Accessibility, for every student.

Trident Calculator. Last updated October 2026.

We want every student to be able to use Trident, including students who use screen readers, keyboards, switch control, zoom or high-contrast settings.

What works today

• Every calculator key and control has a spoken name. Results are read aloud by screen readers (VoiceOver, TalkBack, ChromeVox, NVDA, JAWS).
• You can use the whole calculator from a physical keyboard. Focus is always visible.
• There is a high-contrast skin, plus light, dark and system appearance.
• Text and controls scale with browser zoom and system text size.
• The app is in 15 languages, with a right-to-left layout for Arabic.
• No time limits, except an optional timer that you start yourself in exam practice.

Known gaps

• Calculator screens are drawn as images. Screen readers hear the current result, but not the full two-dimensional layout of a graph or matrix.
• Graphs have no text or audio description yet. The Table view lists the values meanwhile.
• Some decorative skins have low-contrast screen text. The high-contrast skin avoids this.
• The 3D shape viewer needs touch or a mouse to rotate.
• We have not had an independent audit yet.

Tell us

If something gets in your way, email support@sviewstudios.com or use the support form. Tell us your device, browser or app version, and what happened. We aim to reply within five school days.

Trident CalculatorOpen the web appSupportPrivacyAccessibilityFor schools

Not affiliated with any calculator manufacturer. Not approved for use in exams.