chtiCalc is a freeware proposing an ergonomic computer, integrating a converter of rate and a bill-poster net of tax/with tax.

Its innovating interface, typical of the chtiSoft software (usable without stylet, with the finger), improves ergonomics and makes it possible to accelerate the seizure in any circumstance.

Since the v1.11 version, chtiCalc is available on Landscape mode Pocket.