ZDL vs D1 Journal
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.
D1 Journal
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D1 is a simple yet highly secure platform where you can confidently detail thoughts, plans, or any sensitive information you want accessible exclusively only to you. D1 uses powerful AES256 encryption and industry standard cryptography techniques to block access to your data from potential attackers. Your passwords and PINs are immediately hashed after you enter them and are mathematically nearly impossible to reverse engineer. Simply put: without your password, your encrypted data may as well not exist. D1 synchronizes your encrypted journal entries with a remote server so you can access them across all your devices by simply changing your User ID in D1's settings. You can also choose to enable biometric authentication, which will take advantage of either Touch ID or Face ID sensors if available on your device to lock out local attackers as an added layer of security.
Screenshots
Verdict
The clearest difference is update cadence: ZDL at every 4 months against D1 Journal's every 54 months. D1 Journal's advantage is iOS requirement (12.4 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.
ZDL ships an update every 4 months, D1 Journal every 54 months. The most recent releases landed on June 1, 2026 and May 19, 2026 respectively.
| Parameter | ZDL | D1 Journal |
|---|---|---|
| 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 — better | Every 54 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 | 12.4 — better |
| Further details — not scored | ||
| Size | 23 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Blackwired Pte Ltd. | Ankush Girotra |
In-app purchases
ZDL
No in-app purchases
D1 Journal
No in-app purchases









