DuoDiscover
Numerical³
Minimalist calculator with themes, widgets and synced history
Numerical³ is adapted for iPhone Duo (rebuilt with the iOS 27 SDK or later to fill the inner display) as of .
About this app
Numerical³ is the third major version of Numerical, a minimalist calculator first released in 2014 by Andrew J Clark under the Mana Machines name. It keeps your equations on screen as you work, above the keypad on an iPhone in portrait and alongside it on iPad and Mac, and iCloud syncs that history across devices. The app offers a set of themes, including neo-morphic designs, each with light and dark variants that follow the system appearance, and matching Home Screen icons. There are Lock Screen and Home Screen widgets, full external keyboard support with familiar shortcuts, optional sounds, and haptics on iPhone. The app is localized into more than 14 languages with local digits and number formats, and a native Mac version runs with multiple windows and tabs. It is free to download and suits people who want a clean calculator rather than a scientific one. Version 3.0.16, released on October 17, 2026, lists being optimized for iPhone Duo alongside performance improvements.
Features
- Equation history kept on screen, synced with iCloud
- Themes with light and dark variants
- Lock Screen and Home Screen widgets
- External keyboard support with shortcuts
- Optional sound effects and haptics
- Localized in 14+ languages
How it uses iPhone Duo
The App Store release notes for Numerical³ version 3.0.16, dated October 17, 2026, say the app is "Optimized for iPhone Duo". The notes do not describe fold-specific features, so we list it as Adapted. DuoDiscover has not yet tested it on an iPhone Duo.
Compatibility
| Tier | Adapted |
|---|---|
| Uses the fold | No |
| Category | Utilities |
| Price | Free |
| Verified | · developer statement |
| Added |
What the tiers mean: Understanding iPhone Duo app compatibility ›
Developer
Numerical³ is developed by Andrew J Clark.
Official website: www.manamachineventures.com/apps/numerical
Get the app
Discuss Numerical³ in r/iPhoneduoapp ›
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Numerical³ on iPhone Duo: FAQ
Is Numerical³ optimized for iPhone Duo?
Partly. Numerical³ is Adapted: it was rebuilt with the iOS 27 SDK or later to fill the inner display, but does nothing specific with the fold. Verified on October 17, 2026 (developer statement).
What does Numerical³ look like on iPhone Duo unfolded and folded?
The App Store release notes for Numerical³ version 3.0.16, dated October 17, 2026, say the app is "Optimized for iPhone Duo". The notes do not describe fold-specific features, so we list it as Adapted.
How much does Numerical³ cost?
Numerical³ is free on the App Store.
