Comparison

Piece Word vs CastMind

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

Head to head
About

Piece Word

Features
Read full description

Piece Word Your Pet Companion for Fun & Effective English Learning Tired of boring vocabulary lists and hard-to-stick-with study plans? Welcome to Piece Word – a language learning playground that perfectly blends level-based lessons, smart contextual translation, and a heartwarming pet-raising experience. Here, every study session is filled with warmth, and every day of persistence is gently rewarded. 【 Level Up Systematically, Build a Solid Foundation】 From "Beginner" to "Advanced," we've designed a clear learning path for you. Master vocabulary with detailed explanations, example sentences, and related words, building your English proficiency step-by-step, just like stacking blocks. 【Block English: Level Up Your English with Your Pet Companion】 Tired of vague learning goals and losing motivation? Meet Block English, where mastering English becomes a clear, engaging, and heartwarming adventure. We combine level-based challenges, smart contextual learning, and a cute pet-raising experience to transform your study plan into a rewarding journey you’ll look forward to every day. 【Smart Translation, Unlock Authentic Expression】 Stumped by Chinese phrases like "Shopping is a moment of pleasure, but at the end of the month, you'll be in tears"? Our smart translator captures both meaning and nuance. Switch between styles like "Standard," "Chill," and "Savage"to find the most authentic and expressive English equivalent. 【Cute Pet Motivation: Learn with Love & Anticipation】 Adopt your exclusive study buddy, Mochi!​Earn "Happiness" points by completing lessons, then feed and play with your pet. Its growth (e.g., reaching Lv.2, 30% Happiness) and global ranking (like TOP 65.5%!) are a direct reflection of your learning journey. Studying becomes a warm, shared adventure. 【Progress Tracking: See Your Improvement Clearly】 Your efforts deserve clear recognition. Your profile shows your "Day Streak" and total "Words Learned," and a check-in calendar visualizes your consistent progress. Every day you persist is a victory. 【Fun Quizzes: Reinforce Knowledge Playfully】 Test yourself with quick quizzes on vocabulary and culture (e.g., "What is 'Wanderlust'?"). Stuck? Use the hint feature! Solidify your knowledge through interactive challenges that make learning fun. 【Why Choose Piece Word ?】 We believe the best learning comes from passion, habit, and a sense of achievement. Piece Word combines gamified, heartwarming engagement with a scientific learning method, creating an environment that is fun, caring, and effective. Here, you're not just memorizing words—you're building bridges to a wider world while nurturing a cherished companion. Download Piece Word today and start your joyful language-building journey with a furry friend by your side! 【内购说明】 大陆会员套餐: 1、周卡订阅: 价格:¥9.8 订阅周期:周 2、永久会员: 价格:¥288 周期:一次性扣费,终身使用功能 3、月卡订阅: 价格:¥28.8 订阅周期:月 4、年度会员: 价格:¥99.8 订阅周期:年 Overseas Membership Package: 1. Weekly Member: Price: $9.9 Subscription period: Weekly 2. Monthly Membership: Price: $14.9 Subscription Period: Monthly 3. Annual Membership: Price: $99 Subscription Period: Year 【关于自动续订和付款】 1、付款:用户确认购买并付款后计入iTunes账户 2、自动续费:苹果iTunes账户会在到期前24小时内扣费,扣费成功后订阅顺延一个订阅周期 3、关闭服务:您可以在苹果手机”设置”-->进入”iTunes Store与App Store”—>点击”Apple ID”,选择”查看Apple ID”,进入”账户设置”页面,点击”订阅”,管理自动续费服务,如需取消,每个计费周期结束前24小时关闭服务即可,到期前24小时内则不再扣费。 【协议】 1、服务协议:https://jimuen.kelezuan.com/useragreement 2、隐私协议:https://jimuen.kelezuan.com/privacypolicy

