Chalcack: Homework, unstuck.: iPhone vs Android
Chalcack: Homework, unstuck. by Dong Hae Jang is on both the App Store and Google Play. Here are both versions together: downloads, users, revenue, ratings and chart positions, store by store with totals.
Rating
4.7 ★
2.1k ratings, both stores
Measured
Best rank now
#5
iPhone · 
Education Free
Education FreeMeasured
App Store
App details
App ID
6747833381
Publisher
장동해
Publisher country
South Korea
Content rating
4+
Google Play
App details
App ID
com.andrewdhjang.chalcack
Publisher
장동해
Publisher country
South Korea
Content rating
Everyone
Chalcack: Homework, unstuck. downloads & installs
Both stores, worldwide. Bands are open; exact numbers are free with an account.
| Store | Downloads / day | Lifetime installs |
|---|---|---|
| iPhone | – | 100k+ |
| Google Play | – | 50k+ Measured |
| Total | – | 100k+ Confidence |
How this is calculated
iPhone: chart positions and rating growth per country, anchored on its own Android downloads; lifetime from ratings worldwide × installs per rating. Google Play: the daily change in its exact install count. The total adds every store.
Where Chalcack: Homework, unstuck.'s downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend before Apple and Google take their fee.
| Store | Per day | Per month | Share |
|---|---|---|---|
| App Store | |||
| Google Play | |||
| Total | Confidence | 100% |
Business model: In-app purchase-led
How Chalcack: Homework, unstuck. makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 2 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks now
Both stores, across every country we track.
Ratings
Both stores. Store data, measured.
| Store | Rating | Ratings |
|---|---|---|
| App Store | 4.7 ★ | 2.1k |
| Google Play | – | – |
| Both stores | 4.7 ★ weighted by ratings | 2.1k |
About Chalcack: Homework, unstuck.
Don't Just Study. Master It.
Stop hitting a wall every time you encounter a tough problem. Whether it’s a complex equation, a confusing passage, or a deep scientific concept, Chalcack is your 24/7 AI study companion and academic utility designed to turn every "I'm stuck" into an "I get it!"
Simply snap a photo and watch as Chalcack breaks down the most difficult problems into clear, logical, step-by-step instructions. We don’t just give you the answer—we give you the roadmap to boost your GPA and master the material yourself.
■ WHY CHALCACK?
• Snap and Solve: From advanced Calculus to complex English grammar and Science, our AI recognizes the problem instantly and provides the most accurate solution in seconds.
• AI-Powered Logic: No more guessing games. We walk you through the logical flow and "Deep Thinking" behind every problem so you understand the "how" and the "why."
• All-in-One Subject Support: Math, English, Physics, Chemistry, Biology, History, and more. Whatever the grade level or subject, Chalcack has you covered.
• Master the Core Concepts: We identify the underlying principles behind each question and highlight why specific answers are wrong, maximizing your learning efficiency.
• Personal Study Vault & Review: Automatically save your scanned questions. Build a personalized Review Library and digital flashcards to bridge knowledge gaps before the big exam.
■ COMPREHENSIVE SUBJECT COVERAGE
• Mathematics: Algebra (Real Numbers, Logarithms, Complex Numbers), Function (Linear, Quadratic, Polynomial), Geometry, Trigonometry, Calculus (Derivatives, Integrals, Limits), Statistics, and Matrix Algebra.
• Science: Physics, Chemistry, Biology, and Earth Science.
• Language & Humanities: Grammar, Reading Comprehension, Vocabulary, Literature, and History.
• Test Prep: Expert-level support for SAT, ACT, AP Exams, IB, and English proficiency tests.
■ THE ULTIMATE STUDY TOOLBOX
• AI Study Converter: Turn your photos and notes into structured study guides.
• 24/7 Availability: Get expert-level AI help anytime, anywhere—no need to wait for a private tutor.
• Clear Visuals: Experience problems explained with the clarity of a live whiteboard.
■ WHO IS CHALCACK FOR?
• Solo Students: Get an immediate unblock to keep your study flow going.
• Visual Learners: Those who find vague textbook answer keys confusing and need animated logic.
• Self-Starters: Students looking to master concepts and improve grades without the high cost of tutoring.
• Test-Takers: Fast, efficient review for difficult problems before high-stakes exams.
Stop wasting time flipping through answer keys. Regain your confidence and make learning efficient again. With Chalcack, the solution is always just a snap away.
Download Chalcack today and start studying smarter!
■ SUBSCRIPTION INFORMATION
• Plan: Chalcack PRO
• Duration: 1 Month (Auto-renewal)
• Price: $9.99/month (or local equivalent)
• Payment will be charged to your Apple ID account at confirmation of purchase.
• S
Stop hitting a wall every time you encounter a tough problem. Whether it’s a complex equation, a confusing passage, or a deep scientific concept, Chalcack is your 24/7 AI study companion and academic utility designed to turn every "I'm stuck" into an "I get it!"
Simply snap a photo and watch as Chalcack breaks down the most difficult problems into clear, logical, step-by-step instructions. We don’t just give you the answer—we give you the roadmap to boost your GPA and master the material yourself.
■ WHY CHALCACK?
• Snap and Solve: From advanced Calculus to complex English grammar and Science, our AI recognizes the problem instantly and provides the most accurate solution in seconds.
• AI-Powered Logic: No more guessing games. We walk you through the logical flow and "Deep Thinking" behind every problem so you understand the "how" and the "why."
• All-in-One Subject Support: Math, English, Physics, Chemistry, Biology, History, and more. Whatever the grade level or subject, Chalcack has you covered.
• Master the Core Concepts: We identify the underlying principles behind each question and highlight why specific answers are wrong, maximizing your learning efficiency.
• Personal Study Vault & Review: Automatically save your scanned questions. Build a personalized Review Library and digital flashcards to bridge knowledge gaps before the big exam.
■ COMPREHENSIVE SUBJECT COVERAGE
• Mathematics: Algebra (Real Numbers, Logarithms, Complex Numbers), Function (Linear, Quadratic, Polynomial), Geometry, Trigonometry, Calculus (Derivatives, Integrals, Limits), Statistics, and Matrix Algebra.
• Science: Physics, Chemistry, Biology, and Earth Science.
• Language & Humanities: Grammar, Reading Comprehension, Vocabulary, Literature, and History.
• Test Prep: Expert-level support for SAT, ACT, AP Exams, IB, and English proficiency tests.
■ THE ULTIMATE STUDY TOOLBOX
• AI Study Converter: Turn your photos and notes into structured study guides.
• 24/7 Availability: Get expert-level AI help anytime, anywhere—no need to wait for a private tutor.
• Clear Visuals: Experience problems explained with the clarity of a live whiteboard.
■ WHO IS CHALCACK FOR?
• Solo Students: Get an immediate unblock to keep your study flow going.
• Visual Learners: Those who find vague textbook answer keys confusing and need animated logic.
• Self-Starters: Students looking to master concepts and improve grades without the high cost of tutoring.
• Test-Takers: Fast, efficient review for difficult problems before high-stakes exams.
Stop wasting time flipping through answer keys. Regain your confidence and make learning efficient again. With Chalcack, the solution is always just a snap away.
Download Chalcack today and start studying smarter!
■ SUBSCRIPTION INFORMATION
• Plan: Chalcack PRO
• Duration: 1 Month (Auto-renewal)
• Price: $9.99/month (or local equivalent)
• Payment will be charged to your Apple ID account at confirmation of purchase.
• S