Comparison

All in One Calculator vs Dev Calc

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

Head to head
About

All in One Calculator

This comprehensive calculator app offers a wide range of functionalities for everyday and complex calculations. It features multiple calculator views, a unit converter, and a detailed history log. Designed for ease of use and accessibility, it supports multitasking and various input methods.

Highlights
  • Multiple calculator views (Standard, RPN, Programmer)
  • Extensive unit converter with nearly 500 units
  • Detailed calculation history with annotation
  • Multitasking and drag-and-drop support
  • Adjustable precision and keyboard shortcuts
  • Light and Dark appearance options
Features
Read full description

All in One (aio) Calculator puts three calculators and a unit converter in one app: infix, RPN and programmer, with fractions, statistics, and close to 500 units in 38 measurements. Ideal for everyday use or more complex needs. The app is free and without ads. It's an easy-to-use, modern calculator. General features • Designed for iPhone and iPad • Sidebar and tab bar for easier navigation and sharing of data • Open a sidebar entry in its own window: drag it to the edge of the screen, pinch it apart, or use its context menu • Drag a calculator button to the edge of the screen to create a new calculator window • Widget showing recent results • Context menus throughout for quick access to many features • Scribble • Windowed apps and Stage Manager • Multitasking • Quick Notes • Capture text • Keyboard shortcuts • Mark favorites and edit the lists to show only what you use • Full support for drag and drop • Light and Dark appearance • Quick Guide for easy onboarding • Toolbar for easy access to many features • Accessibility features like VoiceOver and Voice Control • Speak any result aloud • Home Screen quick actions from the app icon • Delete button for easy editing • Undo and redo • Adjustable precision for decimal results, with a slider for quick changes • Spotlight Search • App Intents for use with Shortcuts Calculator Views • Expressions written in mathematical form • Views for Infix (standard), RPN and Programmer • Statistical functions (average, standard deviation and more) • Expression editing • Share results, including using AirDrop • Common memory functions • View contents in memory • Multiline expression in portrait and landscape • Every function is available in portrait, so there is no need to rotate the device: slide the keypad down to reveal the advanced functions • Landscape shows more keys at once • Groups of advanced functions: switch from the toolbar or by swiping the keypad, and long press the toolbar button to see each group by name • Pinch the result to adjust the precision • Various button styles • Number pad on the right or left for better accessibility Unit Converter • Close to 500 units in 38 measurements, including Currency • Share a result, or paste it back into the calculator for further use • Search measurements and units • Favorite units sync across your devices, and with Converter of Units, through iCloud History • History (paper tape) lets you see and use previous calculations • Results from the calculator and the unit converter are saved here • Annotate history entries to remember what they were • Search in history • Share a previous result, or paste it back into the calculator • Optional iCloud sync across your devices Information • Detailed in-app help for every feature • Table of contents and search allow you to find topics of interest RPN • Shows as many rows in the stack as needed • Shows the expression that generates the result • Drag and drop among rows • Buttons to manipulate the stack Programmer • Support for hexadecimal, octal and binary number systems • Manipulate individual bits • Many bitwise operators • Shows equivalent ASCII and Unicode characters Fractions • Fractions can be converted to different forms, including decimal • Fraction keys can be changed to other keys in portrait mode You no longer need several calculators, nor a unit converter. Future updates will continue to add more features. Enjoy our app that, as always, is free and without ads!

About

Dev Calc

This app assists developers and programmers with immediate numeric conversions between binary, octal, decimal, and hexadecimal formats. It also provides tools for generating color codes from RGB, HSL, and HSV values, with a color picker and preset options.

