# Calculator² vs Focus Rail

The clearest difference is update cadence: Focus Rail at every 4 weeks against Calculator²'s every 3 months. Calculator²'s advantage is iOS requirement (9.0 vs 17.0). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Calculator² sells 3 one-off in-app purchases and Focus Rail sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Calculator² ships an update every 3 months, Focus Rail every 4 weeks. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Calculator² | Focus Rail |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (7 ratings)](https://appshunter.io/ios/app/focus-rail-pomodoro-timer/id6758016543/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 78 MB | 93 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Richard Walters](https://appshunter.io/developer/1137474748) | [Mithilesh Chellappan](https://appshunter.io/developer/1832137339) |

## What reviewers say

### Calculator²

[App page](https://appshunter.io/ios/app/calculator/id1137474749)

This app offers a suite of specialized calculators, including scientific, financial, programmer, and basic functions. It also features a currency converter and a comprehensive unit converter for various needs.

**Highlights:** Scientific calculator with advanced functions, Financial calculator for loan and tax calculations, Programmer calculator for number base conversions, Currency converter with real-time rates, Unit converter for over 200 units, Basic calculator for everyday use

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Financial Calculator | $0.99 | one-time |
| Currency Converter | $0.99 | one-time |
| Calculator² Premium | $1.99 | one-time |


### Focus Rail

[App page](https://appshunter.io/ios/app/focus-rail-pomodoro-timer/id6758016543)

This app transforms focus sessions into engaging train journeys across real railway routes. Stay motivated by watching your progress on a map as you complete work or study blocks. It offers a more visually dynamic alternative to traditional timers.

**Highlights:** Gamified train journeys for focus sessions, Pomodoro and deep work session options, Live Activities for active sessions, Trip history and session statistics, Ambient sound options, Customizable map styles

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Focus Rail Pro | $3.99 | per month |
| Focus Rail Pro | $19.99 | per year |
| Focus Rail Pro (Lifetime) | $35.99 | one-time |


## Frequently asked questions

### Is Calculator² free?

Calculator² is free to download, with in-app purchases available.

### Is Focus Rail free?

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

### Do Calculator² or Focus Rail have ads?

Neither Calculator² nor Focus Rail shows ads.

### Which is updated more often, Calculator² or Focus Rail?

Calculator² ships an update every 3 months, and Focus Rail every 4 weeks. Most recently, Calculator² was updated on October 16, 2026 and Focus Rail on October 24, 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.*