Since this review, Converti has been updated to show 24 units per screen on the Revo, as the screenshot above shows.

A Personal Digital Assistant like the Revo is designed to be taken everywhere, so it's a perfect platform for unit conversion tools - and there are plenty available for the Series 5/5mx, but at the time of writing Guillaume Dupont's Converti is the only freeware tool I know of which has come over to the Revo.

When Converti starts it displays a splash screen for a few seconds, and then takes a few seconds longer to load all of the conversion units. The splash screen also appears often when you switch to Converti, which I wish it wouldn't do - it can be cancelled early by pressing a key, but not by tapping the screen (which would make it less of a problem).

Converti comes supplied with several pages of units, in the categories length, weight, area, speed, volume, time and pressure. When a value is assigned to one of the units in a category, it is converted into all of that category's other units, which is more convenient than only converting from one unit into another. Always displayed are degrees Celcius and Fahrenheit for temperature conversion.

You can add your own categories and units, and each unit has to be relative to just one other unit, so triangulation must be used by the program to fill in all the conversions for the other units.

This program is deliberately not an easy option for currency conversion, due to its inability to update unit conversion rates without deleting and re-creating the units. It's okay for rough estimates, but for more accurate conversion you'll need to buy Guillaume's shareware Monnaie software.

Converti has a few other nice features - a small numerical pallet is displayed so that you can convert without using the keyboard (a special Revo-only feature), simple calculations can be executed in the data entry line and the program can be set up to copy converted values automatically.

All taken into account, Converti is quite useful to have on your Revo if you are likely to have to do any conversions (provided they are not involving currency) and, like all programs reviewed, is free and so can be forgiven many of its downfalls.