OnePlus Watch 3 vs Casio Pro Trek Smart WSD-F20A
At $329 and $399, the OnePlus Watch 3 and Casio Pro Trek Smart WSD-F20A sit close enough in price to be genuine alternatives — here's how they actually compare.
The OnePlus Watch 3 brings a 1.5" display, 16 days of typical battery life, built-in GPS to the table.
Global reference price
The Casio Pro Trek Smart WSD-F20A offers a 1.32" display, 1 day of typical battery life, built-in GPS.
Global reference price
Specification Comparison
Key Differences
The OnePlus Watch 3 lasts noticeably longer between charges — 16 days versus 1 — which matters most for multi-day trips or anyone who dislikes daily charging routines. Screen size also favors the OnePlus Watch 3, at 1.5" versus the Casio Pro Trek Smart WSD-F20A's 1.32", making it easier to read notifications and metrics at a glance.
Pros & Cons
OnePlus Watch 3
Pros
- Much longer battery life (16 days)
- Larger 1.5" display
- Lower price
- Built-in GPS
Cons
- No significant weakness versus the alternative at this price
Casio Pro Trek Smart WSD-F20A
Pros
- Built-in GPS
Cons
- Shorter battery life (1 days)
- Smaller 1.32" display
- Costs a bit more
Which One Is Right For You?
- OnePlus Watch 3: A good fit for buyers who wants to charge as infrequently as possible, prefers a larger, easier-to-read display and wants to spend a little less.
- Casio Pro Trek Smart WSD-F20A: Makes the most sense for anyone who prefers Casio's ecosystem and design.
Conclusion
Neither watch is a strict downgrade from the other — each wins on a different practical dimension, so the right pick depends on which of those matters more day to day.
Summary
OnePlus Watch 3
Strengths
- Much longer battery life (16 days)
- Larger 1.5" display
- Lower price
- Built-in GPS
Weaknesses
- No significant weakness versus the alternative at this price
Casio Pro Trek Smart WSD-F20A
Strengths
- Built-in GPS
Weaknesses
- Shorter battery life (1 days)
- Smaller 1.32" display
- Costs a bit more
There's no universal winner here — match the pick to whichever tradeoff (battery life, screen, or connectivity) actually applies to daily use.