RootWords vs CDR RDN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RootWords
Learn vocabulary by deconstructing words into their root parts. Discover meanings, build new words, and improve your understanding of English. Ideal for students and English language learners.
- Deconstruct words into root parts
- Discover word meanings
- Build new words from roots
- Learn vocabulary for tests
- Progress tracking
- Daily streaks
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RootWords - Root, not Rote! Choose a root, spin as many words as you can, and show you know their meaning. Don't know the word? Tap the parts (morpheme, not morphine!). Each part has a meaning and will help you learn the word. The more you play, the fewer times you will need to tap the parts. Great for the 5th and 6th grade vocab cliff, and helpful for English language learners and students working on vocabulary for tests. Free: Learn mode, every word. Test and Audio ($1.99 per month or $19.99 per year): hear every word and test yourself. Full Access ($5.99 per month or $59.99 per year): all games, Daily Streak, Custom List, and progress tracking. Subscriptions renew automatically unless canceled at least 24 hours before the end of the period. Manage or cancel in your App Store account settings. Log in with the same account on the web and your plan unlocks automatically. RootWords offers subscriptions, which are subject to this terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
CDR RDN
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Registered Dietitian Exam Mastery Study Smarter. Become an RD with Confidence. Transform your exam preparation with a powerful, innovative app built specifically for future Registered Dietitians. Whether you're studying for the RDN exam, reviewing key nutrition concepts, or mastering the Nutrition Care Process, this app makes learning simple, engaging, and effective. Perfect for dietetic students, interns, and professionals aiming to pass the RD exam on the first try. Key Features Comprehensive Content Access expertly curated practice questions, flashcards, key terms, and detailed explanations covering all CDR exam domains, including: Principles of Dietetics Nutrition Care Process (NCP) Screening & Assessment Planning & Intervention (MNT) Foodservice Systems Management & Research Applications Multiple Study Modes Learn your way with: Smart quizzes Flashcards Full mock exams Learn Anytime, Anywhere Study at your own pace — on the go, during internship hours, between classes, or from home. Interactive & Engaging Learning Stay motivated with dynamic tools that break down complex nutrition science into clear, easy-to-remember concepts. Track Your Progress Monitor your improvement with performance analytics. Identify weak areas instantly and build a customized study strategy. Perfect For Dietetic students preparing for the RDN/RD exam Dietetic interns reviewing core competencies Nutrition and health science learners Anyone wanting a complete, organized approach to studying nutrition Your Success, Simplified Don’t just study harder — study smarter. Our learners consistently build strong clinical reasoning, master evidence-based dietetics, and gain the confidence needed to pass the RDN exam and excel in professional practice. Start today. Learn smarter. Become a Registered Dietitian.
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Verdict
The clearest difference is price: RootWords at Free against CDR RDN's $4.99. CDR RDN's advantage is in-app purchases (none vs 4) and iOS requirement (13.0 vs 15.1). On 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
RootWords is free to download; CDR RDN costs $4.99 up front. RootWords sells 4 in-app purchases, starting at $1.99 per month. CDR RDN asks for nothing beyond the download.
| Parameter | RootWords | CDR RDN |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 4.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 months | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 38 MB | 12 MB |
| Age rating | 4+ | 12+ |
| Developer | Charlotte O'Connell | Boukeri Madiha |
In-app purchases
RootWords
- Test and Audio$1.991 Month
- Full Access$5.991 Month
- Test and Audio$19.991 Year
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- Full Access$59.991 Year
CDR RDN
No in-app purchases
Questions
Is RootWords free?
Is CDR RDN free?
Do RootWords or CDR RDN have ads?
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