OGE
Year 9Start with mathematics or Russian.
OGE or EGE?
You've got this.
Practise questions, review mistakes
and track your progress.
All in Telegram.
Free plan available · No separate app
Try a questionSTOBALLMini App
Now I see it!See how the answer works.
Real interface · Demo data
Right in TelegramStep-by-step explanationsProgress you can see
OPEN. SOLVE. UNDERSTAND.
A big goal.
A clear next step.
Getting ready starts with a single question.
Try one today.
- 01
Choose your focus
Pick OGE or EGE, then choose a subject and set your goal.
- 02
Take a shot
Enter an answer or choose an option. See how you did.
- 03
Review a mistake
Read the worked solution. Ask the AI tutor for help if you get stuck.
- 04
See your progress
Find your practice history, accuracy, XP and streaks in your profile.
TRY IT HERE
Learn the logic.
Make it stick.
Here is a real question from STOBALL. Check your answer and see how to work through it.
This is practice. Mistakes are welcome.
This demo runs in your browser.
It won't change your Telegram progress.
Find the missing angle
Two angles of a triangle measure 40° and 65°. Find the third angle in degrees.
Show solution
- The angles of a triangle add up to 180°.
- Subtract the known angles: 180° − 40° − 65°.
- The third angle is 75°.
FIND YOUR OWN ROUTE
Your exam.
Your subjects.
Choose a subject in the bot.
Practice and explanations are inside.
EGE
Year 11Choose a subject in the bot to start practising. The questions available vary by topic.
AI tutorSTOBALL
Example dialogueWhy do I subtract from 180°?
The three angles of a triangle add up to 180°.
Two angles are already known:
40° + 65° = 105°
The third is what remains:
180° − 105° = 75°
Now I see how we got the answer.
Example conversation with the AI tutor.
YOU CAN ASK AGAIN
“I'm stuck”
is a good place to start.
Ask for a hint or put a question to the AI tutor. Go back to the step that didn't make sense.
Work through the reasoning, then try it yourself.
Open STOBALLAI can make mistakes. Double-check explanations and important conclusions.
SMALL STEPS ADD UP
A little further
than yesterday.
Practise, earn XP and notice what you're getting better at. Every session counts.
Practice experience240XPDemo data
24 answered18 correct
Your practice streak3 days in a row
MON✓
TUE✓
WED✓
THU·
FRI·
SAT·
SUN·
Daily quest3 of 5 questions
3-day streak achievement
Practice in numbersSee how many questions you answered and how often you got them right.
Build a routineEarn XP, continue a streak and try a daily quest.
Spot the topics to revisitUse your practice history to decide what to review next.
This shows an example profile. XP measures activity in the app and is separate from exam scores.
FOR PARENTS
Be there.
See the effort.
Help build a routine and talk about what's going well. A learner's profile shows the questions completed, accuracy and practice activity.
01
Support without pressure
Start with a short session and talk about one topic that feels clearer now.
02
See progress in numbers
Your learner can share their stats and decide with you what to review next.
FREE TO GET STARTED
Give it a try.
Find your pace.
Start with the free plan.
PRO offers more room for frequent practice.
| Features | FreeGet started | PROPractise at your pace |
|---|---|---|
| Practice questions | Daily allowance | More practice |
| AI tutor questions | Introductory access | Extended access |
| Mock exams | Introductory mock exam | Extended access |
| Check answers and see solutions | Included | Included |
| Progress and XP | Included | Included |
Get started in Telegram
PRO: ₽290 per month or ₽2,690 per year for one subject.
Paid plans are being prepared. Payments are currently closed.
Plan details and terms
How do I get started?
Open @stoball_ai_bot in Telegram, start the bot and open the Mini App. Choose your year and subjects, then try a question.
Is STOBALL free?
Yes. The free plan includes practice, answer checks and explanations. PRO extends access to questions, the AI tutor and mock exams. Check the bot for current limits and pricing.
What exams and subjects can I practise?
Mathematics and Russian are available for OGE. EGE covers the eight subjects listed above. Open the bot to see the available topics and questions.
Can I practise on my phone?
Yes. Open the Mini App inside Telegram on your phone. The website does not require a separate account.
Do I need to install another app?
If you already have Telegram, open the bot and launch the Mini App from there.
How does the AI tutor help?
Ask for a hint during practice or send a question in the AI section. The tutor explains the steps and can make mistakes. Check important conclusions with a textbook or teacher.
What does PRO include?
PRO offers more practice, AI questions and mock exams. The bot shows duration, limits and final price before payment. Progress takes regular practice.
How do I get support?
Open support in Telegram and describe your question. If something went wrong, include the screen and what you were doing.
How is my data protected?
The server verifies Telegram sign-in data for the Mini App. This landing page has no sign-up form or third-party analytics and does not upload your practice answers. See the privacy policy for details.