$0Always free
Start with the public tools. No subscription is needed.
- Online abacus
- Visual flashcards
- Abacus lessons and educational articles
- Addition PDF worksheets
MENTAL ARITHMETIC · MEMORY · ATTENTION
Explore mental arithmetic with Sorobak.
An online mental arithmetic platform for children, families, and learning centres. Explore the tools, see the real interface, and know exactly what is free and what needs a subscription.
Try free flashcardsCHOOSE YOUR STARTING POINT
Start free. Add full training when you are ready.
Free tools stay free. A subscription adds the training library and arithmetic results to your account.
$8USD / student / month
Full training for one student.
- Everything in Free
- Four arithmetic trainers with saved settings
- Nine brain games plus Calculation + Memory
- Coordinate drawing: all 90 drawings
- Seven levels of Olympiad practice
- Subtraction, mixed, and soroban PDFs
- Arithmetic results, history, and rankings
Creating an account is free. Registration alone does not activate paid training. Free flashcard progress remains available without a subscription.
A LOOK INSIDE
Real tools. A clear path to practice.
Start with number recognition, move into arithmetic practice, and explore memory and attention games. These are previews of the platform you will use.
Screenshots from the Sorobak interface with a demo session.
Free
Make numbers visible.
Move the beads, change the rod count, and see place value on an interactive online abacus. Use it to demonstrate numbers or practise independently.
Try the abacus
Free
Recognise numbers at a glance.
Practise with abacus beads or ordinary numerals. Choose one to three digits, adjust the speed, and use individual or classroom mode.
Try flashcards
Subscription
Build your arithmetic routine.
Practise columns, speed exercises, multiplication, and division. Adjust the training settings and work through Sorobak formulas at your level.
Create an account
Subscription
Bring variety to each session.
Explore nine games including matching pairs, Schulte tables, number memory, colour focus, and odd one out. Pick a different challenge for memory, attention, or logic.
Ask about access
Daily free attempts: 10
Prepare with seven Olympiad levels.
Choose a level from START III to INTERMEDIATE I. Free variants per day: 10. Premium provides unlimited practice.
View access requirements
FOR LEARNING CENTRES
Admins can see how their students are doing.
Centre administrators can review saved arithmetic results and follow student practice from the admin dashboard.
Student results
Review arithmetic points and results for individual students.
Practice activity
See recorded sessions and daily practice history.
Centre rankings
Compare points earned by students in your centre.
Administrator access is for assigned centres and their students. Contact Sorobak to arrange access for your learning centre.
SIMPLE MONTHLY PRICING
Choose the right plan for you
Start with free tools, unlock individual training, or bring Sorobak to your school or learning centre.
Free
$0Always free
Individual
$8USD / student / month
Schools & centres
Manage your school’s student access in one place. See pricing and choose your student places on the subscription page.
View PremiumChoose individual monthly or yearly access, or a monthly school package with student places.
FROM FIRST LOOK TO FIRST SESSION
Getting started is straightforward.
- 01
Try a free tool
Open the abacus or flashcards. You can practise straight away as a guest.
- 02
Create and verify your account
Register with your email address and open the verification link. An account lets you keep private flashcard results.
- 03
Activate full access
For unlimited training, email or call Sorobak. Access costs $8 USD per student per month.
Questions before you start
What is Sorobak?
Sorobak is an online mental arithmetic platform with an interactive abacus, visual flashcards, arithmetic trainers, memory and attention games, and Olympiad practice. Choose your interface language using the selector.
What can I use for free?
The online abacus, flashcards, abacus lessons, educational articles, and addition PDF worksheets are free. Free attempts per Premium activity per day: 10, resetting at midnight in Asia/Yerevan. A free account is needed to save results.
What does the subscription include?
The subscription includes four arithmetic trainers, nine brain games, Calculation + Memory, all 90 coordinate drawings, seven Olympiad levels, paid worksheet PDFs, and arithmetic progress tracking.
Can centre admins see students’ results?
Yes. Assigned centre admins can review their students’ saved arithmetic results, points, practice activity, and centre rankings. Administrator access covers students in their assigned centre. Contact Sorobak to arrange administrator access for your learning centre.
How much does Sorobak cost?
Individual access is $8/month or $70/year. Schools pay $5/month for the administrator plus $8 per student for 1–4 places, $7 for 5–15, or $6 for 16+.
Can I pay online?
Online checkout is not available yet. Create and verify your account, then email [email protected] or call +374 77 166 268 to arrange payment and activation.
Are Olympiad tests free?
Free Olympiad variants per day: 10. Premium provides unlimited practice across all seven levels.
Does it work on a phone or tablet?
Sorobak supports modern phones, tablets, and computers. Classroom flashcards can also be shown on a shared screen.