# Улаанбаатар Инженеринг vs EcoTSM

The clearest difference is iOS requirement: Улаанбаатар Инженеринг at 13.0 against EcoTSM's 15.0. 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.

Улаанбаатар Инженеринг ships an update every 10 days, EcoTSM every 6 days. The most recent releases landed on September 26, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Улаанбаатар Инженеринг | EcoTSM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 6 days** |
| Size | 45 MB | 26 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Khan Khulgun LLC](https://appshunter.io/developer/1549621655) | [Erdenebayar Terguunbayar](https://appshunter.io/developer/6787703576) |

## What reviewers say

### Улаанбаатар Инженеринг

[App page](https://appshunter.io/ios/app/id6467168861)

**Features:** macOS Compatibility

**In-app purchases:** none


### EcoTSM

[App page](https://appshunter.io/ios/app/ecotsm/id6787703574)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Улаанбаатар Инженеринг free?

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

### Is EcoTSM free?

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

### Do Улаанбаатар Инженеринг or EcoTSM have ads?

Neither Улаанбаатар Инженеринг nor EcoTSM shows ads.

### Which is updated more often, Улаанбаатар Инженеринг or EcoTSM?

Улаанбаатар Инженеринг ships an update every 10 days, and EcoTSM every 6 days. Most recently, Улаанбаатар Инженеринг was updated on September 26, 2026 and EcoTSM on October 1, 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.*