# DOI Ethics vs Selective Service System

The clearest difference is ratings volume: Selective Service System at 3 against DOI Ethics's 1. On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for DOI Ethics against 5.0 for Selective Service System. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

DOI Ethics ships an update every 3 months, Selective Service System every 4 months. The most recent releases landed on October 3, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | DOI Ethics | Selective Service System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/doi-ethics/id1498505971/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/selective-service-system/id6445855725/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 79 MB | 55 MB |
| Requires iOS | 18.6 | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [U.S. Department of the Interior](https://appshunter.io/developer/1498505970) | [Selective Service System](https://appshunter.io/developer/1674277870) |

## What reviewers say

### DOI Ethics

[App page](https://appshunter.io/ios/app/doi-ethics/id1498505971)

This app offers clear summaries of federal ethics rules and regulations for DOI employees. It includes interactive videos, resources, and a section for completing and submitting DOI-related forms, ensuring easy access to important information.

**Highlights:** Up-to-date federal ethics rules, Summaries of ethics laws, Interactive videos, Handy resources, Forms and Reporting section

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

**In-app purchases:** none


### Selective Service System

[App page](https://appshunter.io/ios/app/selective-service-system/id6445855725)

This app provides resources for volunteers involved in national defense. It offers an electronic library with interactive guides, contact information, FAQs, newsletters, multimedia, and checklists to support their roles in local communities.

**Highlights:** Interactive guides, Contact information, Frequently Asked Questions, Newsletters, Multimedia resources, Checklist archive

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

**In-app purchases:** none


## Frequently asked questions

### Is DOI Ethics free?

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

### Is Selective Service System free?

Selective Service System is free to download, with no in-app purchases.

### Which has better reviews, DOI Ethics or Selective Service System?

DOI Ethics and Selective Service System are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do DOI Ethics or Selective Service System have ads?

Neither DOI Ethics nor Selective Service System shows ads.

### Which is updated more often, DOI Ethics or Selective Service System?

DOI Ethics ships an update every 3 months, and Selective Service System every 4 months. Most recently, DOI Ethics was updated on October 3, 2026 and Selective Service System on September 17, 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.*