# Calc vs Focus Protocol

The clearest difference is price: Calc at Free against Focus Protocol's $0.99. Calc also leads on iOS requirement (12.0 vs 26.0). Focus Protocol's advantage is update cadence (every 6 weeks vs every 10 months). On ads, in-app purchases and device support there is nothing between them.

Calc is free to download; Focus Protocol costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Calc ships an update every 10 months, Focus Protocol every 6 weeks. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Calc | Focus Protocol |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/calc-50/id1193016704/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 38 MB | 2 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [David Smith](https://appshunter.io/developer/1193016703) | [Alice-Georgiana TURCANU](https://appshunter.io/developer/1834220789) |

## What reviewers say

### Calc

[App page](https://appshunter.io/ios/app/calc-50/id1193016704)

This app offers a high-precision scientific calculator with over 50 digits of accuracy. It supports advanced mathematical functions, complex arithmetic, and programmable features for derivatives, integrals, and root finding.

**Highlights:** High-precision calculations (50+ digits), Extensive mathematical functions, Programmable features, Complex arithmetic, Graphing capabilities, Derivative and integral calculation

**Features:** macOS Compatibility

**In-app purchases:** none


### Focus Protocol

[App page](https://appshunter.io/ios/app/focus-protocol/id6757204088)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calc free?

Calc is free to download, with no in-app purchases.

### Is Focus Protocol free?

Focus Protocol costs $0.99, with no in-app purchases.

### Do Calc or Focus Protocol have ads?

Neither Calc nor Focus Protocol shows ads.

### Which is updated more often, Calc or Focus Protocol?

Calc ships an update every 10 months, and Focus Protocol every 6 weeks. Most recently, Calc was updated on October 24, 2026 and Focus Protocol on October 15, 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.*