Ludus vs Interact
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ludus
This app helps you learn new languages faster by automatically creating study decks from pre-loaded dictionaries. It uses a smart spaced repetition system to schedule reviews right before you forget words, ensuring efficient learning and better long-term memory retention.
- Pre-loaded dictionaries
- Automatic daily review decks
- Spaced Repetition Scheduler (FSRS)
- Word definitions and grammar info
- AI Sentence Generator
- AI Scan Tool
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Stop wasting time making flashcards manually. Ludus comes with pre-loaded dictionaries, so you can search any word, save it instantly, and it automatically becomes part of your daily study deck. Ludus uses Free Spaced Repetition Scheduler (FSRS), a modern spaced repetition system that builds a unique forgetting curve for every word, so you review vocabulary right before you're likely to forget it. That means fewer wasted reps, faster progress, and stronger long-term memory. Whether you're learning French, Spanish, or building vocabulary for school, Ludus helps you study consistently and retain more with less effort. FREE FEATURES: - Pre-loaded dictionaries (no manual flashcard creation) - Instant word saving with automatic daily review deck - FSRS-based spaced repetition for smarter scheduling - Word definitions, grammar info, and example usage - Clean, fast studying built for real learning PAID FEATURES (Academic Weapon subscription): - All Languages Unlocked - Unlimited Saved Lists Coming soon: Games, skins. SUBSCRIPTION INFORMATION Ludus offers an auto-renewable subscription to unlock all premium features: ACADEMIC WEAPON PLAN: - Monthly: $6.99/month FREE PLAN: - Limited access to features - Upgrade anytime to unlock full access SUBSCRIPTION TERMS: - Payment charged to Apple ID at purchase confirmation - Subscription automatically renews unless canceled at least 24 hours before the end of the current period - Manage subscriptions in iPhone Settings > [Your Name] > Subscriptions - No refunds for unused portions of subscription LEGAL DOCUMENTS: Terms of Use (EULA): https://ludusapp.com/terms Privacy Policy: https://ludusapp.com/privacy-policy For support, contact: admin@ludusapp.com
Interact
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Interact is an educational app for turning the things you want to learn into interactive lessons. Bring all your favorite notes, links, and videos; and turn those into interactives. It's quick and easy to play through flashcards, quizzes, and other types of lessons. The spaced repetition system is built-in so you actually remember what you learn. The idea is to take the things you're already reading, watching, and studying and turn them into something you'll still know months from now. • Create lessons from notes, links, videos, PDFs, photos, and audio • Study with flashcards, fill-in-the-blank, and quizzes • Review on a spaced repetition schedule that adapts as you learn • Track your progress across subjects • Continue on the web and your account stays in sync • Share subjects with friends Spaced repetition has been around a long time, but it usually means building all your flashcards by hand. Interact does that part for you, so you can spend your time learning instead of making cards. It's useful whether you're studying for something specific, picking up a new skill, or just trying to hold on to what you read. Interact is free for creating and playing interactives, with a monthly limit on AI-generated lessons. Interact Premium unlocks more capacity and features, available as a monthly or yearly subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula Interact Terms of Service: https://interact.school/terms Privacy Policy: https://interact.school/privacy
Screenshots
Verdict
The clearest difference is update cadence: Ludus at every 5 days against Interact's fortnightly. Ludus also leads on iOS requirement (16.4 vs 26.0). Interact's advantage is device support (4 vs 1). On price, 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. Ludus sells 2 in-app purchases, starting at $7.99 per month and Interact sells 2 in-app purchases, starting at $12.49 per month. Whichever you choose, the download price is not the number that matters.
Ludus ships an update every 5 days, Interact fortnightly. The most recent releases landed on October 3, 2026 and September 24, 2026 respectively.
| Parameter | Ludus | Interact |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (17 ratings) — better | — |
| Positive reviews | 86.7% of reviews | — |
| Number of ratings | 17 — better | — |
| Update frequency | Every 5 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone | iPhone, iPad, Apple TV, Apple Watch — better |
| Requires iOS | 16.4 — better | 26.0 |
| Further details — not scored | ||
| Size | 166 MB | 31 MB |
| Age rating | 4+ | 12+ |
| Developer | Ludus-Language, Inc. | Bijan Boustani |
In-app purchases
Ludus
- Academic Weapon$7.991 Month
- Annual Subscription7 Days trial$59.991 Year
Interact
- Premium Monthly7 Days trial$12.491 Month
- Premium Annual7 Days trial$99.001 Year









