# JCSys Reference vs MyCrimp

The clearest difference is update cadence: MyCrimp at every 5 months against JCSys Reference's every 21 months. MyCrimp also leads on rating (5.0 vs 4.8). JCSys Reference's advantage is iOS requirement (10.0 vs 13.0). On price, ratings volume, 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.

MyCrimp holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 5 and 3 respectively.

JCSys Reference ships an update every 21 months, MyCrimp every 5 months. The most recent releases landed on October 21, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | JCSys Reference | MyCrimp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (5 ratings)](https://appshunter.io/ios/app/jcsys-reference/id584340426/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/mycrimp-nrp-jones/id958265995/reviews)** |
| Number of ratings | **5** | 3 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 9 MB | 9 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Graeme Watson](https://appshunter.io/developer/574479647) | [Custom Machining Services Inc.](https://appshunter.io/developer/880328152) |

## What reviewers say

### JCSys Reference

[App page](https://appshunter.io/ios/app/jcsys-reference/id584340426)

This application provides a comprehensive reference for Tactical Data Links (TDL) and MODAF. It includes detailed catalogues for Link 11, Link 16, and Link 22 messages, along with network participation group information and an acronym finder.

**Highlights:** Link 11 message catalogue, Link 16 message catalogue, Link 16 NPG list, Link 22 message catalogue, Knowledge test, MODAF View reference, Acronym finder

**Features:** macOS Compatibility

**In-app purchases:** none


### MyCrimp

[App page](https://appshunter.io/ios/app/mycrimp-nrp-jones/id958265995)

Access up-to-date specifications for crimping hydraulic hoses and fittings. Search by hose style, coupling style, size, and crimper. Find correct product numbers with a cross-reference tool.

**Highlights:** Hydraulic hose and fitting crimp specifications, Search by hose style, coupling style, size, and crimper, Cross-reference for NRP Jones product numbers, Setup and crimping guidance, Up-to-date specification data

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JCSys Reference free?

JCSys Reference is free to download, with no in-app purchases.

### Is MyCrimp free?

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

### Which has better reviews, JCSys Reference or MyCrimp?

MyCrimp is rated higher. JCSys Reference averages 4.8 out of 5 from 5 ratings, while MyCrimp averages 5.0 from 3 ratings.

### Do JCSys Reference or MyCrimp have ads?

Neither JCSys Reference nor MyCrimp shows ads.

### Which is updated more often, JCSys Reference or MyCrimp?

JCSys Reference ships an update every 21 months, and MyCrimp every 5 months. Most recently, JCSys Reference was updated on October 21, 2026 and MyCrimp on October 14, 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.*