Comparison

convrt vs Big Yellow Calculator

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

Head to head
About

convrt

Features
Read full description

After selecting a category and an associated unit an input value has to be provided. Once input has been provided and the “Convert" button has been clicked, the keyboard will be dismissed, and the conversion results will be listed in a table underneath the input field. The selected category and unit will appear as the button title. Checks will be executed the validate the input provided. An error message will be displayed if invalid input is entered. All categories can deal with decimal input including decimal places. Exceptions are the categories 'Numeral' and 'Data'. These categories don't allow decimal places. For the 'Numeral' category input depends on the selected unit; binary only allows 0 and 1, octal only allows for 0..7, decimal only allows for 0..9 and hexadecimal allows for 0..9 and A..F. The categories Circle, Data and Temperature have an option “Table" in the Unit list. When selected the app will list formulas used to execute the conversions (for Circle and Temperature) and a table with all data storage units and how they relate to each other (for Data). Tables will be listed without the need to provide Input or pressing the Convert button. More detailed Help information is provided on the Help screen in the app. In settings you can set number of decimal places for each of the category's unit conversion results and if you want to use grouping separators. Also you have the option to change the color of the buttons on the main screen.

About

Big Yellow Calculator

This versatile calculator app offers customizable layouts, switching between standard and scientific modes. It also allows users to store up to 10 intermediate results for complex calculations, making it a functional tool for various needs.

Highlights
  • Customizable layouts
  • Standard and scientific modes
  • Store intermediate results
  • Up to 10 stored results
  • Versatile functionality
Features
Read full description

Tired of rigid, one-size-fits-all calculator interfaces? CustomCalc redefines your calculating experience with two powerful core features tailored for personalized and efficient math work. Fully Customizable Button Layout Take full control of your calculator interface! Add, delete, rearrange, and hide any function buttons based on your daily needs. Whether you want a minimal layout for simple daily arithmetic or a customized panel for advanced scientific calculations, you can design it in one tap. Drag-and-drop operation makes layout adjustment intuitive and effortless, eliminating useless buttons and keeping your most-used functions front and center. Save & Recall Intermediate Results Solve complex multi-step calculations effortlessly! Store any intermediate values during your computing process with one click. Access, edit, or reuse saved results anytime without rewriting formulas or retyping numbers. Perfect for accounting, engineering calculations, student homework, and daily multi-step math tasks, greatly reducing calculation errors and saving your time. Designed for iOS devices, CustomCalc delivers smooth, ad-free calculating performance. Customize your layout, organize your data, and calculate smarter today!

Screenshots

convrt1 screens
Big Yellow Calculator3 screens

Verdict

The call

The clearest difference is in-app purchases: convrt at none against Big Yellow Calculator's 1. Big Yellow Calculator's advantage is update cadence (every 2 months vs every 25 months). On price, ads, device support and iOS requirement 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. Big Yellow Calculator sells 1 one-off in-app purchase. convrt asks for nothing beyond the download.

UpkeepUpdate frequency

convrt ships an update every 25 months, Big Yellow Calculator every 2 months. The most recent releases landed on October 19, 2026 and October 12, 2026 respectively.

Scorecard2 real differences · 7 level
convrt versus Big Yellow Calculator: the parameters behind the verdict, then further details
ParameterconvrtBig Yellow Calculator
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 25 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.615.6
Further details — not scored
Size3 MB1 MB
Age rating4+4+
DeveloperHerbert Jonkman山 黄

In-app purchases

None

convrt

No in-app purchases

1 purchases

Big Yellow Calculator

One-time1
  • Unlock all features$0.99

Questions

Is convrt free?
convrt is free to download, with no in-app purchases.
Is Big Yellow Calculator free?
Big Yellow Calculator is free to download, with in-app purchases available.
Do convrt or Big Yellow Calculator have ads?
Neither convrt nor Big Yellow Calculator shows ads.
Which is updated more often, convrt or Big Yellow Calculator?
convrt ships an update every 25 months, and Big Yellow Calculator every 2 months. Most recently, convrt was updated on October 19, 2026 and Big Yellow Calculator on October 12, 2026.

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