# Human Digestive System Guide vs U.S. Citizenship Study Cards

The clearest difference is iOS requirement: Human Digestive System Guide at 6.0 against U.S. Citizenship Study Cards's 13.0. 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.

Human Digestive System Guide ships an update every 3 months, U.S. Citizenship Study Cards every 2 months. The most recent releases landed on October 13, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Human Digestive System Guide | U.S. Citizenship Study Cards |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/us-citizenship-study-cards/id6499311658/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 12 MB | 27 MB |
| Requires iOS | **6.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [rahul baweja](https://appshunter.io/developer/804610215) | [rdvxsoftware LLC](https://appshunter.io/developer/1743152281) |

## What reviewers say

### Human Digestive System Guide

[App page](https://appshunter.io/ios/app/human-digestive-system-guide/id1083469948)

**Features:** macOS Compatibility

**In-app purchases:** none


### U.S. Citizenship Study Cards

[App page](https://appshunter.io/ios/app/us-citizenship-study-cards/id6499311658)

Prepare for the U.S. citizenship exam with this free app. It breaks down study material into manageable sections, allows you to track progress, and offers personalized retakes of missed questions. Study efficiently in your preferred language and theme.

**Highlights:** Completely free access, Select study topics, Track learning progress, Retake missed questions, Dark/light theme options, Multiple language support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Human Digestive System Guide free?

Human Digestive System Guide is free to download, with no in-app purchases.

### Is U.S. Citizenship Study Cards free?

U.S. Citizenship Study Cards is free to download, with no in-app purchases.

### Do Human Digestive System Guide or U.S. Citizenship Study Cards have ads?

Neither Human Digestive System Guide nor U.S. Citizenship Study Cards shows ads.

### Which is updated more often, Human Digestive System Guide or U.S. Citizenship Study Cards?

Human Digestive System Guide ships an update every 3 months, and U.S. Citizenship Study Cards every 2 months. Most recently, Human Digestive System Guide was updated on October 13, 2026 and U.S. Citizenship Study Cards on October 20, 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.*