Calculator² vs Focus Rail
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator²
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.
- 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
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The smart calculator for iOS. Scientific Calculator An advanced calculator with a comprehensive set of mathematical functions including trigonometric, hyperbolic, logarithmic, exponential, factorial, combination and permutation. Over 125 mathematical and physical constants are accessible in an easy-to-navigate list. Implicit multiplication and operator precedence are supported for faster input, while the unique memory mode also provides a facility for statistical functions. Financial Calculator* A calculator with a variety of functions for performing financial calculations, such as determining the monthly payments on a loan or the price of an item after tax has been applied. Individual rates can be set for markup, discount, tax and interest. Perfect for students and professionals who wish to verify the results of time value of money calculations. Programmer Calculator A powerful tool for conversions between decimal, hexadecimal, octal and binary number bases, with a unique view for entering ASCII keys. Bitwise operations including AND, OR, XOR and NOT are available, in addition to functions not usually found in a programmer calculator, such as square and factorial. Basic Calculator A simple, easy-to-use calculator for quick, everyday calculations. Currency Converter* A currency calculator providing accurate conversions between 150+ World currencies. The exchange rates are easily updated to real-time values from the Open Exchange Rates API, while favourite currency conversions can be saved for easy comparisons. Unit Converter A comprehensive unit converter with over 200 units across 26 categories, including temperature, fuel consumption, viscosity, radiation and more. * The Financial Calculator and Currency Converter are unlocked by an in-app purchase
Focus Rail
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.
- 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
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Focus Rail is a focus timer that turns work and study sessions into train journeys across real railway routes. Choose a starting station, set a session length, and board your train. As you stay focused, your route moves forward on the map. It is a simple idea, but it makes a plain timer feel much more alive. Focus Rail is built for people who want more than a countdown: • Start study sessions with a clear ritual • See progress through a moving train and live route • Use Pomodoro style sessions or longer deep work blocks • Keep active sessions visible with Live Activities • Review past trips and build a routine you can stick with • Add ambient sound when you want a calmer workspace What you can do: • Pick an origin station and travel to real destinations • Set short study bursts or long deep work sessions • Follow your journey on the map in real time • Use optional screen controls when you want fewer distractions • Check trip history and session stats • Choose map styles that match your mood • Get reminders to start your next session Focus Rail works well for study, reading, writing, coding, exam prep, and quiet solo work. If Pomodoro timers feel too flat and traditional focus apps feel too cold, this gives you something more motivating without getting in your way. Focus Rail Pro unlocks more map styles, full trip history, Live Activities, and extra ways to stay on track. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Calculator² | Focus Rail |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (7 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | — | 7 — better |
| Update frequency | Every 3 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 78 MB | 93 MB |
| Age rating | 4+ | 4+ |
| Developer | Richard Walters | Mithilesh Chellappan |
Customer experience
Calculator²
Focus Rail
In-app purchases
Calculator²
- Financial Calculator$0.99
- Currency Converter$0.99
- Calculator² Premium$1.99
Focus Rail
- Focus Rail Pro$3.991 Month
- Focus Rail Pro7 Days trial$19.991 Year
- Focus Rail Pro (Lifetime)$35.99









