Comparison

Grammar box vs Sky ENG

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

Head to head
About

Grammar box

Features
Read full description

Grammar box is a game where people can learn while playing the game. Swipe letters from left-right or right-left or diagonal to form words and identify the letters and words in the sentences.

About

Sky ENG

Features
Read full description

Sky ENG: Play Word Games. Have fun whilst Learning English with Exam-Style Accuracy. Sky ENG is the ultimate English word game that doubles as your personal speaking coach. Use fun, interactive challenges (like roleplay, reading, and listening comprehension) to boost your vocabulary, then get advanced, on-device speech analysis—the same style of audio evaluation used in major English exams like IELTS, TOEFL, PTE, CELPIP, and Business English assessments. Just speak naturally while playing, and Sky ENG instantly listens, evaluates, and replies like a real tutor. Perfect for daily fun, interview prep, or serious exam preparation—all 100% free, with no subscriptions and no locked features. Word Game Practice & Real-Time Coaching • Play & Practice: Engage in 20+ Word Game and roleplay scenarios, seamlessly combining fun challenges with serious fluency training. • Conversation & Feedback Modes: Chat freely or get instant, teacher-style grammar and vocabulary corrections while you play. • Exam Mechanics: Practice is designed around the 3-turn format of real speaking tests for high-impact learning. • Smart Mic Analysis: The app analyzes your actual audio—not just your words—to track pauses, clarity, pace, pronunciation, and fluency. Objective Speech Analytics (Real Audio Metrics) Get immediate, objective insights after every session. This is not a generic chatbot—your real audio is measured and scored using techniques similar to professional speaking tests: • Pronunciation Score • Clarity Score • Speech Pace & WPM (Words-per-Minute) • Pause Count & Duration • Fluency Score • Detailed Feedback on vocabulary, grammar, and sentence structure. Transcript Vault – Your Personal English Logbook Every word game session is saved as a detailed transcript for review and progress tracking: • Full conversation history with audio metrics. • One-tap translation to any language. • Word definitions and pronunciation playback. Super Fast. Private. 100% Free. • On-Device AI: Sky ENG runs directly on your iPhone for instant replies with no waiting, even offline after initial setup. • 100% Private: All your sessions stay on your device. We do not collect personal data or store your information in the cloud. • Free Forever: Every feature is fully unlocked. The app contains only two quick reward ads to keep it completely free for learners worldwide. Who Is Sky ENG For? • Gamified Learners who want fun, interactive ways to practice. • IELTS / TOEFL / PTE / CELPIP candidates. • Students, working professionals, and business English learners. • Anyone who wants a real English tutor—without paying a cent. Download now and start your English fluency journey!

Screenshots

Grammar box4 screens
Sky ENG4 screens

Verdict

The call

The clearest difference is ads: Grammar box at none against Sky ENG's shown. Grammar box also leads on update cadence (daily vs every 4 days) and device support (3 vs 1). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Grammar box ships an update daily, Sky ENG every 4 days. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 2 level
Grammar box versus Sky ENG: the parameters behind the verdict, then further details
ParameterGrammar boxSky ENG
PriceFreeFree
Update frequencyDaily — betterEvery 4 days
AdsNo — betterYes
In-app purchasesNoNo
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS11.0 — better26.0
Further details — not scored
Size32 MB2.1 GB
Age rating4+4+
DeveloperBelieve Creative ITES Pvt LtdReroy Panday

In-app purchases

None

Grammar box

No in-app purchases

None

Sky ENG

No in-app purchases

Questions

Is Grammar box free?
Grammar box is free to download, with no in-app purchases.
Is Sky ENG free?
Sky ENG is free to download, with no in-app purchases.
Do Grammar box or Sky ENG have ads?
Sky ENG shows ads; Grammar box does not.
Which is updated more often, Grammar box or Sky ENG?
Grammar box ships an update daily, and Sky ENG every 4 days. Most recently, Grammar box was updated on October 13, 2026 and Sky ENG on October 25, 2026.

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