RootWords vs ThirtyB
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/
ThirtyB
Prepare for standardized tests with engaging vocabulary challenges. This app offers multiple-choice questions, adaptive learning, and spaced repetition to help you master over 3,000 words. Track your progress, compete on leaderboards, and enjoy a focused learning experience.
- Standardized test format questions
- Adaptive learning and spaced repetition
- Over 3,000 vocabulary words
- Multiple game modes
- Leaderboards and progress tracking
- Handwriting bonus boosters
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Modeled after U.S. standardized test formats, it challenges users with synonym-based multiple-choice questions across five unique modes. Each day, players get 30 minutes to earn points, climb leaderboards, and master over 3,000 words using adaptive learning, spaced repetition, and instant feedback. With analytics, social accountability, and handwriting-powered bonus boosters, ThirtyB makes deep learning fast, focused, and fun. Terms of Use: https://30b.ai/?page_id=71 Privacy Policy: https://30b.ai/?page_id=3#
Screenshots
Verdict
The clearest difference is rating: ThirtyB at 5.0 against RootWords's 4.0. RootWords's advantage is iOS requirement (15.1 vs 18.2). On price, review sentiment, ratings volume and update cadence 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. RootWords sells 4 in-app purchases, starting at $1.99 per month and ThirtyB sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.
ThirtyB holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
RootWords ships an update every 2 months, ThirtyB monthly. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.
| Parameter | RootWords | ThirtyB |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 4 — better | 3 |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 18.2 |
| Further details — not scored | ||
| Size | 38 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Charlotte O'Connell | The Tasma Group, LLC |
Customer experience
RootWords
ThirtyB
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
ThirtyB
- Monthly Premium Plan$5.991 Month
- Yearly Premium Plan$59.991 Year
Questions
Is RootWords free?
Is ThirtyB free?
Which has better reviews, RootWords or ThirtyB?
Do RootWords or ThirtyB have ads?
Which is updated more often, RootWords or ThirtyB?
Other comparisons
