# Hatz HDS²lite vs RPM Squared

The clearest difference is iOS requirement: Hatz HDS²lite at 10.0 against RPM Squared's 12.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Hatz HDS²lite ships an update every 9 months, RPM Squared every 6 months. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Hatz HDS²lite | RPM Squared |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hatz-hdslite/id6446262966/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 months** |
| Monetization | Free | — |
| Size | 90 MB | 31 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Motorenfabrik Hatz GmbH & Co. KG](https://appshunter.io/developer/1677040238) | [Cornell Pump Company](https://appshunter.io/developer/879210510) |

## What reviewers say

### Hatz HDS²lite

[App page](https://appshunter.io/ios/app/hatz-hdslite/id6446262966)

Diagnose Hatz diesel engines wirelessly using your smartphone or tablet. Read error codes, view operating values, reset maintenance indicators, and generate engine reports. Requires the HDS²lite adapter for connection.

**Highlights:** Wireless error code reading, Display current operating values, Reset maintenance indicators, Create and send engine reports, Locate service partners

**In-app purchases:** none


### RPM Squared

[App page](https://appshunter.io/ios/app/rpm-squared/id6480077164)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hatz HDS²lite free?

Hatz HDS²lite is free to download, with no in-app purchases.

### Is RPM Squared free?

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

### Do Hatz HDS²lite or RPM Squared have ads?

Neither Hatz HDS²lite nor RPM Squared shows ads.

### Which is updated more often, Hatz HDS²lite or RPM Squared?

Hatz HDS²lite ships an update every 9 months, and RPM Squared every 6 months. Most recently, Hatz HDS²lite was updated on October 24, 2026 and RPM Squared on October 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*