Using the app

What Trident Pro adds, and how to get it

Pro unlocks the financial and advanced models, premium skins, the Pro labs, notebook saving and unlimited step-by-step explanations.

Open in Trident

The core calculators are free. Pro is for the extras. Trident has no ads and no tracking, and buying Pro supports that.

1. Anything that needs Pro is marked PRO. Pro calculators open as a preview with a worked example and 20 free key presses a day; tap Unlock on the calculator screen to see the Trident Pro screen. Other Pro features open the Trident Pro screen and tell you why.
2. You can also open Settings and tap Upgrade under Trident Pro.
3. On an iPhone or iPad choose a plan (Monthly, Yearly or Lifetime) and tap Continue. Subscriptions renew until cancelled.
4. On the web, the purchase is a one-time payment that unlocks Pro in up to 3 browsers. After paying, your license key arrives by email. Paste it in Settings to unlock Pro.
5. Already bought Pro on your phone? See the restore purchases guide and the web pass guide.
6. When Pro is on, Settings shows "Pro is active".

Tips

• Pro includes: the financial and advanced calculator models (Classic Financial II, RPN Financial 12, RPN Advanced 42, Classic CAS, RPN Power 48), premium skins (Ocean, Sunset, Mint), the Pro labs, editing more than 3 notebook cells and saving or exporting notebooks, and unlimited step-by-step explanations (3 a day are free).
• Verified teachers get Pro free. See the class links guide.

Related guides

• Restore a Pro purchase on a new deviceGot a new phone or reinstalled the app? Restore brings your Pro purchase back without paying again.
• Use Pro on the web with a pass codeTurn your iPhone or iPad Pro purchase into a pass code that unlocks Pro on the Trident website, in up to 3 browsers.
• Get a step-by-step explanationSee how an equation, fraction, derivative or integral is worked out, one step at a time, from the History panel.