# Numvolt: Mental Math Trainer — Sprints, Challenges, Ladder

> Sprints, Challenges, Ladder (iPhone/iPad app by ROMEO ILARIO FLAVIO GAMBINO.)

- Source: https://appshunter.io/ios/app/numvolt-mental-math-trainer/id6809142973 (this page in markdown: same URL + `.md`)
- Developer: [ROMEO ILARIO FLAVIO GAMBINO](https://appshunter.io/developer/1874823696)
- Category: Education, Games, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 30 MB
- Languages: American English, Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, Filipino, Finnish and 34 more
- Released: 2026-09-09
- Data updated: 2026-09-11
- User reviews in markdown: https://appshunter.io/ios/app/numvolt-mental-math-trainer/id6809142973/reviews.md

## What is Numvolt?

Numvolt is the joy of getting better at mental math. Open, calculate, understand, repeat. No account, no ads, optional one-time purchase.

TEN TOPICS, A HUNDRED RUNGS EACH
Addition, subtraction, multiplication, division, fractions, percentages, order of operations, powers, algebra and square roots. Each topic has its own 100-rung journey; the difficulty adjusts during the session, block by block. You pick your starting point at setup, and you can always replay a lower level.

EVERY MISTAKE EXPLAINED
A wrong answer takes nothing away. The correction shows the method — "take away 20, then add 1" — not just the result. In Zen mode there is no timer: time to understand.

SPRINTS AND A DAILY CHALLENGE
15, 30 or 60 seconds on the + − × ÷ mix. +1 per correct answer, −1 per mistake. The daily challenge is the same 60-second series for everyone, all day long.

A LADDER FROM YOUR CITY TO THE WORLD
Join the ladder with a nickname and your city. Your best sprint is ranked on six rungs: city, county, region, country, continent, world. After every sprint you see exactly what you climbed — "5th → 2nd · Rhône" — and how many points you need to overtake the next player. Only your nickname, city and scores are published. Never your exact location.

DUEL ON ONE PHONE
Two players, the same questions in the same order, 30 seconds each. Scores are revealed at the end.

YOUR PROGRESS, VISIBLE
XP, overall level, accuracy, day streak, seven-day chart, level per topic and session history. A Home Screen widget shows your daily goal and starts a sprint in one tap.

WHAT STAYS WITH YOU
Your progress lives on your iPhone, in the app's storage. No account. Anonymous usage counters, which you can switch off in Settings, only tell us where the app gets stuck.

Fractions and decimals accepted on the keypad. Light, dark or automatic appearance. English and French.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Numvolt Pro | $8.99 | one-time |



## Version history (last 2 releases)

### 0.2.1 — 2026-09-09

• Purchases are now measured properly.
• Small display fixes.

### 0.2.0 — 2026-09-09

No release notes.

## More apps by ROMEO ILARIO FLAVIO GAMBINO

- [SeductMaxx](https://appshunter.io/ios/app/seductmaxx/id6769103325)
- [Dual N-Back: IQ Brain Training](https://appshunter.io/ios/app/dual-n-back-iq-brain-training/id6775563998)
- [PuffOff: Quit Vaping & Smoking](https://appshunter.io/ios/app/puffoff-quit-vaping-and-smoking/id6789282894)
- [LarpGPT: AI Photo Prompts](https://appshunter.io/ios/app/larpgpt-ai-photo-prompts/id6805626334)
- [NailSafe: Stop Nail Biting](https://appshunter.io/ios/app/nailsafe-stop-nail-biting/id6805811801)
- [VocalMaxx: Voice & Pitch](https://appshunter.io/ios/app/vocalmaxx-voice-and-pitch/id6806372060)

All apps by ROMEO ILARIO FLAVIO GAMBINO: https://appshunter.io/developer/1874823696

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-11.*