JCSys Reference vs RDS 81346
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JCSys Reference
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.
- Link 11 message catalogue
- Link 16 message catalogue
- Link 16 NPG list
- Link 22 message catalogue
- Knowledge test
- MODAF View reference
- Acronym finder
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A handy Tactical Data Link (TDL) and MODAF Reference application. Features include: * Link 11 (M Series) message catalogue and descriptions * Link 16 (J Series) message catalogue and descriptions * Link 16 Network Participation Group (NPG) list * Link 22 (FJ Series) message catalogue and descriptions * Knowledge Test - test your knowledge of the Message Numbers and names * MODAF View Reference guide * Acronym Finder - search our list of common TDL Related acronyms
RDS 81346
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The RDS 81346 app helps you to easily look up classification codes to be used in reference designations for technical systems and their documentation, based on the ISO/IEC 81346 standard series for Reference Designation Systems (RDS) for systems and the IEC 61355 standard for classification of documents. You can easily find the proper classification by searching either for letter codes, definitions or technical terms. You can also quickly find your most recently used classification. Examples of common terms from the standards and industry are available for all classes, making it possible to simply search for the name of an object you want to classify and find the proper class.
Screenshots
Verdict
The clearest difference is update cadence: RDS 81346 at every 3 months against JCSys Reference's every 21 months. JCSys Reference's advantage is iOS requirement (10.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
JCSys Reference ships an update every 21 months, RDS 81346 every 3 months. The most recent releases landed on June 5, 2026 and September 22, 2026 respectively.
| Parameter | JCSys Reference | RDS 81346 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 21 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 9 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | Graeme Watson | System Engineering AS |
In-app purchases
JCSys Reference
No in-app purchases
RDS 81346
No in-app purchases
