7.99 | per month |
| PolyTakt Pro | $69.00 | per year |


## Frequently asked questions

### Is ENGEL e free?

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

### Is PolyTakt free?

PolyTakt is free to download, with in-app purchases available.

### Do ENGEL e or PolyTakt have ads?

Neither ENGEL e nor PolyTakt shows ads.

### Which is updated more often, ENGEL e or PolyTakt?

ENGEL e ships an update every 4 months, and PolyTakt every 2 weeks. Most recently, ENGEL e was updated on October 9, 2026 and PolyTakt on October 17, 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.*