v1 · now on iPhone
Math, the way
you think.
A notepad calculator for iPhone. Type expressions in plain English and watch the answer appear beside every line.
Free · no ads · no subscription01 — Examples
Four ways people actually use it.
Monthly budget
Every number has a name.
Assign values to variables, reuse them anywhere, and let Pebbl keep the math in your head out of your head.
Cooking & baking
Bakers’ percentages, without the spreadsheet.
Hydration, ratios, oven temps across units. Change the flour weight and every derived quantity updates with it.
Travel
Currencies and units, in the language you think in.
Live exchange rates cached for offline. Type "10 km to miles" or "30 °C to °F" — no menus, no mode switches.
Home renovation
Areas, materials, waste factor.
Multiply dimensions, convert between metric and imperial, add a 10% overage. Keep the plan in one document.
02 — Cheat sheet
The whole syntax, in one page.
There are no menus, no modes. You type what you mean. If it reads like English, it probably works.
Arithmetic
1,200 + 4501,650
150 * 1.08162
2^101,024
sqrt(144)12
Variables
salary = 5,2005,200
rent = 1,8501,850
salary - rent3,350
sum— all above
Percentages
18% of 8415.12
120 + 15%138
25% off 320240
40 as % of 20020%
Units
5 km in miles3.11 mi
180 cm to ft5.91 ft
2 hours in minutes120 min
500 g to oz17.64 oz
Currency
100 USD in EUR92.18 EUR
2,500 JPY in USD$16.08
50 GBP + 30 EUR91.47 USD
500 EUR to USD$542.50
Scientific
sin(pi / 2)1
log(1000)3
fact(5)120
0xff in binary1111 1111
03 — Pricing
Zero dollars. Always.
No account. No analytics. No tracking. No ads. No subscription. Documents stay on your device.
$0
price, forever
0
accounts required
0
trackers
100%
on-device