Know Virtual Production vs Retain
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Know Virtual Production
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Target3D presents the Virtual Production Masterclass. Welcome to the app that will help you embed the learning from the course. By using the app regularly, testing yourself and progressing, you will graduate to become a grand master of Virtual Production.
Retain
This minimalist flashcard app uses AI to help you create and study. Its intelligent spaced repetition algorithm optimizes review intervals for efficient learning and rapid progress. Choose from different card layouts to keep your study sessions engaging.
- AI-generated flashcards
- Customizable card layouts
- Spaced repetition algorithm
- Minimalist design
- Progress tracking
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A beautifully minimalist flashcard app designed with simplicity and efficiency in mind. Create your own flashcards, or let AI generate them for you. Choose between two different card layouts that keep your learning fresh and engaging. And with our intelligent spaced repetition algorithm, you'll review your cards at optimal intervals, ensuring maximum retention and rapid progress.
Screenshots
Verdict
The clearest difference is in-app purchases: Know Virtual Production at none against Retain's 2. Know Virtual Production also leads on iOS requirement (13.2 vs 15.1). On price, update cadence, 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. Retain sells 2 in-app purchases, starting at $4.99 per month. Know Virtual Production asks for nothing beyond the download.
Know Virtual Production ships an update fortnightly, Retain every 3 weeks. The most recent releases landed on November 26, 2025 and October 6, 2026 respectively.
| Parameter | Know Virtual Production | Retain |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | — | 88.9% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Fortnightly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.2 — better | 15.1 |
| Further details — not scored | ||
| Size | 38 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Feed Your Elephant Limited | Paul Evans |
In-app purchases
Know Virtual Production
No in-app purchases
Retain
- Premium Monthly$4.991 Month
- Premium Yearly$29.991 Year
