Free offline calculator for iPhone

Change a number.
Keep your working.

Xidents Calc is a free offline iPhone calculator with editable expressions, saved history, scientific tools and time calculations. Change a number without starting over, keep useful results with notes, and add hours and minutes directly. No ads or account needed.

Explore the calculator See it in action ↓

Coming soon to the App Store · iOS 18 or later

Xidents Calc showing the editable expression 1,250 + 187.5 and live result 1,437.5.

Change the expression.See the answer update.

✓ Works offline✓ No advertisements✓ No account needed✓ No in-app analytics

Made for the way you work

Change it. Remember it.
Use it again.

01 / KEEP THINKING

Edit without
starting over.

A price changes or you spot a typo. Tap into your expression, edit just that number and see the answer update. Keep the rest of your working, with Undo there when you need it.

1,250 + 200 = 1,450

02 / RETURN TO IT

Remember what
the number meant.

Save a calculation with a note such as “Weekend project materials”. Pin it for later, find it by its note, and reopen the expression when the figures change.

A useful answer, with its context.

03 / MAKE TIME ADD UP

Hours and minutes.
No mental conversion.

Add two work sessions or total a few tasks. Enter hours, minutes and seconds directly instead of converting them to decimals first.

2h50m + 30m = 3h20m

A closer look

See what you can
do with it.

From revising a total to finding a saved project cost: see the app doing the work.

Edited expression showing 1,250 + 200 = 1,450. — **Change just the amount.**Replace 187.5 with 200. Your original 1,250 stays in place, and the result updates to 1,450.

History showing a pinned 85 × 4 = 340 calculation with the note Weekend project materials. — **Find the project, not just the number.**A note gives your calculation meaning. Pin it so it stays easy to return to.

Time mode displaying 2h50m + 30m = 3h20m. — **Add up your time.**A 2h50m session plus another 30m gives 3h20m. No decimal conversion needed.

When you need to go further

More tools.
The same calculator.

Four ways to calculate

Switch between Basic, Scientific, Time and Bases. Use BIN, OCT, DEC and HEX with bit operations when the task calls for them.

Percentages with context

Choose from three percentage methods in Settings. Adjustment amounts help you see what was added or subtracted, alongside the result.

Scientific tools, close at hand

Work with powers, roots and scientific functions. Choose degrees or radians, and use degrees, minutes and seconds for angles.

Your rules, your display

Choose standard precedence or left-to-right arithmetic. Adjust rounding, scientific notation and trailing zeros to suit your working.

Correct slips as you go

Hold Delete to erase several characters. Undo an edit, group terms in parentheses, or continue calculating from your previous answer.

Make it comfortable

Choose light or dark appearance and a keypad you can feel with each tap. Turn vibration off whenever you prefer.

Fewer interruptions

Open it.
Get on with it.

Calculate offline, without advertisements or an account. Your working and history stay in the app on your iPhone. The free edition has no in-app analytics.

Read the privacy policy ↗

Calculator by Xidents

For calculations
worth coming back to.

Free edition. Coming soon for iPhone.

Explore tips and help ↗Contact Xidents Support

Change a number.Keep your working.

Change it. Remember it.Use it again.

Edit withoutstarting over.

Remember whatthe number meant.

Hours and minutes.No mental conversion.

See what you cando with it.

More tools.The same calculator.