Highlights
  • Numeric conversion (Bin, Oct, Dec, Hex)
  • Signed/Unsigned options
  • Adjustable bit sizes (8, 16, 32, 64)
  • RGB, HSL, HSV color code generation
  • Color picker
  • Preset color options
Features
Read full description

You can convert numeric to Bin, Oct, Dec, Hex immediately with Signed, Unsigned. ** Introduction ** This is a calculator app to help System Developers and Programmers. Convert numeric to binary, octal, decimal, hex immediately. You can set conversion bit number and signed/unsigned, so you can adjust settings for binary, short, int, long. Also you can get clolor code for system application from RGB and Color Picker. And you can choose preset color simply. ** Overview ** - Convert numeric to binary, octal, decimal, hex immediately. - You can edit each digits for detailed confirmation. - You can get color code from RGB, HSL, HSV and Color Picker. - Using preset color, you can get color code quickly. ** Characteristics ** >> Numeric conversion - You can input numeric in binary, octal, decimal, hex. - You can choose bits size from 8bits, 16bits, 32bits, 64bits. - You can choose signed numeric or unsigned numeric. - you can edit each digits directly. >> Color code - You can see a color code in Hex, RGB, HSL and HSV. - Support alpha channel of color. - You can get a color code from RGB, HSL, HSV adjuster and Color Picker. - You can get a color code just by choosing a preset color. ** Terms of Use ** https://coconutsdevelop.com/en/terms/terms_of_use.html ** Developer website ** https://coconutsdevelop.com/

Screenshots

All in One Calculator4 screens
Dev Calc4 screens

Verdict

The call

The clearest difference is rating: All in One Calculator at 4.7 against Dev Calc's 2.0. All in One Calculator also leads on in-app purchases (none vs 1) and ads (none vs shown). Dev Calc's advantage is iOS requirement (13.0 vs 18.0). On price and device support 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. Dev Calc sells 1 in-app purchase, starting at $1.99 per month. All in One Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

All in One Calculator holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: All in One Calculator has 186 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 85% of All in One Calculator's written reviews are positive against 60% of Dev Calc's.

UpkeepUpdate frequency

All in One Calculator ships an update monthly, Dev Calc every 2 months. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

Scorecard8 real differences · 2 level
All in One Calculator versus Dev Calc: the parameters behind the verdict, then further details
ParameterAll in One CalculatorDev Calc
PriceFreeFree
Rating4.7 (186 ratings) — better2.0 (2 ratings)
Positive reviews84.8% of reviews — better60.0% of reviews
Number of ratings186 — better2
Update frequencyMonthly — betterEvery 2 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.013.0 — better
Further details — not scored
Size70 MB51 MB
Age rating4+4+
DeveloperRamon RivasToshiya Hondo

Customer experience

All in One Calculator

All ratings186 ratings
Positive93.0%
Neutral2.7%
Negative4.3%
Written reviews33 reviews
Positive84.8%
Neutral0.0%
Negative15.2%

Dev Calc

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews5 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

Bugs and requests

All in One Calculator

Reported bugs

9 issues
  • Constantly nags to login to iPhone account
  • Keypad is unresponsive
  • App 'blinks' on iPad Pro
  • Two taps of enter key required
  • Exponent function (y^x) yields 0
Show 4 more
  • Copy and paste don't work (initially)
  • Rotation does not work
  • Stack entries not showing on screen in RPN mode
  • Miscalculations reported

Requested features

2 requests
  • Electrical circuit calculator/chart for AC/DC circuits
  • Support for signed integers (16, 32, 64 bit) in programmer mode

Dev Calc

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

All in One Calculator

No in-app purchases

1 purchases

Dev Calc

Subscriptions1
  • Remove Ads (Monthly)$1.991 Month

Questions

Is All in One Calculator free?
All in One Calculator is free to download, with no in-app purchases.
Is Dev Calc free?
Dev Calc is free to download, with in-app purchases available.
Which has better reviews, All in One Calculator or Dev Calc?
All in One Calculator is rated higher. All in One Calculator averages 4.7 out of 5 from 186 ratings, while Dev Calc averages 2.0 from 2 ratings.
Do All in One Calculator or Dev Calc have ads?
Dev Calc shows ads; All in One Calculator does not.
Which is updated more often, All in One Calculator or Dev Calc?
All in One Calculator ships an update monthly, and Dev Calc every 2 months. Most recently, All in One Calculator was updated on October 8, 2026 and Dev Calc on October 7, 2026.

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