KDI CL vs Scratch Math!
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KDI CL
Access library services with a mobile ID, track seat availability, and reserve study rooms. This app helps users manage their library experience efficiently, including seat reservations and rental verification.
- Mobile ID for library access
- Book rental and seat reservation verification
- Real-time seat availability tracking
- Study room reservation
- Smart seat map and reservation system
- Seat usage history tracking
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This is an application for KDI · KDI School’s Central Library. This application is designed for KDI · KDI School Central Library users. The application provides services such as: v. Mobile ID (e-ID) - Verify users for library entrance - Verify users for book rentals and seat reservation v. Library Seat Status Tracker - Track status of available seats - Check seating arrangement of the library v. Study Room Reservation - Reserve study rooms for preferred period of time - Track status of available study rooms v. Smart Seat Map & Reservation System - Check and verify seat information - Check waiting list of seats with PC - Track history of seats used - Time extension for seating (available when connected to library Wi-Fi) - Return seats and cancel seat reservation *Internet should be connected at all times when using the application.
Scratch Math!
This app provides a hands-on approach to math practice, allowing users to solve problems directly on screen with a built-in scratchpad. It offers various practice activities for arithmetic and fractions, with visual tools and step-by-step explanations to aid understanding and track progress.
- Built-in digital scratchpad for problem-solving
- Visual fraction playground with animated models
- Step-by-step worked solutions with explanations
- Progress tracking for accuracy and streaks
- Offline-first functionality with local profiles
- Practice activities for addition, subtraction, multiplication, and division
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Scratch Math is a hands-on learning app built around how students actually solve math problems. Work through generated problems using a built-in scratch pad—just like working on paper, but without switching apps or losing focus. Practice arithmetic, explore fractions visually, and build algebra skills through interactive activities. Designed for repetition, clarity, visual learning, and confidence. PRACTICE ACTIVITIES Choose a practice card and begin a focused 10-question round. Every card includes a clear preview of the activity. - Addition - Subtraction - Multiplication - Long division - Fraction addition - Fraction subtraction - Fraction multiplication - Decimal practice - Mixed practice Decimal Practice combines addition, subtraction, multiplication, and division in every round. Choose Easy, Medium, or Hard, enter answers using the appropriate decimal separator, and open free technique-based hints when needed. SOLVE THE WAY YOU THINK - Built-in scratch work directly on each problem - Fullscreen scratch mode for more working space - Draw, carry, borrow, and cross out naturally - Pan, zoom, recenter, and clear your scratch work - Familiar worksheet-style problem layouts - Custom keypads for whole numbers, fractions, and decimals Scratch Math is not simply a calculator. It is a focused digital worksheet made for active practice. ALGEBRA PLAYGROUND Build algebra understanding through five interactive activities: - Balance Equations — keep both sides balanced while solving - Expression Tiles — group like terms and simplify expressions - Equation Stepper — choose valid steps and follow the equation - Function Machine — identify rules and complete input-output tables - Coordinate Graph — plot points and turn tables into graphs Algebra activities use generated 10-problem rounds, multiple difficulty levels, visual models, guided explanations, and progress tracking. VISUAL FRACTION PLAYGROUND Explore fractions in a separate hands-on area with animated activity cards and visual models. - Explore Fractions — connect fractions, decimals, and percentages - Fraction Bars — compare values and discover equivalents - Build Fraction — create the requested fraction - Fraction Detective — identify fractions shown by visual models - Equivalent Fractions — find values representing the same amount - Fraction Compare — choose less than, equal to, or greater than Scored fraction activities finish with a clear summary and options to continue practicing or return to the activity hub. LEARN STEP BY STEP - Earn credits by solving problems correctly - Spend credits to unlock complete worked solutions - Use free operation-specific hints during Decimal Practice - Replay explanations with clear, child-friendly steps - Review every answer after each Practice round - See correct, incorrect, and assisted results separately PROGRESS THAT MATTERS - Track solved problems, accuracy, streaks, and perfect rounds - Follow progress across individual Practice modes - Record progress for Fraction and Algebra activities - Unlock badges as skills improve - Earn dedicated Decimal, Fraction, and Algebra badges - See newly earned badges at the end of supported rounds - Keep separate progress for up to four local learner profiles BUILT FOR FOCUS - Offline-first learning - No account required - Progress stored locally on your device - Reduced Motion support - Responsive layouts for phones and tablets - Language selection for English, Spanish, French, Thai, and Arabic Scratch Math helps students practice, understand, and improve—one problem, one step, and one round at a time.
Screenshots
Verdict
The clearest difference is in-app purchases: KDI CL at none against Scratch Math!'s 3. Scratch Math!'s advantage is update cadence (every 3 days vs every 6 weeks) and ratings volume (3 vs 1). On price, rating, review sentiment and ads 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. Scratch Math! sells 3 one-off in-app purchases. KDI CL asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for KDI CL against 5.0 for Scratch Math!. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
KDI CL ships an update every 6 weeks, Scratch Math! every 3 days. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.
| Parameter | KDI CL | Scratch Math! |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (3 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 6 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 32 MB | 23 MB |
| Age rating | 9+ | 4+ |
| Developer | ido-it Co. Ltd. | Mathias Bakken |
Customer experience
KDI CL
Scratch Math!
In-app purchases
KDI CL
No in-app purchases
Scratch Math!
- Buy Me a Coffee$4.99
- Buy Me a Coffee$14.99
- Buy Me a Coffee$39.99









