JCSys Reference vs BIG Kaleidos
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
BIG Kaleidos
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BIG Kaleidos provides a way to easily find important data on more than 5000 dangerous substances in English, Dutch, French and German. It includes data about CLP, Emergency Response and much more.
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Verdict
The clearest difference is update cadence: BIG Kaleidos at every 3 months against JCSys Reference's every 21 months. JCSys Reference's advantage is iOS requirement (10.0 vs 14.0). 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, BIG Kaleidos every 3 months. The most recent releases landed on June 5, 2026 and September 10, 2026 respectively.
| Parameter | JCSys Reference | BIG Kaleidos |
|---|---|---|
| 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 | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 9 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Graeme Watson | BIG vzw |
In-app purchases
JCSys Reference
No in-app purchases
BIG Kaleidos
No in-app purchases
Questions
Is JCSys Reference free?
Is BIG Kaleidos free?
Do JCSys Reference or BIG Kaleidos have ads?
Which is updated more often, JCSys Reference or BIG Kaleidos?
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