Comparison

Calculator´ vs Twin Flame Widget

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

Head to head
About

Calculator´

This app is a powerful and intelligent calculator with a smart UI and live results. It offers basic, advanced, and scientific functions, a history log, customizable themes, and user-definable functions. It also includes features like an on-screen timer and iPad multitasking support.

Highlights
  • Live results and natural feel UI
  • User-definable advanced functions
  • History log with easy access
  • Customizable themes and colors
  • On-screen timer
  • iPad multitasking and Spotlight search
Features
Read full description

Stop your math time-wasting today with this app! Designed to help you zip through your daily math in a swift of your own unique style ;-) * LOVED by thousands for its smart UI with Live results & Natural feel Now featuring user-definable advanced Functions that you can Share easily with other Calculator users and optimizations with iPad multitasking, 3D Touch shortcuts, Expandable Widget, Spotlight searching of History + watchOS native App with haptic. Calculator is super intelligent, multi-functional scientific calculator that makes doing math look like art. It has built-in on-screen timer, notif. center Widget, Custom Keyboard, many pre-set functions like Date-time and Base computations and limitless combination of colors, fonts, shapes and sizes. It features standard basic & scientific calculator functions, history log, and an elegant user interface. The quick timer is designed to help your track remaining mins:secs whenever you are on schedule. It is really clever. It can do live math expressions: from the simplest like "1+2" to more advanced expressions like "3+(3x9(80+sin(90)))" Advanced calculator. By swiping left and right on the app, you can easily access over 50+ advanced math functions. History log. Calculator remembers what you have calculated. Swipe up, and you can see all your previous calculations. Colorful Themes. Limitless lovely themes for you to browse, including optional parallax background image of your choice! Easy access. Tap & Hold a math expression to edit it. Shake your device to undo Tap & Hold a number key for smart parenthesis Tap & Hold the decimal point for RANDOM decimal Tap & Hold the “ans” key for answer history Tap & Hold the “÷” key for 1/x Tap & Hold the “-” key to negate Text style Edit option for Expressions Tapping sound options An In-App purchase is ready if you decide to add the Converter and Basic Graphing! Terms of Service & Privacy Policy: https://oval.fi/privacy-calculator Subscription Terms The subscription auto-renews at the end of each term. Payment will be charged to iTunes Account at confirmation of purchase. The subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period. You may manage your subscription and turn off auto-renewal by going to your Account Settings after purchase. Any unused portion of a free trial period will be forfeited if you purchase a subscription. Instructions on how to cancel a subscription can be found at the following link: https://support.apple.com/en-us/HT202039.

About

Twin Flame Widget

Features
Read full description

Buddy up and build streaks together! Both partners must check in to keep your shared streak alive. Celebrate wins and stay motivated with split-screen widget messages. Because habits stick better when you're not doing it alone. How it works: -Find a buddy or invite a friend -Both of you must check in daily to maintain your streak -Miss a day? Your shared streak resets to zero -Celebrate milestones together with custom widget messages Key Features: -Dual accountability: Success requires both partners -Split-screen design: Chat while tracking your progress -Home screen widgets: Share motivational messages after successful check-ins -Streak tracking: Visual progress for your shared journey

Screenshots

Calculator´3 screens
Twin Flame Widget3 screens

Verdict

The call

The clearest difference is in-app purchases: Twin Flame Widget at none against Calculator´'s 4. Twin Flame Widget also leads on update cadence (every 2 weeks vs every 5 weeks). Calculator´'s advantage is device support (4 vs 2) and iOS requirement (14.0 vs 17.6). On price and ads 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. Calculator´ sells 4 in-app purchases, starting at $0.49 per year. Twin Flame Widget asks for nothing beyond the download.

UpkeepUpdate frequency

Calculator´ ships an update every 5 weeks, Twin Flame Widget every 2 weeks. The most recent releases landed on October 20, 2026 and October 13, 2026 respectively.

Scorecard4 real differences · 6 level
Calculator´ versus Twin Flame Widget: the parameters behind the verdict, then further details
ParameterCalculator´Twin Flame Widget
PriceFreeFree
Rating4.6 (477 ratings) — better—
Positive reviews70.2% of reviews—
Number of ratings477 — better—
Update frequencyEvery 5 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS14.0 — better17.6
Further details — not scored
Size14 MB20 MB
Age rating4+4+
DeveloperOval Software Oywave function x

Bugs and requests

Calculator´

Reported bugs

6 issues
  • Buttons below numbers 1, 2, 3 not responding
  • App crashes when screen fills with numbers
  • Numbers deleted backwards after full screen
  • Swipe down converter doesn't work properly on iPad
  • Pressing equals multiple times adds duplicate results
Show 1 more
  • App becomes unresponsive and requires restart

Requested features

7 requests
  • Haptic feedback support
  • Fraction calculation support
  • RPN mode
  • iCloud sync for history
  • Automatic parentheses
Show 2 more
  • Simple keyboard-only option
  • Better converter UI (swipe functionality)

Twin Flame Widget

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

Calculator´

Subscriptions3
  • Standard features w/ Free Week7 Days trial$0.491 Year
  • Standard features w/ Free Year1 Year trial$0.491 Year
  • Complete feature-set3 Days trial$3.991 Year
One-time1
  • Converter + Graphing$3.99
None

Twin Flame Widget

No in-app purchases

Questions

Is Calculator´ free?
Calculator´ is free to download, with in-app purchases available.
Is Twin Flame Widget free?
Twin Flame Widget is free to download, with no in-app purchases.
Do Calculator´ or Twin Flame Widget have ads?
Neither Calculator´ nor Twin Flame Widget shows ads.
Which is updated more often, Calculator´ or Twin Flame Widget?
Calculator´ ships an update every 5 weeks, and Twin Flame Widget every 2 weeks. Most recently, Calculator´ was updated on October 20, 2026 and Twin Flame Widget on October 13, 2026.

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