# Z21 mobile vs Dremel

Z21 mobile and Dremel both sit at 4.4 stars, but that hides the real split: 50% of Z21 mobile's written reviews are positive against 21% of Dremel's. Z21 mobile also leads on iOS requirement (6.1.6 vs 18.0). Dremel's advantage is ratings volume (19 vs 5). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.4 for Z21 mobile against 4.4 for Dremel. Both are backed by a comparable volume of ratings — 5 and 19 respectively. Written reviews are what separate them: 50% of Z21 mobile's written reviews are positive against 21% of Dremel's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 11, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Z21 mobile | Dremel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (5 ratings)](https://appshunter.io/ios/app/z21-mobile/id533805539/reviews) | **[4.4 (19 ratings)](https://appshunter.io/ios/app/dremel/id1577928986/reviews)** |
| Number of ratings | 5 | **19** |
| Positive reviews | **50.0% of reviews** | 21.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 27 MB | 193 MB |
| Requires iOS | **6.1.6** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Modelleisenbahn GmbH](https://appshunter.io/developer/533805542) | [Bosch US](https://appshunter.io/developer/1200374538) |

## What reviewers say

### Z21 mobile

[App page](https://appshunter.io/ios/app/z21-mobile/id533805539)

Control your model train layout and locomotives from your iOS device. Manage your locomotive library, program digital components, and operate trains with touch controls. A demo mode is available.

**Highlights:** Connect to Z21 Digital Center, Manage locomotive libraries, Control locomotives (DCC/Motorola), Program digital components, Intuitive graphic interface, Locomotive function control

**In-app purchases:** none


### Dremel

[App page](https://appshunter.io/ios/app/dremel/id1577928986)

This app connects to a smart rotary tool to provide usage insights, performance alerts, and speed recommendations. It helps users find the right accessories and settings for their projects, monitor tool battery life, and manage tool health.

**Highlights:** Bluetooth pairing with smart rotary tool, Accessory and speed recommendations, Tool dashboard with battery and usage time, Performance alerts and preventative tips, Accessory guides for various Dremel tools, Material guide for rotary tool accessories

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Z21 mobile free?

Z21 mobile is free to download, with no in-app purchases.

### Is Dremel free?

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

### Which has better reviews, Z21 mobile or Dremel?

Dremel is rated higher. Z21 mobile averages 4.4 out of 5 from 5 ratings, while Dremel averages 4.4 from 19 ratings.

### Do Z21 mobile or Dremel have ads?

Neither Z21 mobile nor Dremel shows ads.

### Which is updated more often, Z21 mobile or Dremel?

Z21 mobile ships an update every 2 months, and Dremel every 2 months. Most recently, Z21 mobile was updated on October 11, 2026 and Dremel on October 12, 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.*