# DoD Systems Engineering vs Navy App Locker

The clearest difference is review sentiment: DoD Systems Engineering at 50% against Navy App Locker's 3%. DoD Systems Engineering also leads on rating (3.8 vs 1.9) and update cadence (every 5 months vs every 13 months). Navy App Locker's advantage is ratings volume (161 vs 4) and device support (3 vs 1). On price, ads, in-app purchases and monetization model 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 holds the better App Store score, 3.8 against 1.9. That said, the two scores are not equally well evidenced: Navy App Locker has 161 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 50% of DoD Systems Engineering's written reviews are positive against 3% of Navy App Locker's.

DoD Systems Engineering ships an update every 5 months, Navy App Locker every 13 months. The most recent releases landed on September 29, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | DoD Systems Engineering | Navy App Locker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (4 ratings)](https://appshunter.io/ios/app/dod-systems-engineering/id505317207/reviews)** | [1.9 (161 ratings)](https://appshunter.io/ios/app/navy-app-locker/id1161811093/reviews) |
| Number of ratings | 4 | **161** |
| Positive reviews | **50.0% of reviews** | 2.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 13 months |
| Monetization | Free | Free |
| Size | 10 MB | 15 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Russell Shannon](https://appshunter.io/developer/505317310) | [Program Executive Office for Enterprise Information Systems, Sea Warrior Program](https://appshunter.io/developer/1477503418) |

## 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


### Navy App Locker

[App page](https://appshunter.io/ios/app/navy-app-locker/id1161811093)

This official U.S. Navy mobile service provides a centralized platform to discover and download apps developed by the Navy. It offers detailed information, screenshots, and direct links to commercial app stores, including training applications that can submit course credits.

**Highlights:** Discover U.S. Navy mobile apps, Direct download links to app stores, View app details, screenshots, and links, Find Navy training apps, Submit training credits to ETJ, Search and filter apps by category, Suggest new apps and provide feedback

**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 Navy App Locker free?

Navy App Locker is free to download, with no in-app purchases.

### Which has better reviews, DoD Systems Engineering or Navy App Locker?

DoD Systems Engineering is rated higher. DoD Systems Engineering averages 3.8 out of 5 from 4 ratings, while Navy App Locker averages 1.9 from 161 ratings.

### Do DoD Systems Engineering or Navy App Locker have ads?

Neither DoD Systems Engineering nor Navy App Locker shows ads.

### Which is updated more often, DoD Systems Engineering or Navy App Locker?

DoD Systems Engineering ships an update every 5 months, and Navy App Locker every 13 months. Most recently, DoD Systems Engineering was updated on September 29, 2026 and Navy App Locker 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.*