i vs VDex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
i
This app helps aspiring and experienced iOS developers understand and master the fundamental components of iOS development. It provides an intuitive tree view to visualize relationships between components and fosters a community for sharing insights and troubleshooting.
- Intuitive tree view of iOS components
- Deepen understanding of component relationships
- Community insights and troubleshooting
- Reference for junior and senior iOS developers
- Learn iOS programming fundamentals
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You are passionate about technology, you want to be an iOS programmer. Where do you have to start? Who will lead you? Just as we go to school, professors or even natural geniuses, we need to start from the alphabet. So in iOS, the "Component" is same as alphabets collection. After we have mastered the letters, we can match the words into complete sentences. You are an iOS junior developer, or even a senior, Are you confident that you know everything, and understand all the components of iOS? We will help you to deepen the relationship between the components, through a tree view, you will have a more intuitive view of them! Have you ever encountered errors when using the iOS component, many people have encountered just like you. Share your insights for everyone to use the component properly, for a strong iOS community.
VDex
Access and search a comprehensive database of cybersecurity vulnerabilities. Stay updated with the latest CVEs, synced hourly from NIST. A subscription is required for full access, with a free trial available.
- CVE database access
- Hourly NIST sync
- Search CVE by ID
- Monthly subscription
- Annual subscription with trial
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VDex is a vulnerability reference tool with data sourced from the NIST National Vulnerability Database. With VDex you can quickly and easily see the latest CVEs and lookup any CVE by ID. While NIST updates their feeds approximately every 2 hours, VDex syncs with NIST every hour to ensure data is up to date. Note: a subscription is required to fetch CVEs via VDex. You can purchase a monthly or annual subscription in the app. A free 1 week trial is included with the annual subscription.
Screenshots
Verdict
The clearest difference is in-app purchases: i at none against VDex's 2. i also leads on update cadence (every 10 days vs every 4 months) and iOS requirement (8.0 vs 12.0). On price, ads 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. VDex sells 2 in-app purchases, starting at $4.99 per month. i asks for nothing beyond the download.
i ships an update every 10 days, VDex every 4 months. Both last shipped on June 1, 2026.
| Parameter | i | VDex |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 2 — better |
| Update frequency | Every 10 days — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 33 MB | 39 MB |
| Age rating | 17+ | 4+ |
| Developer | Nguyen Tuan Anh | Steven Nguyen |
Customer experience
i
VDex
In-app purchases
i
No in-app purchases
VDex
- CVE Access$4.991 Month
- CVE Access7 Days trial$49.991 Year
