# simalube CalPro vs Machine Defender

The clearest difference is update cadence: Machine Defender at every 8 months against simalube CalPro's every 48 months. simalube CalPro's advantage is iOS requirement (9.0 vs 12.1). 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.

simalube CalPro ships an update every 48 months, Machine Defender every 8 months. The most recent releases landed on September 19, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | simalube CalPro | Machine Defender |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/machine-defender/id1496754747/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 48 months | **Every 8 months** |
| Monetization | — | Free |
| Size | 1 MB | 274 MB |
| Requires iOS | **9.0** | 12.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [biwac websolutions ag](https://appshunter.io/developer/567668974) | [ACOEM Group](https://appshunter.io/developer/1495816959) |

## What reviewers say

### simalube CalPro

[App page](https://appshunter.io/ios/app/simalube-calpro/id567668971)

**Features:** macOS Compatibility

**In-app purchases:** none


### Machine Defender

[App page](https://appshunter.io/ios/app/machine-defender/id1496754747)

This app, used with a wireless vibration sensor, collects and analyzes vibration data from industrial rotating machinery. It automatically detects faults in components like motors and pumps, providing diagnostic reports and maintenance recommendations.

**Highlights:** Wireless vibration data collection, Automatic fault detection with AI, Machine health assessment, Maintenance recommendations, Report storage and sharing, Cloud platform connectivity

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is simalube CalPro free?

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

### Is Machine Defender free?

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

### Do simalube CalPro or Machine Defender have ads?

Neither simalube CalPro nor Machine Defender shows ads.

### Which is updated more often, simalube CalPro or Machine Defender?

simalube CalPro ships an update every 48 months, and Machine Defender every 8 months. Most recently, simalube CalPro was updated on September 19, 2026 and Machine Defender 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.*