# DoD Systems Engineering vs Bible Rolodex

The clearest difference is update cadence: Bible Rolodex at every 11 days against DoD Systems Engineering's every 5 months. Bible Rolodex also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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, Bible Rolodex every 11 days. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | DoD Systems Engineering | Bible Rolodex |
| --- | --- | --- |
| 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 11 days** |
| Monetization | Free | — |
| Size | 10 MB | 353 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 12+ |
| Developer | [Russell Shannon](https://appshunter.io/developer/505317310) | [Chainbreaker Technology LLC](https://appshunter.io/developer/6790620430) |

## 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


### Bible Rolodex

[App page](https://appshunter.io/ios/app/bible-rolodex/id6818075501)

**Features:** 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 Bible Rolodex free?

Bible Rolodex is free to download, with no in-app purchases.

### Do DoD Systems Engineering or Bible Rolodex have ads?

Neither DoD Systems Engineering nor Bible Rolodex shows ads.

### Which is updated more often, DoD Systems Engineering or Bible Rolodex?

DoD Systems Engineering ships an update every 5 months, and Bible Rolodex every 11 days. Most recently, DoD Systems Engineering was updated on November 1, 2026 and Bible Rolodex 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.*