# Doc Duty vs Infusão Certa

The clearest difference is price: Doc Duty at Free against Infusão Certa's $2.99. Infusão Certa's advantage is update cadence (every 2 days vs every 3 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Doc Duty is free to download; Infusão Certa costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Doc Duty ships an update every 3 weeks, Infusão Certa every 2 days. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Doc Duty | Infusão Certa |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 36 MB | 3 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [GILBERTO ZINN SCHUTZ FILHO](https://appshunter.io/developer/1637909096) | [Nerdcina LTDA](https://appshunter.io/developer/1724318298) |

## What reviewers say

### Doc Duty

[App page](https://appshunter.io/ios/app/doc-duty/id1637998342)

**Features:** macOS Compatibility

**In-app purchases:** none


### Infusão Certa

[App page](https://appshunter.io/ios/app/infusao-certa/id6475583022)

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

**In-app purchases:** none


## Frequently asked questions

### Is Doc Duty free?

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

### Is Infusão Certa free?

Infusão Certa costs $2.99, with no in-app purchases.

### Do Doc Duty or Infusão Certa have ads?

Neither Doc Duty nor Infusão Certa shows ads.

### Which is updated more often, Doc Duty or Infusão Certa?

Doc Duty ships an update every 3 weeks, and Infusão Certa every 2 days. Most recently, Doc Duty was updated on October 18, 2026 and Infusão Certa on October 24, 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.*