# Smart Obras vs Doss Engenharia

The clearest difference is update cadence: Doss Engenharia at every 3 weeks against Smart Obras's every 3 months. 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.

Smart Obras ships an update every 3 months, Doss Engenharia every 3 weeks. The most recent releases landed on October 29, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Smart Obras | Doss Engenharia |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 21 MB | 11 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Wesley Souza](https://appshunter.io/developer/1270810572) | [Felipe Ferezini](https://appshunter.io/developer/1593919262) |

## What reviewers say

### Smart Obras

[App page](https://appshunter.io/ios/app/smart-obras/id1270810573)

**Features:** macOS Compatibility

**In-app purchases:** none


### Doss Engenharia

[App page](https://appshunter.io/ios/app/doss-engenharia/id1593919260)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Smart Obras free?

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

### Is Doss Engenharia free?

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

### Do Smart Obras or Doss Engenharia have ads?

Neither Smart Obras nor Doss Engenharia shows ads.

### Which is updated more often, Smart Obras or Doss Engenharia?

Smart Obras ships an update every 3 months, and Doss Engenharia every 3 weeks. Most recently, Smart Obras was updated on October 29, 2026 and Doss Engenharia 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.*