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Abacus' brain

Abacus' brain
  • #: 13121
  • Price: $1.99 In Apple Store
  • Category: Games
  • Updated: 2014-11-20
  • Current Version: 2.1
  • 2.1
  • Size: 1.90 MB
  • Language: English, Japanese
  • Seller: hiroyuki nisiguti
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 3.1.3 or later
  •  Add to Favorite apps



The mental calculation speed rapidly becomes early by putting the abacus in the head.

This software is an application program that sequentially adds ten figures that appear one after another, and becomes familiar with the abacus.

The level of the sense from the digit number and 3 seconds from 1 digit to the treble to 1 seconds is prepared. Where can you calculate?

The mental calculation mode is prepared of course, and calculate with an abacus in the head, please. The mental calculation of the flash of the treble is not a dream.

What's New in Version 2.1

iOS8 compatibility.
iPhone6, iPhone6 Plus compatibility.

iPhone Screenshots

Abacus' brain iPhone Screenshot 1
Abacus' brain iPhone Screenshot 2
Abacus' brain iPhone Screenshot 3
Abacus' brain iPhone Screenshot 4
Abacus' brain iPhone Screenshot 5

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Rated 4/5 based on 2 customer reviews.


4/5 stars

Good, but I wish it had a couple more functions

This is the best app that I've found for drilling rapid addition on the abacus. I use it daily, but I do wish three things were different. 1) that you could turn off the sound. I've had to tuen off my ringer to avoid the sound, then forgotten to turn it back on an missed calls. 2) better instructions. I didn't realize you have to pass a speed round in order to practice with more than 1 digit. 3) Addition only. I wish you could choose subtraction only or mixed
Addition and subtraction. Simple multiplication or division would be nice too. Overall I really enjoy it, hopefully new versions will include these features.

4/5 stars

Good addition exercises but needs subtraction, multiplication and division.

I got this for my 7-year-old son but I enjoy working on it as well. Too bad the drill only comes with addition. I will like it a lot more and will highly recommend it if the update will add the mixed drills. One can grow out of the addition exercise fast.


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