About Know Abacus
Abacus is a wonderful mathematical instrument used for calculation. This app will help your children learn about Abacus, Numbers, Counting, Addition, and Subtraction. This is the first step to tap the unexploited...
Abacus is a wonderful mathematical instrument used for calculation. This app will help your children learn about Abacus, Numbers, Counting, Addition, and Subtraction. This is the first step to tap the unexploited potential in their brain and unleash their mathematical capability. Suitable for children age 5 and up, who know about numbers and some basic addition and subtraction. For smaller children, recommend KnowNumber app. * Counting with Abacus * Addition/Subtraction 1 digit * Addition/Subtraction 2 digits * Multiplication 1-2 digits * Division 1-2 digits * Mental math * Review lessons * Unlimited random lessons * Black/white or colorful abacus * Learning modes * Two-touch or multi-touch abacus * Left-handed mode Localized Languages: * English, French, Spanish, Thai, Turkey, Arabic, Portuguese, and Russian
Version History -UI Improvement -Bug fixes 2.0 07/10/2023 Minor bugs fixes. 1.20 04/03/2019 Added Russian and Portuguese languages 1.19 07/06/2018 -Minor bug fixes. 1.18 10/08/2017 -Update arabic languages. -Minor bug fixes. -Fix crashes on some devices. 1.17 08/30/2017 - Left-handed mode - Turn on or off formula tables - Minor bug fixes 1.16 01/05/2017 Add Multi-touch abacus (changed in setting) 1.15 08/15/2015 - 64-bit native support - Stability improvement 1.14 07/31/2015 Stability improvement. Fix review link. 1.13 12/11/2014 - New Language: Arabic - 2 digit multiplication + tutorial - 2 digit division + tutorial - 3 learning modes: (1) step by step, (2) final answer, (3) formal exam 1.12 10/25/2014 2 digit multiplication + tutorial 2 digit division + tutorial 3 learning modes: (1) step by step, (2) final answer, (3) formal exam 1.11 10/11/2014 -Add new colorful abacus -Get real rewards for just learning how to use Abacus. -Fix bugs 1.10 06/13/2014 Fix missing lessons. 1.9 05/30/2014 -Improve visual -Reset Scores in Setting menu -New combined random lessons 1.8 05/06/2014 -Link to Facebook -Share 3 stars achievement to Facebook -Minor bug fixes 1.7 04/11/2014 -New Languages: Spanish, Turkish, French. -Show lesson best time 1.6 01/23/2014 -Division -9 digit abacus 1.5 11/05/2013 - Multiplication. - 2 digit addition/subtraction or hard mode. Change in settings menu. - Mental math. Perform calculation by visualizing the abacus. 1.3 09/10/2013 -In-App purchase to remove Ads -Fix minor bugs 1.2 07/02/2013 -Improve reset button touch -Clarify how to go to next lesson 1.1 05/21/2013 1.0 05/10/2013
Previous Versions
Here you can find the changelog of Know Abacus since it was posted on our website on 2016-09-27 17:26:42.
The latest version is 2.0 and it was updated on 2026-06-22 23:57:55. See below the changes in each version.
Know Abacus version 2.0
Updated At: 2026-05-29
Changes: Version History -UI Improvement
-Bug fixes 2.0 07/10/2023 Minor bugs fixes. 1.20 04/03/2019 Added Russian and Portuguese languages 1.19 07/06/2018 -Minor bug fixes. 1.18 10/08/2017 -Update arabic languages.
-Minor bug fixes.
-Fix crashes on some devices. 1.17 08/30/2017 - Left-handed mode
- Turn on or off formula tables
- Minor bug fixes 1.16 01/05/2017 Add Multi-touch abacus (changed in setting) 1.15 08/15/2015 - 64-bit native support
- Stability improvement 1.14 07/31/2015 Stability improvement.
Fix review link. 1.13 12/11/2014 - New Language: Arabic
- 2 digit multiplication + tutorial
- 2 digit division + tutorial
- 3 learning modes: (1) step by step, (2) final answer, (3) formal exam 1.12 10/25/2014 2 digit multiplication + tutorial
2 digit division + tutorial
3 learning modes: (1) step by step, (2) final answer, (3) formal exam 1.11 10/11/2014 -Add new colorful abacus
-Get real rewards for just learning how to use Abacus.
-Fix bugs 1.10 06/13/2014 Fix missing lessons. 1.9 05/30/2014 -Improve visual
-Reset Scores in Setting menu
-New combined random lessons 1.8 05/06/2014 -Link to Facebook
-Share 3 stars achievement to Facebook
-Minor bug fixes 1.7 04/11/2014 -New Languages: Spanish, Turkish, French.
-Show lesson best time 1.6 01/23/2014 -Division
-9 digit abacus 1.5 11/05/2013 - Multiplication.
- 2 digit addition/subtraction or hard mode. Change in settings menu.
- Mental math. Perform calculation by visualizing the abacus. 1.3 09/10/2013 -In-App purchase to remove Ads
-Fix minor bugs 1.2 07/02/2013 -Improve reset button touch
-Clarify how to go to next lesson 1.1 05/21/2013 1.0 05/10/2013
Know Abacus version 2.0
Updated At: 2023-07-10
Changes: -UI Improvement
-Bug fixes
Know Abacus version 2.0
Updated At: 2023-07-10
Changes: Jul 10, 2023
Version 2.0
-UI Improvement
-Bug fixes
Know Abacus version 1.20
Updated At: 2019-04-03
Changes: Apr 3, 2019 Version 1.20
Minor bugs fixes.
Know Abacus version 1.15
Updated At: 2013-05-10
Know Abacus version 1.20
Updated At: 1970-01-01
Changes: 2019年4月3日 Version 1.20
Minor bugs fixes.
Disclaimer
Official App Store Link
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