The Fossil (also sold as the Abacus) Wrist PDA was actually a full-featured but miniaturised version of older Palm pocket computer. It even has the same screen resolution.
This particular Fossil Wrist PDA smartwatch is the model 2.0 from about 2004. I have got this one for a cheap but is is a bit weared and the Back button is damaged (so it is impossible to switch the programs). It was also necessary to replace the battery (compatible bateries are available for modern sporttesters).
It’s passive black-and-white display seemed to be obsolete when it was introduced (the comparable Palm PDA computers – Palm III, V and the m500 lines were from 1998-2000.
Its main problems were (and still are) moderate battery life (1-3 days) and its weight (over 100 grams – a comparable PDA was about 180 grams). They also aren’t water resistant. The 1″ screen is also not optimal for many users (there is a mode with bigger icons – only 4 can be shown – but the rest of probrams has still the same size).
There are other issues – the integrated stylus is very small and it is uneasy to target the UI elements (menus, buttons) with it. Also the calibration procedure requires a lot of precision and patience. But the writing itself is not that hard as one can use whole screen area to enter Graffiti characters (so the actual writing area is not much smaller than on an usual Palm device).
Anyway, it offers to have a complete Palm-compatible PDA on the wrist. It supports Graffiti data input, most of Palm OS applications. The stylus is included, of course (it’s hidden in the belt). Obviously, there are some limitations: unavailability of some standard hardware and software buttons – so one cannot control some programs and cannot even open the program menu – it’s a case of the CSpotRun.
But there are rich (for it’s time) connection options: miniUSB connector (both for charging and data transfer) and infrared port – thus one can exchange data (and even applications!) with other Palm devices (and not obly with them) without any trouble.
In comparison with modern smartwatch stuff it is not so bad: it has better than average battery life and it is actually a full computer with ability to locally store data (calendar items, contacts, passwords,…) and create and edit them. It probably still can be synchronised with computers (at least with Linux ones as it is long unsupported on the Windows platform).
I normally use the Pebble smartwatch which has much better screen, is is lighter and has extreme battery life. But is’s mostly for reading only (it has no easy way to enter/edit data or to store them locally). As I don’t use connection between the Pebble and the smartphone, this old Fossil can be better for me in many cases. But I need to address it’s technical problems first (well, I have to find a way how to repair it’s buttons…).