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Pricing

Simple, honest pricing.

Start for free. Upgrade when you're ready to go all in.

Cancel anytime  ·  No hidden fees  ·  Secure payment via Stripe

What's included

Choose the training depth that fits you.

Start free, or unlock the full Calculator Brain System with PRO.

Daily practice
All mental math tricks
Fix your weak spots automatically
Custom training modes
Advanced progress tracking
Free Always free
PRO Unlock everything

Train your brain to think faster with numbers.

Numina PRO gives you the system to build real mental speed, target your weaknesses, and apply math instantly in real-world situations.

Faster Progress

Train with focused speed drills that rapidly improve how fast you think with numbers.

Smarter Targeting

Weakness mode identifies where you struggle and trains those patterns until they become automatic.

Real-World Math

Apply mental math instantly to prices, discounts, tips, and everyday decisions.

Confidence Under Pressure

Stay calm and accurate in exams, challenges, and real-time situations.

Included with PRO

Everything you unlock with Numina PRO

You're not just getting training — you're unlocking a complete mental math system.

Mental Math Cheat Sheets

Quickly recall powerful tricks without relearning them every time.

Calculator Killer Trick Library

Impress people by solving calculations faster than they can on a calculator.

30-Day Mental Math Accelerator

A structured system that builds your speed step by step.

Custom Training Modes

Create your own drills and train exactly what you want.

Our Guarantee

The Calculator Challenge Guarantee

Train with Numina for 14 days.
Improve your speed. Beat your personal records.
And beat a calculator in at least one challenge.

If you don't feel faster and more confident with numbers, you get your money back.

Become the person who doesn't need a calculator.

Start free, or unlock the full system with PRO.

Start Training Free Free plan  ·  7-day PRO trial
FAQ

Questions, answered.

The free plan includes 3 gamemodes and 5 core mental math techniques — enough to experience Numina and start building real speed. There's no time limit; you can use it forever. Upgrade to Pro to unlock all 350+ gamemodes, the complete technique library, and everything else.
Yes, absolutely. Cancel anytime from your billing portal — no calls, no forms. You'll keep Pro access until the end of your current billing period, then revert to the free plan. No charges after cancellation.
With the yearly plan you pay a single annual charge instead of month by month — typically saving over 30% compared to the monthly rate. The per-month equivalent is shown on the pricing card above when you select Yearly.
Never. Your streaks, scores, and history are always yours — regardless of your plan. If you cancel Pro you simply revert to the free tier; your data stays intact if you ever choose to upgrade again.
Numina has a generous free tier so you can experience real training before upgrading. We don't currently offer a separate time-limited trial for Pro — but the free plan genuinely lets you feel the product before committing.
We accept all major credit and debit cards, Apple Pay, and Google Pay — processed securely via Stripe. Your card details are never stored on our servers.