Seiko Built a Smartwatch That Ran Apps in 2000. Apple Waited 15 Years to Do the Same Thing.

Seiko Ruputer

Seiko Epson • $399 (2000)

Origin Technology (1982)

Calculator watch

Future Angle

Modern smartwatches still haven't achieved the Ruputer's vision of a true wrist computer — they remain phone accessories

Key Takeaways

• •Seiko Ruputer (1998 Japan / 2000 international): 16-bit Hitachi CPU, 128x64 touchscreen, 2MB flash, downloadable apps
• •Sold as 'OnHand PC' outside Japan — $399 ($700 in 2026 dollars)
• •Seiko had been making wrist computers since 1982 — 18 years of iteration before Ruputer
• •Apple Watch launched in 2015 and sold 4.2M units in Q1 — Ruputer never hit mainstream

Timeline

In 1998, Seiko released the Ruputer in Japan. It was a watch with a 16-bit Hitachi SH7032 processor running at 13.5 MHz, a 128x64 pixel touchscreen, 2 MB of flash storage, and 512 KB of RAM. It ran a custom real-time operating system. It had downloadable apps — games, utilities, data managers. It synced with PCs via a serial cable. It was, by any reasonable definition, a smartwatch.

This was 15 years before the Pebble Kickstarter and 17 years before the Apple Watch.

The Ruputer (released internationally in 2000 as the 'OnHand PC') wasn't Seiko's first wrist computer. That distinction belongs to the Data-2000, released in 1982 — the first watch that could store external data, entered via a miniature docking keyboard. Seiko followed it with the RC-1000 in 1984 (the first watch to connect to a personal computer), and the UC-2000 in 1984 (which came with a tiny QWERTY keyboard you strapped to your forearm).

The Ruputer had a 16-bit CPU, a touchscreen, and downloadable apps on your wrist. In the year 2000. It was the smartphone of watches — and just as ignored as the IBM Simon.

By the time the Ruputer arrived, Seiko had been iterating on wrist computers for 18 years. The device was sophisticated: a stylus-driven touchscreen interface, an app ecosystem with third-party developer support, barcode scanning via optional modules, and PC synchronization for contacts and calendars.

But the Ruputer cost $399 — equivalent to about $700 today. Its monochrome display was hard to read in sunlight. The battery lasted about 30 hours under normal use. And crucially, it didn't solve a problem that justified wearing a computer on your wrist. It was a gadget for enthusiasts, not a tool for everyone.

The same fate had befallen every wrist computer before it. The Timex Datalink (1994) could sync data from a PC by holding the watch up to a flashing monitor — clever, but niche. Microsoft's SPOT watches (2004) received FM radio data — news, weather, stock quotes — but required a $59/year subscription for information you could get free on your phone.

The breakthrough came when smartwatches stopped trying to be wrist computers and started being health devices. Fitbit (2009) proved people would wear technology if it tracked their steps and sleep. Pebble (2013) proved people wanted notifications on their wrist. Apple Watch (2015) combined both — and added heart rate monitoring, fall detection, and ECG.

Apple sold 4.2 million watches in its first quarter. Not because it was the first smartwatch — Seiko beat it by 17 years — but because it was the first smartwatch that solved a clear problem: keeping you connected and healthy without pulling out your phone.

The Ruputer sits in a strange place in tech history — too advanced for its time, too niche for mass adoption, and too obscure for recognition. Seiko proved the concept. Apple proved the market.

How did this make you feel?

Recommended Gear

Keep Reading

History

LG Built a $20,000 Fridge That Could Send Email. Nobody Wanted It.

5 min read

History

THAAD Hits Missiles at Mach 8 With No Warhead. The Root Goes Back to a 1954 Anti-Aircraft Missile Called Nike.

9 min read

Gadgets

Smart Glasses Are About to Replace Your Phone. The Root Goes Back to a 13th-Century Italian Monk.

7 min read