# THESIS ECM vs TESSA Assistant

The clearest difference is update cadence: TESSA Assistant at monthly against THESIS ECM's every 4 months. TESSA Assistant also leads on iOS requirement (13.4 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, TESSA Assistant monthly. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | THESIS ECM | TESSA Assistant |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Size | 71 MB | 54 MB |
| Requires iOS | 15.1 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Haulmont Development OOO](https://appshunter.io/developer/1033811743) | [ООО «СИНТЕЛЛЕКТ»](https://appshunter.io/developer/1697825323) |

## What reviewers say

### THESIS ECM

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

**In-app purchases:** none


### TESSA Assistant

[App page](https://appshunter.io/ios/app/tessa-assistant/id6451378829)

**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 TESSA Assistant free?

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

### Do THESIS ECM or TESSA Assistant have ads?

Neither THESIS ECM nor TESSA Assistant shows ads.

### Which is updated more often, THESIS ECM or TESSA Assistant?

THESIS ECM ships an update every 4 months, and TESSA Assistant monthly. Most recently, THESIS ECM was updated on October 29, 2026 and TESSA Assistant 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.*