Using a Windows Mobile 2003 PDA (HP iPAQ h4350) in 2022, including WhatsApp
raymii.org
raymii.org
Indeed everything on this device (and pre-2010s computing in general) feels like it was designed to be a tool to serve its user rather than a distraction machine designed to waste the user's time. I miss those times.
EDIT: One of my ideas possibly side projects is to resurrect the WinCE 6.5 platform and build applications for it. Unfortunately the WinCE dev tools are not available anymore. But it is the best minimum viable smart phone platform: touchscreen, camera, external storage through SD/CF cards, audio/video recorder, music player, PIM installed, wireless (IrDA/wifi/etc), GPS, input from soft keyboard/local handwriting recognition, and built in terminal/file manager.
Shareware from back in the day nagged you to buy their software but once you did so they left you alone and the relationship between the developer and the user was still a friendly one with the incentives being aligned (the dev wants you to keep using the software and ideally get others to do so), so past the initial nag the software was generally trying to be as efficient as possible and not intentionally waste the user's time.
Nowadays, not only is there no way to pay to opt-out from the nagging but the advertising cancer has now contaminated a big part of the IT industry where entire products are build not with the objective to solve user's problems and get paid doing so but to provide an unefficient, half-baked solution to the problem as bait to get users to see ads and generate "engagement".
[1] https://web.archive.org/web/20010904215400/http://www.rainer...
[2] https://wiki.lazarus.freepascal.org/Windows_CE_Interface
The problem with using the camera and video hardware on these old devices is that they are just so slow to load up. Funny that the wifi connectivity and especially the IrDA port would outlast the 2G and 3G for support. I'll have to boot it up to very that the GPS works with CDMA (HTC TyTN II).
For using the keyboard and the general size being about a bar of soap it is easier to hold in the hand.
For getting more applications on the device there is yocto, but the hardware is the problem. Best to stick with wince.
Cellular is also a bit overrated unless you live in the exurbs/woods IMO. WiFi is ubiquitous now.