Comparison

LeetCards vs Krayon Box

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

Head to head
About

LeetCards

Master coding interview questions with spaced repetition and curated problem sets. Track your progress, take custom notes, and compete on leaderboards to optimize your learning and land your dream job.

Highlights
  • Spaced repetition for DSA concepts
  • Curated problem sets (Grind 75, Blind 75)
  • Progress tracking (streaks, XP)
  • Custom notes for problems
  • Leaderboard for competition
Features
Read full description

LeetCards is the ultimate tool for mastering Leetcode questions through efficient and effective study techniques. Our app utilizes spaced repetition to help you learn new data structures and algorithms (DSA) concepts every day. Whether you are a beginner or an advanced coder, LeetCards is designed to optimize your learning process, ensuring you spend the right amount of time on each problem. Features: - Spaced Repetition: Learn and retain DSA concepts effectively with our scientifically-backed study method. - Curated Problem Sets: Access popular problem sets like Grind 75, Blind 75, and Neet 150. - Progress Tracking: Monitor your study streaks, cards studied, and XP gained. - Custom Notes: Create and save your own notes for each problem to aid your understanding. - Leaderboard: Compete with peers and track your ranking. Subscription/In-App Purchase Information: Title: LeetCards Pro Length of Membership: Lifetime, Monthly, Yearly Price: $89/lifetime, $59/year, $9/month Benefits: Unlock all premium problem sets, Unlimited note-taking, Progress tracking Privacy Policy: https://leetcards.com/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Ace your coding interviews and land your dream job with LeetCards. Download now and start your journey to becoming a coding expert!

About

Krayon Box

Features
Read full description

Krayon Box application allows parents to communicate with their child's teachers and school authorities through a digital diary that offers various communication features, including the ability to share messages, files, images, and videos. This app facilitates easy chatting between parents and teachers, whether it's for formal schools, tuition classes, or hobby classes for children. With Krayon Box, schools can effortlessly connect with parents of an entire class or individual parents with just a single click. This app enables image sharing, attendance taking, and engagement creation, making it a convenient tool for schools to communicate with parents. Krayon Box has features like- Easy communication between teachers and parents Daily updates on the child's activities Sharing of images and videos of the child Digital diary for parents to connect with teachers and school authorities Fee payment reminders and status updates Direct messaging with teachers for query resolution Sharing of study materials and assignments Digital record-keeping for fees and payments Seamless communication with teachers Real-time updates on attendance and leaves Key benefits to the Parents include: 1. Quick Chat with teachers and easy access to school 2. Attendance absence notification 3. Daily activity notifications 4. Share images, videos and files to any other app/email also. 6. Monthly Planner and Events 7. Manage all children in a single app Key benefits to the Schools include: 1. Brand building and High NPS 2. Reduced Costs and High Efficiency 3. Organised staff 4. Can be used for internal staff communication 5. Lesser phone calls from parents Parents & Students mutually benefit from Krayon Box mobile app as it allows them to: 1. Stay connected anywhere, anytime 2. Get all info about institute in one place 3. See info for more than one child in same app 4. Ask queries to institute 5. Pay institute & activity fees online How it works? To stay connected with the school, your mobile number becomes your unique identifier. Therefore, it's crucial for the school to have your correct mobile number. To connect with the school, the parent downloads the app and registers using the Login ID provided by school on your mobile no. If you face any issues connecting, it may indicate that the school is not on our platform or that the school does not have your mobile number.

Screenshots

LeetCards4 screens
Krayon Box4 screens

Verdict

The call

The clearest difference is in-app purchases: Krayon Box at none against LeetCards's 3. LeetCards's advantage is update cadence (every 3 weeks vs every 2 months) and iOS requirement (13.4 vs 15.5). On price, 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

Both are free to download. LeetCards sells 3 in-app purchases, starting at $9.00 per month. Krayon Box asks for nothing beyond the download.

UpkeepUpdate frequency

LeetCards ships an update every 3 weeks, Krayon Box every 2 months. The most recent releases landed on October 11, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 6 level
LeetCards versus Krayon Box: the parameters behind the verdict, then further details
ParameterLeetCardsKrayon Box
PriceFreeFree
Rating1.0 (4 ratings) — better—
Number of ratings4 — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.4 — better15.5
Further details — not scored
Size41 MB116 MB
Age rating4+4+
DeveloperKittichote KamalapiratAlok .

In-app purchases

3 purchases

LeetCards

Subscriptions2
  • LeetCards$9.001 Month
  • LeetCards$59.001 Year
One-time1
  • LeetCards$89.00
None

Krayon Box

No in-app purchases

Questions

Is LeetCards free?
LeetCards is free to download, with in-app purchases available.
Is Krayon Box free?
Krayon Box is free to download, with no in-app purchases.
Do LeetCards or Krayon Box have ads?
Neither LeetCards nor Krayon Box shows ads.
Which is updated more often, LeetCards or Krayon Box?
LeetCards ships an update every 3 weeks, and Krayon Box every 2 months. Most recently, LeetCards was updated on October 11, 2026 and Krayon Box on October 3, 2026.

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