Still Copying and Pasting After a Calculation? Jisuan Wants to Remove That Extra Step
Starting with a single amount field in a quote, Jisuan brings calculations into Chrome web inputs. Templates and personal constants preserve familiar methods so the work can continue where it started.
When filling out a quote, sometimes all it takes to interrupt your work is an empty amount field.
The numbers are right in front of you: a unit price, a quantity and a delivery charge. You know how to work it out, but you still open a calculator, enter the numbers and copy the result back. Once that field is filled, another calculation comes along.
Each time takes only a moment, and the routine is familiar. Perhaps that familiarity is why we rarely ask: why should a calculation require leaving the place where we are entering information?
The Mac utility Jisuan (brand keyword: usejisuan) starts with this small question.
In Chrome web inputs that it supports, users can type an expression, press a keyboard shortcut, review the candidate results and confirm one to write it back into the current field. For example, entering “=36000+8500” produces 44,500.
The expression and the answer stay in the same place. For someone filling out a form, one fewer window switch also means one fewer interruption to their attention.
Keep calculations close and save the work you repeat
When trying a productivity tool for the first time, people usually focus on how many steps it saves. After a while, another question emerges: why do we have to reconstruct today the same calculation we worked through yesterday?
A service quote may always consist of working hours, an hourly rate and a fixed fee. An order quantity may repeatedly require converting a number of cartons into individual items. The numbers change, but the relationship between them often stays the same.
Jisuan lets users save these relationships as templates and store frequently used values as personal constants. Next time, they can open a template, enter the current parameters and choose the result they want to write back.
That gives a calculation value beyond its immediate answer. Users keep not just a result, but a method they can use again.
For people who keep formulas in notes or search old spreadsheets for a calculation method, the difference is practical: familiar calculations have a consistent home and an explicit set of rules to check against.
The answer appears but the decision remains yours
Convenience does not mean automating every action.
Jisuan follows a sequence of candidate results, user confirmation and write-back. Once a result appears, the user can check it and decide whether to put it into the current field. The tool does not submit web forms on the user’s behalf.
It currently supports standard HTML text inputs in Chrome on macOS that can be recognized through system accessibility. Web-based spreadsheets and other complex input areas are outside its supported scope. Its focus is work already taking place in a web page that is regularly interrupted by a small calculation.
Sometimes a tool’s value lies in not making people reorganize their work around it.
The form stays the same, and the quote remains the user’s decision. Jisuan simply brings calculation a little closer and saves methods that are used repeatedly, so people can get on with the task at hand.
Jisuan — Calculate right where you type.