# Calcular vs NBackCalc

The clearest difference is price: NBackCalc at Free against Calcular's $0.99. NBackCalc also leads on update cadence (every 2 days vs every 19 months) and iOS requirement (17.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

NBackCalc is free to download; Calcular costs $0.99 up front. Calcular sells 1 one-off in-app purchase and NBackCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Calcular ships an update every 19 months, NBackCalc every 2 days. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Calcular | NBackCalc |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 1 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pierre Stanislas](https://appshunter.io/developer/1261009329) | [YOSHINORI KONNO](https://appshunter.io/developer/1883074860) |

## What reviewers say

### Calcular

[App page](https://appshunter.io/ios/app/calcular-mental-math-trainer/id1506363398)

Practice arithmetic entirely hands-free with voice commands. Problems are spoken aloud, and answers are given by speaking, allowing you to train your brain while commuting, exercising, or cooking. Features adaptive difficulty and detailed progress tracking.

**Highlights:** Fully voice-driven gameplay, Adaptive difficulty levels, Elo rating system, Times table mastery map, Streak-based challenges, Smart progress tracking, Apple Intelligence insights

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calcular premium | $2.99 | one-time |


### NBackCalc

[App page](https://appshunter.io/ios/app/nbackcalc-working-memory/id6760832395)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 開発者を応援する | $0.99 | one-time |


## Frequently asked questions

### Is Calcular free?

Calcular costs $0.99, and also offers in-app purchases.

### Is NBackCalc free?

NBackCalc is free to download, with in-app purchases available.

### Do Calcular or NBackCalc have ads?

Neither Calcular nor NBackCalc shows ads.

### Which is updated more often, Calcular or NBackCalc?

Calcular ships an update every 19 months, and NBackCalc every 2 days. Most recently, Calcular was updated on October 12, 2026 and NBackCalc on October 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*