# STEMAX Private vs МАСС

The clearest difference is update cadence: МАСС at every 3 weeks against STEMAX Private's every 55 months. STEMAX Private's advantage is iOS requirement (12.0 vs 16.0). 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.

STEMAX Private ships an update every 55 months, МАСС every 3 weeks. The most recent releases landed on October 7, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | STEMAX Private | МАСС |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 55 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 3 MB | 48 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [НПП Стелс](https://appshunter.io/developer/1293122923) | [Единый сервис «Мой Двор»](https://appshunter.io/developer/1450202297) |

## What reviewers say

### STEMAX Private

[App page](https://appshunter.io/ios/app/stemax-private/id1126250277)

This utility allows users to send SMS commands and make calls to Privat series controllers with a single button press. It provides a unified list of objects with detailed sections, event logs, and access to the controller's voice menu. Monitor temperature, SIM card balance, power status, and manage control outputs.

**Highlights:** Send SMS commands to controllers, Check controller status, View event logs, Access voice menu, Monitor temperature and balance, Manage control outputs

**Features:** macOS Compatibility

**In-app purchases:** none


### МАСС

[App page](https://appshunter.io/ios/app/id1630303679)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is STEMAX Private free?

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

### Is МАСС free?

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

### Do STEMAX Private or МАСС have ads?

Neither STEMAX Private nor МАСС shows ads.

### Which is updated more often, STEMAX Private or МАСС?

STEMAX Private ships an update every 55 months, and МАСС every 3 weeks. Most recently, STEMAX Private was updated on October 7, 2026 and МАСС on October 27, 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.*