# DoD Systems Engineering vs RDS 81346

The clearest difference is iOS requirement: RDS 81346 at 16.4 against DoD Systems Engineering's 26.0. 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.

DoD Systems Engineering ships an update every 5 months, RDS 81346 every 3 months. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | DoD Systems Engineering | RDS 81346 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (4 ratings)](https://appshunter.io/ios/app/dod-systems-engineering/id505317207/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 10 MB | 42 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Russell Shannon](https://appshunter.io/developer/505317310) | [System Engineering AS](https://appshunter.io/developer/1110265192) |

## What reviewers say

### DoD Systems Engineering

[App page](https://appshunter.io/ios/app/dod-systems-engineering/id505317207)

This app serves as a pocket reference for the Department of Defense Systems Engineering Technical Review process. It offers definitions for nearly 250 acronyms, details on Technology Readiness Levels, and in-depth information on review phases and technical processes.

**Highlights:** Acronym lookup (250+ definitions), Technology Readiness Level definitions, Review information by phase, Phase details (Materiel Solutions Analysis to Operations & Support), Technical and technical management processes

**Features:** Vision Pro support

**In-app purchases:** none


### RDS 81346

[App page](https://appshunter.io/ios/app/rds-81346/id1110265193)

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

**In-app purchases:** none


## Frequently asked questions

### Is DoD Systems Engineering free?

DoD Systems Engineering is free to download, with no in-app purchases.

### Is RDS 81346 free?

RDS 81346 is free to download, with no in-app purchases.

### Do DoD Systems Engineering or RDS 81346 have ads?

Neither DoD Systems Engineering nor RDS 81346 shows ads.

### Which is updated more often, DoD Systems Engineering or RDS 81346?

DoD Systems Engineering ships an update every 5 months, and RDS 81346 every 3 months. Most recently, DoD Systems Engineering was updated on October 14, 2026 and RDS 81346 on October 9, 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.*