The timeline
The home page lists 86 landmark gadgets, newest first, from the Apple Vision Pro back to the Kodak camera. Search by name or year, or tap a decade in the chart to jump there. Dates are the first public release or first demonstration; where a product launched in one country first, that date is used.
The size comparisons
Spec sheets tell you a gadget is 195 × 195 × 47.5 mm. That means very little until you put it next to something you already know the size of — so this site draws gadgets as 3D objects at true scale, side by side.
Each category page opens with the newest few gadgets in the scene and lists every model in that category underneath. Add or remove anything from the table, orbit the scene, and switch between millimetres and inches. Compare sizes does the same across all 715 gadgets in 136 categories.
Where the numbers come from
Dimensions and weights are the manufacturer's published figures, collected from tldevtech.com and parsed into width, depth and height. Where a spec sheet is ambiguous about which figure is which, the site follows the usual convention of width × depth × height unless the source labels the axes. The exact string the manufacturer published is always shown in the table so you can check it yourself.
A handful of gadgets have no usable dimensions published yet — they stay in the table but cannot be drawn.