Comparison

Numerical³ vs Promise

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

Head to head
About

Numerical³

A powerful and beautifully designed calculator app that offers advanced scientific functions, automatic bracket handling, and a unique no-equals button interface. It integrates seamlessly with iOS features like widgets and keyboards for calculations anywhere.

Highlights
  • No equals button interface
  • Automatic bracket handling
  • Full scientific keypad
  • Today Widget integration
  • Numerical² Keyboard for any app
  • Equation editing
  • Customizable themes
Features
Read full description

Numerical³ is still the calculator without equal. The first Numerical shipped in 2014—v3 brings long-requested improvements and the same focus on delightful, minimalist utility apps.MAC TOONumerical runs natively on macOS: multiple windows, tabs, resizing, desktop widgets, full keyboard support, and synced history. Download it on the Mac App Store.WIDGETSLock screen and Home Screen widgets—modernized on iPhone and iPad.THEMESBrand-new neo-morphic themes alongside our most popular picks—each with light and dark variants that follow your iOS appearance settings. Use the Theme Picker to preview them all.ICONSTheme Home Screen icons match iOS 26 with glass effects, Dark Mode, and tints.HISTORYYour equations stay visible on screen—above the keyboard on iPhone (portrait) and to the side on iPad and Mac. iCloud keeps history in sync across iPhone, iPad, and Mac.KEYBOARDSExternal keyboards are fully supported on iPhone, iPad, and macOS—including the shortcuts you expect.SOUND FXSounds and clicky feedback on iPhone, iPad, and Mac. Haptics on iPhone.14+ LANGUAGESThe entire app is localized in 14+ languages—including Japanese, Chinese, Korean, and Russian—with international digits and formats. Missing yours? Let us know.Mana Machines—Numerical³ and upcoming apps from a studio focused on delightful, minimal, human-centered utilities. More on the way.Questions or feedback: manamachineventures@gmail.comDeveloped by Andrew J Clark. Designed by Andrew J Clark & Alex Vanderzon. Terms of Use: https://www.manamachineventures.com/terms

About

Promise

Features
Read full description

Promise Alarm helps you wake up with a reminder that matters. Instead of waking up to a generic alarm tone, record your own voice with the promises and goals you made to yourself. Whether it's a commitment to wake up early, study, exercise, or build better habits, your own words become your motivation every morning. Features: • Record your own motivational alarm messages • Create and manage alarms easily • Repeat alarms on selected days • Customize snooze duration • Simple, clean, distraction-free design • Reliable alarm experience Your voice is more powerful than any ringtone. Wake up with purpose. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://promise.eslamelsadawy.com/

Screenshots

Numerical³4 screens
Promise3 screens

Verdict

The call

The clearest difference is in-app purchases: Numerical³ at none against Promise's 2. Numerical³ also leads on device support (3 vs 1) and iOS requirement (18.0 vs 26.0). On price, update cadence 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. Promise sells 2 in-app purchases, starting at $2.99 per month. Numerical³ asks for nothing beyond the download.

UpkeepUpdate frequency

Numerical³ ships an update every 2 weeks, Promise every 3 weeks. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Numerical³ versus Promise: the parameters behind the verdict, then further details
ParameterNumerical³Promise
PriceFreeFree
Rating4.8 (1.3K ratings) — better—
Positive reviews74.9% of reviews—
Number of ratings1.3K — better—
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, Mac — betteriPhone
Requires iOS18.0 — better26.0
Further details — not scored
Size175 MB54 MB
Age rating4+4+
DeveloperAndrew J ClarkEslam Elsadawy

Bugs and requests

Numerical³

Reported bugs

3 issues
  • Unresponsive keys
  • Calculation errors
  • Crashes on startup

Requested features

5 requests
  • Add scientific functions (square root, trigonometry, etc.)
  • Implement an equals button
  • Add more theme options
  • Develop an iPad version
  • Bring back widget support

Promise

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Numerical³

No in-app purchases

2 purchases

Promise

Subscriptions2
  • Promise Alarm Pro Monthly$2.991 Month
  • Promise Alarm Pro Yearly$9.991 Year

Questions

Is Numerical³ free?
Numerical³ is free to download, with no in-app purchases.
Is Promise free?
Promise is free to download, with in-app purchases available.
Do Numerical³ or Promise have ads?
Neither Numerical³ nor Promise shows ads.
Which is updated more often, Numerical³ or Promise?
Numerical³ ships an update every 2 weeks, and Promise every 3 weeks. Most recently, Numerical³ was updated on October 30, 2026 and Promise on October 25, 2026.

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