KING OF MATH vs R77Chat
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KING OF MATH
Master arithmetic operations like addition, subtraction, multiplication, and division with this engaging learning app. It features intuitive handwriting input and adaptive difficulty to suit all ages, making learning fun and effective.
- Addition practice
- Subtraction practice
- Multiplication practice
- Division practice
- Handwriting input
- Adaptive difficulty
- Reward system
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Learn and improve math and arithmetic (+ - × ÷) effectively & fast. Suitable for all ages. All math arithmetic operations (+ - × ÷) * Addition (+) * Subtraction (-) * Multiplication (× including small multiplication tables) * Division (÷) HIGHLIGHTS * Write naturally as on paper We have developed an intuitive handwriting input. * Increasing difficulty Tasks automatically adapt to the children's abilities. * Learning playfully The app motivates with great rewards and a bonus system. WHAT ELSE * No ads. * No personal data. * Fair and transparent. * Developed with teachers and educators.
R77Chat
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Unlock the Power of AI for Study and Learning! Elevate your learning experience with our AI-powered chat app, designed to help you succeed in your studies. Whether you’re a student, professional, or lifelong learner, this app is your go-to study companion! Key Features: - Ask Any Question: Get instant, accurate answers to your questions across a variety of subjects. - Text Summarization: Simplify complex topics and lengthy readings into concise summaries. - Practice Question Generator: Prepare effectively with custom practice questions tailored to your needs. - Essay Writing Assistant: Create structured, high-quality essays with guidance from AI. - Language Assistant: Improve your language skills with grammar tips, translations, and more.
Screenshots
Verdict
The clearest difference is in-app purchases: R77Chat at none against KING OF MATH's 5. R77Chat also leads on update cadence (monthly vs every 5 months). On price, ads, device support and iOS requirement 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. KING OF MATH sells 5 one-off in-app purchases. R77Chat asks for nothing beyond the download.
KING OF MATH ships an update every 5 months, R77Chat monthly. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.
| Parameter | KING OF MATH | R77Chat |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (1.3K ratings) — better | — |
| Positive reviews | 44.1% of reviews | — |
| Number of ratings | 1.3K — better | — |
| Update frequency | Every 5 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 102 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | wonderkind GmbH | seng Ee |
Bugs and requests
KING OF MATH
Reported bugs
3 issues- Doesn't recognize simple numbers like 4 and 9
- Accepts wrong answers as correct
- Slow response time on some devices
Requested features
4 requests- Allow keyboard input or numeric keypad
- Calibration option for handwriting recognition
- Difficulty levels for different age groups
- More advanced math operations like multiplication and division
R77Chat
Not enough reviews yet to summarise bugs or requests.
In-app purchases
KING OF MATH
- Subtraction Deck$1.99
- Large multiplication tables$1.99
- Small multiplication tables$1.99
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- Division$1.99
- Full Version Bundle$4.99
R77Chat
No in-app purchases
Questions
Is KING OF MATH free?
Is R77Chat free?
Do KING OF MATH or R77Chat have ads?
Which is updated more often, KING OF MATH or R77Chat?
Other comparisons
