# IST vs myDOOR Dierre

The clearest difference is update cadence: myDOOR Dierre at every 2 months against IST's every 37 months. IST's advantage is iOS requirement (9.0 vs 12.0). 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.

IST ships an update every 37 months, myDOOR Dierre every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | IST | myDOOR Dierre |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 137 MB | 40 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IST-MyDoor](https://appshunter.io/developer/1370246239) | [Dierre Spa](https://appshunter.io/developer/450736225) |

## What reviewers say

### IST

[App page](https://appshunter.io/ios/app/ist-view/id1450580106)

**Features:** macOS Compatibility

**In-app purchases:** none


### myDOOR Dierre

[App page](https://appshunter.io/ios/app/mydoor-dierre/id1545899347)

Control your door lock remotely using Bluetooth Low Energy technology. Manage settings, grant access, and open or close your door with an intuitive smartphone interface.

**Highlights:** Remote door lock control, Bluetooth LE connectivity, Access management, Guest profile management, Key-Fob radio control, Open and close door

**In-app purchases:** none


## Frequently asked questions

### Is IST free?

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

### Is myDOOR Dierre free?

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

### Do IST or myDOOR Dierre have ads?

Neither IST nor myDOOR Dierre shows ads.

### Which is updated more often, IST or myDOOR Dierre?

IST ships an update every 37 months, and myDOOR Dierre every 2 months. Most recently, IST was updated on November 2, 2026 and myDOOR Dierre on November 3, 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.*