# Klemsan Device Reader vs HMI

The clearest difference is in-app purchases: Klemsan Device Reader at none against HMI's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. HMI sells 1 in-app purchase, starting at $9.99 per month. Klemsan Device Reader asks for nothing beyond the download.

Klemsan Device Reader ships an update every 9 days, HMI fortnightly. The most recent releases landed on October 21, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Klemsan Device Reader | HMI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Fortnightly |
| Monetization | Free | — |
| Size | 8 MB | 68 MB |
| Requires iOS | 13.2 | **12.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Klemsan Elektrik Elektronik AŞ](https://appshunter.io/developer/1316851537) | [MicroClarity Inc.](https://appshunter.io/developer/1114325705) |

## What reviewers say

### Klemsan Device Reader

[App page](https://appshunter.io/ios/app/klemsan-device-reader/id1316851538)

Access real-time data from Klemsan devices with a specialized display for easier reading. Save critical data to your favorites for quick access.

**Highlights:** Instant access to device data, Favorite critical data, Specialized data display, Easy data reading

**Features:** macOS Compatibility

**In-app purchases:** none


### HMI

[App page](https://appshunter.io/ios/app/hmi-opc-uamodbusmqttplcs/id6475274586)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $9.99 | per month |


## Frequently asked questions

### Is Klemsan Device Reader free?

Klemsan Device Reader is free to download, with no in-app purchases.

### Is HMI free?

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

### Do Klemsan Device Reader or HMI have ads?

Neither Klemsan Device Reader nor HMI shows ads.

### Which is updated more often, Klemsan Device Reader or HMI?

Klemsan Device Reader ships an update every 9 days, and HMI fortnightly. Most recently, Klemsan Device Reader was updated on October 21, 2026 and HMI on September 8, 2026.

---

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