Comparison

Numvolt vs InovaQB

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Numvolt

Enhance your mental math skills with a comprehensive trainer offering 15 topics and 150 levels each. Learn fastest calculation methods, track progress, and compete globally. Features include daily challenges, duels, and a home screen widget.

Highlights
  • 15 topics, 150 levels each
  • Fastest calculation method explanations
  • Daily challenges and sprints
  • Global ladder rankings
  • Two-player duels
  • Progress tracking and home screen widget
Features
Read full description

Numvolt helps you get better at mental math: open, calculate, understand, repeat. No account and no ads. For new installations, Numvolt Pro is required to start sessions after onboarding. Choose a yearly subscription or a lifetime one-time purchase; the price and terms are shown before purchase. FIFTEEN TOPICS, A HUNDRED AND FIFTY RUNGS EACH Addition, subtraction, multiplication, division, fractions, percentages, order of operations, powers, algebra, square roots, signed numbers, proportions, time and durations, unit conversion and number patterns. Each topic has its own 150-rung journey, up to five elite chapters; the difficulty adjusts during the session, block by block. You pick your starting point at setup, and you can always replay a lower level. THE FASTEST METHOD, FOR EVERY CALCULATION After a mistake, and at the end of a session for your slowest answers, Numvolt shows you the fastest way to do it in your head, step by step: 71 × 87 is 70 × 87 + 87; 79² is 80² − 160 + 1. With the reflex to keep and other ways to do it. In the courses, type any calculation and the app explains the best method. 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. Available in 49 languages. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

InovaQB

Features
Read full description

A PNA é uma maratona. Treina como tal. O InovaQB é um question bank em português de Portugal feito para a Prova Nacional de Acesso à formação especializada. Mais de 4 600 perguntas clínicas, todas com 5 opções e 5 justificações, para perceberes não só porque a resposta certa está certa, mas porque cada distractor está errado. O que vais encontrar • 5 opções e 5 justificações por pergunta, que é o que diferencia estudar de decorar • Modo aprendizagem, com explicação imediata a seguir a cada pergunta • Modo simulação cronometrado: 240 minutos para 150 perguntas, o tempo oficial da PNA • Provas oficiais de 2020 a 2025, versões A e B, com a pausa formal entre a Parte I e a Parte II • Revisão espaçada: guardas a pergunta e ela volta sozinha a 1, 3, 7, 14, 21 e 30 dias, até ficar consolidada • Estatísticas por domínio, área e dificuldade, com percentil estimado • Marcadores, notas pessoais e destaques em cada pergunta • Painel com valores de referência (gasometria, ionograma, hemograma, bioquímica) sempre à mão • 299 capítulos de estudo, um por cada tema da matriz, de leitura livre • Flashcards com repetição espaçada, e podes escrever os teus Conteúdo alinhado com a matriz oficial Todas as perguntas seguem a matriz oficial da PNA: 5 domínios (Medicina, Cirurgia, Pediatria, Ginecologia/Obstetrícia, Psiquiatria), 39 áreas clínicas e 299 temas. Cada pergunta está classificada num tema específico, e filtras com a granularidade que quiseres. O conteúdo nasce da bibliografia oficial da PNA e das Normas de Orientação Clínica da DGS, e passa por revisão clínica antes de chegar a ti. Para quem é Médicos finalistas e recém-formados em internato de formação geral a preparar a PNA, o exame que decide a colocação no Internato Médico em Portugal. Privacidade Não vendemos dados. Cumprimento integral do RGPD, com subprocessadores europeus. Política completa em www.inovaqb.pt/politica-de-privacidade. Construído por médicos, em desenvolvimento contínuo. Feedback bem-vindo em geral@inovaqb.pt.

Screenshots

Numvolt4 screens
InovaQB4 screens

Verdict

The call

The clearest difference is update cadence: Numvolt at every 2 days against InovaQB's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Numvolt sells 2 in-app purchases, starting at $14.99 per year and InovaQB sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Numvolt ships an update every 2 days, InovaQB every 2 weeks. Both last shipped on October 29, 2026.

Scorecard1 real difference · 8 level
Numvolt versus InovaQB: the parameters behind the verdict, then further details
ParameterNumvoltInovaQB
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 2 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.4 — better
Further details — not scored
Size44 MB36 MB
Age rating4+17+
DeveloperROMEO ILARIO FLAVIO GAMBINOCelvimed Lda

In-app purchases

2 purchases

Numvolt

Subscriptions1
  • Numvolt Pro Yearly3 Days trial$14.991 Year
One-time1
  • Numvolt Pro$24.99
3 purchases

InovaQB

One-time3
  • Premium 6 meses$69.99
  • Premium 12 meses$119.99
  • Premium até à PNA 2027$119.99

Questions

Is Numvolt free?
Numvolt is free to download, with in-app purchases available.
Is InovaQB free?
InovaQB is free to download, with in-app purchases available.
Do Numvolt or InovaQB have ads?
Neither Numvolt nor InovaQB shows ads.
Which is updated more often, Numvolt or InovaQB?
Numvolt ships an update every 2 days, and InovaQB every 2 weeks. Most recently, Numvolt was updated on October 29, 2026 and InovaQB on October 29, 2026.

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