ZDL vs Guardian Call
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ZDL
This platform offers real-time cyber-attack prevention by providing a unique view of adversary preparations. It aims to proactively safeguard enterprises from cyber threats before they occur.
- Proactive cyber-attack prevention
- Real-time adversary monitoring
- Global cyber observatory
- Enterprise-level cyber-warfare capability
- Performance updates and bug fixes
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Blackwired defines a new approach to Threat Intelligence. The flagship Zero Day Live platform is designed to proactively prevent cyber-attacks before they happen. It is the first and only platform delivering cyber-warfare capability accessible to enterprise. The largest cyber observatory in the world with a unique lens on adversaries and their preparations to attack. Zero Day Live’s real time, measurable cyber-attack prevention takes your enterprise out of the victim pool. The team at Blackwired continues to make performance updates, bug fixes and feature rich options to enhance the user experience. Happy hunting.
Guardian Call
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Guardian Call is a simple and secure communication app that allows you to establish a secure call to a specific contact. With just a few taps, you can connect with your trusted contact and have a secure conversation.
Screenshots
Verdict
The clearest difference is iOS requirement: ZDL at 14.0 against Guardian Call's 17.0. On price, update cadence, ads and in-app purchases 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.
Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.
| Parameter | ZDL | Guardian Call |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 4 months | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 23 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Blackwired Pte Ltd. | DSIRF GmbH |
In-app purchases
ZDL
No in-app purchases
Guardian Call
No in-app purchases
