Math assistant
for iPhone and iPad
Every formula you need. In your pocket.
225 ready-made formulas, a builder for your own, and a voice mode that calculates without touching the screen. All inside your iPhone — offline, no account.
Free. Requires iOS or iPadOS 18.
225
built-in formulas
11
categories
10
languages
0
data collected
Voice mode
Say it out loud. It's already done.
Tap the microphone and ask for a formula by name. Vuelto finds it, asks you for each value and gives you the result. Hands full, at the counter, or on site.
- It recognises the formula even when you word it differently.
- Optional spoken assistant reads the values and the result aloud.
- You can type instead, if the keyboard suits you better.
Library
225 formulas, sorted the way you think.
From tips and till change to compound interest, body mass index or the ideal gas law. Star your favourites and they stay one tap away.
Your formulas
If your calculation doesn't exist, write it.
An editor built for one thumb: letters and numbers share the same slot, 49 symbols one tap away, and several lines to chain results. Test it before you save it.
- Named variables — not stray letters you won't recognise later.
- Operators, functions, lists and constants across four tabs.
- They sit beside the rest, ready for voice mode too.
Result
Not just the number. The path.
Every calculation is laid out step by step, with the values you entered and what it did with them. The last result stays at hand to chain into the next one.
- A calculator keypad of its own, with decimals and percentages.
- The change formula suggests which bills and coins to hand back.
- History kept on the device, grouped by formula.
iPad
The same app, with room to breathe.
On iPad the content fills the height and centres into a comfortable column. Your formulas and favourites travel through iCloud between your devices, at no cost.
Privacy
Your numbers are none of our business.
Vuelto has no accounts, no ads, no analytics and no servers of its own. There is nothing to collect, because the app sends nothing anywhere.
History never syncs
The values you type and the results are kept in a separate store that never leaves the iPhone — not even with Vuelto Pro.
Formulas and favourites only
They sync in your private iCloud, tied to your Apple Account. The developer cannot see or recover any of it.
“Data Not Collected”
That's the App Store declaration. No IDFA, no third-party SDKs, and no tracking permission prompt.
Pricing
Start free. Pay once, if it earns it.
No subscription, no renewals and no recurring charges. Vuelto Pro is a one-time purchase tied to your Apple Account.
Free
0
Forever, no account
- A share of every category (~40%)
- The change formula, always
- Up to 3 formulas of your own
- Voice mode and history
- iCloud syncing
Vuelto Pro
One-time
Your country's price is shown by the App Store
- All 225 formulas, unlocked
- Unlimited formulas of your own
- Everything in the free version
- No subscription: paid once
- Restorable on your devices
Support
Something not adding up? Write to us.
There is a person behind Vuelto, not an automated form. Tell us what you need and we will reply by email, usually within 48 hours.
If you prefer plain email: support@indielob.com