About

CastMind

Features
Read full description

Want to understand someone? CastMind gathers their interviews from wherever they are, so you can follow them and publish what you took away. To understand Karpathy today, you dig through Lex for one episode, Dwarkesh for another, and YouTube for his own long videos. Podcast apps can't help — they subscribe by show, so search gives you shows, not the episode he was on. CastMind works by person. — What it does for you — · Gather one person Tap + on Listen and search podcast episodes, Bilibili, and YouTube by name. Select a batch, keep them in one collection, and put them in your own order. The collection is pinned to Deep Dive on Home. · Tap a line to understand it When an English interview has a transcript, tap a line to understand it on the spot, or turn on bilingual view. If the show publishes its own transcript, it's fetched when you open the episode; YouTube and Bilibili can pull platform subtitles. · A transcript even when there isn't one Download a podcast episode and make a transcript on this iPhone. Audio never leaves the device. I ran a 3-hour-32-minute Chinese interview (210 MB) on iPhone 15 Pro Max — about 6 minutes to a full draft. It's machine dictation, so expect typos; the bar stays labeled unproofread. · Traces that leave themselves Mark a moment from the lock screen, Control Center, Siri, or your headphones without opening the app. Lines you tapped and moments you marked land in the same place. · Write a teardown you'll sign What you marked is laid out in the episode's teardown. You only write your own take. One Markdown file per episode, ready for X or your blog. · Pick up where you left off Open and continue from your last position. Each show remembers its speed; Smart Speed skips silences and Voice Boost lifts voices. Bind shows you follow to a smart collection and new episodes land there automatically. · On runs, commutes, and in the car Lock screen, Control Center, and headphone controls are ready. In the car, open CastMind on CarPlay to continue a podcast, open a show, or play a collection. · Offline first Original text, marks, and notes are readable and editable offline. No account. Nothing uploaded to the cloud. — What we deliberately don't do — No recommendation feed, charts, or people directory — you search for the person you already care about; we won't scroll content at you. No pronunciation scoring, no flashcards, and AI never writes your take for you. castmind.ai is CastMind's website.

Screenshots

Piece Word4 screens
CastMind4 screens

Verdict

The call

The clearest difference is price: Piece Word at Free against CastMind's $5.99. Piece Word also leads on iOS requirement (13.0 vs 17.0). CastMind's advantage is in-app purchases (none vs 7) and update cadence (every 2 weeks vs every 3 weeks). 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

Piece Word is free to download; CastMind costs $5.99 up front. Piece Word sells 7 in-app purchases, starting at $0.99 per 7 days. CastMind asks for nothing beyond the download.

UpkeepUpdate frequency

Piece Word ships an update every 3 weeks, CastMind every 2 weeks. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 2 level
Piece Word versus CastMind: the parameters behind the verdict, then further details
ParameterPiece WordCastMind
PriceFree — better$5.99
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPod — betteriPhone
Requires iOS13.0 — better17.0
Further details — not scored
Size4 MB15 MB
Age rating4+17+
Developer剑桥 杨文 杨

In-app purchases

7 purchases

Piece Word

Subscriptions6
  • 周卡订阅$0.997 Days
  • 月卡订阅$3.991 Month
  • Weekly Member$9.907 Days
Show 3 more
  • Monthly Membership$14.901 Month
  • 年会员$14.991 Year
  • Annual Membership$99.001 Year
One-time1
  • 永久会员$39.99
None

CastMind

No in-app purchases

Questions

Is Piece Word free?
Piece Word is free to download, with in-app purchases available.
Is CastMind free?
CastMind costs $5.99, with no in-app purchases.
Do Piece Word or CastMind have ads?
Neither Piece Word nor CastMind shows ads.
Which is updated more often, Piece Word or CastMind?
Piece Word ships an update every 3 weeks, and CastMind every 2 weeks. Most recently, Piece Word was updated on October 25, 2026 and CastMind on October 31, 2026.

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