Comparison

Calculator² vs Focus Rail

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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

About

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.

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
Read full description

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

Calculator²4 screens
Focus Rail4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
Calculator² versus Focus Rail: the parameters behind the verdict, then further details
ParameterCalculator²Focus Rail
PriceFreeFree
Rating—5.0 (7 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—7 — better
Update frequencyEvery 3 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPodiPhone, iPad
Requires iOS9.0 — better17.0
Further details — not scored
Size78 MB93 MB
Age rating4+4+
DeveloperRichard WaltersMithilesh Chellappan

Customer experience

Calculator²

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Focus Rail

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Calculator²

One-time3
  • Financial Calculator$0.99
  • Currency Converter$0.99
  • Calculator² Premium$1.99
3 purchases

Focus Rail

Subscriptions2
  • Focus Rail Pro$3.991 Month
  • Focus Rail Pro7 Days trial$19.991 Year
One-time1
  • Focus Rail Pro (Lifetime)$35.99

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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