# THESIS ECM vs СЭД

The clearest difference is update cadence: СЭД at every 10 days against THESIS ECM's every 4 months. СЭД also leads on iOS requirement (11.0 vs 15.1). 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.

THESIS ECM ships an update every 4 months, СЭД every 10 days. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | THESIS ECM | СЭД |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 10 days** |
| Size | 71 MB | 136 MB |
| Requires iOS | 15.1 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Haulmont Development OOO](https://appshunter.io/developer/1033811743) | [Popolitov Evgenyi](https://appshunter.io/developer/1541860378) |

## What reviewers say

### THESIS ECM

[App page](https://appshunter.io/ios/app/thesis-ecm/id1343191505)

**In-app purchases:** none


### СЭД

[App page](https://appshunter.io/ios/app/id1564584363)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is THESIS ECM free?

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

### Is СЭД free?

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

### Do THESIS ECM or СЭД have ads?

Neither THESIS ECM nor СЭД shows ads.

### Which is updated more often, THESIS ECM or СЭД?

THESIS ECM ships an update every 4 months, and СЭД every 10 days. Most recently, THESIS ECM was updated on October 29, 2026 and СЭД 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.*