Comparison

Abacus Mental Math Training vs R77Chat

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

Head to head
About

Abacus Mental Math Training

This app offers professional training and assessment for abacus mental calculation and flash calculation, adhering to international grading standards. It features challenge and custom modes to help users improve their math and speed calculation skills.

Highlights
  • Adheres to World Abacus Mental Calculation Federation standards
  • Challenge Mode with 10 levels and 200 stages
  • Custom Mode for Flash Calculation and Abacus practice
  • Adjustable calculation parameters (number range, digits, time)
  • Gradual difficulty progression
  • Simulates exam conditions
Features
Read full description

"Abacus Mental Calculation - Grade Assessment for Mental Math and Flash Anzan", a professional training and exam tool is a specialized application designed strictly in accordance with the "World Abacus Mental Calculation Federation Abacus Mental Calculation Grade Assessment Standard." It features professional grading, rich content, ease of use, and an educational and entertaining experience. It is an essential training and exam tool for mathematics enthusiasts and flash calculation enthusiasts. The application is divided into two main modes: Challenge Mode and Custom Mode. The Challenge Mode consists of 10 levels and 200 stages, corresponding to the proficiency and ability assessment standards of Abacus Mental Calculation from Level 10 to Level 1. The difficulty of each stage progresses gradually, and the exam stages of each major level strictly adhere to the question paper standards of the "Abacus Mental Calculation Grade Assessment Standard." This allows examinees and speed calculation enthusiasts to receive comprehensive Abacus Mental Calculation training and assess their own mental calculation skills. Level 5 of Abacus Mental Calculation corresponds to the corresponding level of the Computerized Accounting Certificate in the Certified Public Accountant examination, providing relevant individuals with ample practice opportunities. In the Abacus Mental Calculation examination and assessment standards, Levels 8-10 only involve addition and subtraction, while Levels 1-7 also include multiplication and division. The exam settings, difficulty, time limit, number of questions, and question types in this application fully comply with the corresponding exam standards. If students can successfully pass the corresponding level exam in this application, they can be considered to possess the equivalent qualification of Abacus Mental Calculation and can confidently participate in the grade assessment exam. The Custom Mode includes Flash Calculation and Abacus Mental Calculation functions. In Flash Calculation, users can select calculation methods, number range, number of digits, and time intervals. In Abacus Mental Calculation, users can customize calculation methods, number of questions, and time limit, thereby improving their mathematical and mental calculation skills through extensive and repetitive training. Our Abacus Mental Calculation and Flash Anzan application has a fresh and concise interface, natural and friendly interactions, and provides a user-friendly experience. It can quickly help mathematics enthusiasts improve their Abacus Mental Calculation performance and mathematical calculation skills. It is suitable for students of all levels, various abacus calculation, speed calculation, and mental calculation enthusiasts, as well as individuals preparing for Abacus Mental Calculation grade assessment and computerized accounting examinations. Our goal has always been to create a professional Abacus Mental Calculation and Flash Calculation application. We sincerely hope that this application can enhance your mental calculation ability, cognitive skills, and mathematical proficiency, and help you successfully pass the grade assessment exam!

About

R77Chat

Features
Read full description

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

Abacus Mental Math Training4 screens
R77Chat4 screens

Verdict

The call

The clearest difference is in-app purchases: R77Chat at none against Abacus Mental Math Training's 1. R77Chat also leads on ads (none vs shown). Abacus Mental Math Training's advantage is iOS requirement (10.0 vs 12.0). On price, update cadence 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. Abacus Mental Math Training sells 1 one-off in-app purchase. R77Chat asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 11, 2026 and October 4, 2026 respectively.

Scorecard3 real differences · 7 level
Abacus Mental Math Training versus R77Chat: the parameters behind the verdict, then further details
ParameterAbacus Mental Math TrainingR77Chat
PriceFreeFree
Rating4.1 (31 ratings) — better—
Positive reviews20.0% of reviews—
Number of ratings31 — better—
Update frequencyMonthlyMonthly
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS10.0 — better12.0
Further details — not scored
Size34 MB29 MB
Age rating4+4+
DeveloperPeikun Duanseng Ee

In-app purchases

1 purchases

Abacus Mental Math Training

One-time1
  • Remove Ads$2.59
None

R77Chat

No in-app purchases

Questions

Is Abacus Mental Math Training free?
Abacus Mental Math Training is free to download, with in-app purchases available.
Is R77Chat free?
R77Chat is free to download, with no in-app purchases.
Do Abacus Mental Math Training or R77Chat have ads?
Abacus Mental Math Training shows ads; R77Chat does not.
Which is updated more often, Abacus Mental Math Training or R77Chat?
Abacus Mental Math Training ships an update monthly, and R77Chat monthly. Most recently, Abacus Mental Math Training was updated on October 11, 2026 and R77Chat on October 4, 2026.

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