bosusoft · small tools, no fuss

Type a number in.
Get your answer.
That's it.

Bosusoft builds free mobile tools for the everyday math you don't want to do by hand — your BMI, the tip on dinner, or how many you've counted so far.

Browse the apps

3apps, one for each everyday number

freeto start, no sign-up

3.4★on Google Play

Tippify bill split

Bill total$64.00

Tip18%

Split between3 people

EACH PERSON PAYS $0.00

the family

Three apps. Three everyday numbers.

Each app answers one question you actually ask yourself. No accounts, no clutter — just the number you came for.

BMI Calculator

Enter your height, weight, age and sex to get your Body Mass Index and what it means for your health.

health & fitness3.4★

Get BMI Calculator

Tippify

Calculate the tip and split the bill in seconds. Set your percentage, add people, done.

toolsbill splitting

Get Tippify

Kazoeru

A tally counter for anything you need to count. Keep several counters going at once, laid out in a grid.

toolstally counter

Get Kazoeru

why bosusoft

Built the same way, on purpose.

We keep every app small so it can stay fast, free, and honest about what it does.

✓One job, done well

No app tries to be everything. Open it, get your number, get on with your day.

✓Free, no account

Every app is free to use, with no sign-up and nothing to remember a password for. Kazoeru also offers an optional one-time Pro upgrade.

✓Small on purpose

Light, fast installs that open instantly — no bloated download for a simple calculator.

Pick the tool for the number you need.

All three are free on Google Play. No card, no sign-up. More apps are on the way.