Comparison

RootWords vs CDR RDN

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Deconstruct words into root parts
  • Discover word meanings
  • Build new words from roots
  • Learn vocabulary for tests
  • Progress tracking
  • Daily streaks
Features
Read full description

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/

About

CDR RDN

Features
Read full description

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.

Screenshots

RootWords4 screens
CDR RDN4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

Scorecard3 real differences · 7 level
RootWords versus CDR RDN: the parameters behind the verdict, then further details
ParameterRootWordsCDR RDN
PriceFree — better$4.99
Rating4.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 2 months—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size38 MB12 MB
Age rating4+12+
DeveloperCharlotte O'ConnellBoukeri Madiha

In-app purchases

4 purchases

RootWords

Subscriptions4
  • Test and Audio$1.991 Month
  • Full Access$5.991 Month
  • Test and Audio$19.991 Year
Show 1 more
  • Full Access$59.991 Year
None

CDR RDN

No in-app purchases

Questions

Is RootWords free?
RootWords is free to download, with in-app purchases available.
Is CDR RDN free?
CDR RDN costs $4.99, with no in-app purchases.
Do RootWords or CDR RDN have ads?
Neither RootWords nor CDR RDN shows ads.

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