# Binomial Calculator vs Focus

The clearest difference is in-app purchases: Binomial Calculator at none against Focus's 6. Focus's advantage is ads (none vs shown) and update cadence (fortnightly vs every 10 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Focus sells 6 in-app purchases, starting at $2.99 per 7 days. Binomial Calculator asks for nothing beyond the download.

Binomial Calculator ships an update every 10 months, Focus fortnightly. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Binomial Calculator | Focus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 10 months | **Fortnightly** |
| Size | 5 MB | 96 MB |
| Requires iOS | 18.5 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Kevin Tang](https://appshunter.io/developer/1780758221) | [Jiten Siddhpura](https://appshunter.io/developer/1722901596) |

## What reviewers say

### Binomial Calculator

[App page](https://appshunter.io/ios/app/binomial-calculator/id6756537681)

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

**In-app purchases:** none


### Focus

[App page](https://appshunter.io/ios/app/focus-adhd-to-do-app-blocker/id6757419217)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Focus Pro Weekly | $2.99 | per 7 days |
| Focus Pro Monthly | $5.99 | per month |
| Focus Pro Annual | $29.99 | per year |
| Focus Pro Yearly | $29.99 | per year |
| Focus Premium | $3.99 | one-time |
| Focus Executive Lifetime | $69.99 | one-time |


## Frequently asked questions

### Is Binomial Calculator free?

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

### Is Focus free?

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

### Do Binomial Calculator or Focus have ads?

Binomial Calculator shows ads; Focus does not.

### Which is updated more often, Binomial Calculator or Focus?

Binomial Calculator ships an update every 10 months, and Focus fortnightly. Most recently, Binomial Calculator was updated on October 30, 2026 and Focus on November 9, 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.*