OnePlus Watch 3 vs Polar Ignite 3
OnePlus Watch 3 (2025, listed at $329) and Polar Ignite 3 (2022, listed at $329) are both smartwatches, so the choice comes down to specifics.
Specs last updated · prices are list prices
OnePlus Watch 3
Wear OS 5 with Snapdragon W5 + BES2800 dual chips — 5-day smart battery and 16-day power-saver.
Polar Ignite 3
Fitness watch with sleep-driven daily energy guidance and a vivid always-on AMOLED.
The verdict
On the numbers we track, OnePlus Watch 3 wins on tracked features (6 vs 3); Polar Ignite 3 wins on weight (35 g vs 49 g).
Check your phone first. The OnePlus Watch 3 works with Android only; the Polar Ignite 3 works with both iPhone and Android. A watch that does not pair with your phone is not an option however good its specs are.
Bottom line: there is no clear winner on specs (1 to 1). Decide on phone support, how often you are willing to charge, your main sport and your budget, or run the free quiz to see how each ranks for your answers.
Spec by spec
| Spec | OnePlus Watch 3 | Polar Ignite 3 |
|---|---|---|
| Battery (rated) | 5 days | 5 days |
| Weight | 49 g | 35 g |
| List price | $329 | $329 |
| Water rating | 5ATM | 5ATM |
| Tracked features | 6 | 3 |
| Case size | 47 mm | 43 mm |
| Display | AMOLED | AMOLED |
| Works with | Android only | both iPhone and Android |
| Listed best for | everyday wellness, health tracking and running | everyday wellness, running and health tracking |
| Released | 2025 | 2022 |
Trophy marks the better value on the five measurable specs. Battery is the manufacturer's rating, not our test. How we score is on the methodology page.
Feature overlap
Both have (3)
- built-in GPS
- blood-oxygen (SpO₂)
- AMOLED display
Only OnePlus Watch 3 (3)
- ECG
- on-device music
- swim tracking
Only Polar Ignite 3 (0)
Nothing unique.
Which one should you pick?
Pick the OnePlus Watch 3 if…
- You need ECG, on-device music and swim tracking, which the Polar Ignite 3 does not list.
- You want the newer model (2025 vs 2022).
Skip it if…
- • You use an iPhone — it needs an Android phone for full features.
- • You have a small wrist (under about 160 mm) — the 47 mm case we list is large (check whether a smaller size is sold).
Pick the Polar Ignite 3 if…
- You want a lighter watch: 35 g vs 49 g.
- You use an Android phone: the OnePlus Watch 3 does not pair with it.
Frequently asked questions
Which has better battery life, the OnePlus Watch 3 or the Polar Ignite 3?
They are rated the same, at about 5 days per charge. Real-world life depends on GPS, display and cellular use.
Which is cheaper, the OnePlus Watch 3 or the Polar Ignite 3?
They have the same list price ($329) in our database. Check Amazon for today's price.
Do the OnePlus Watch 3 and Polar Ignite 3 work with iPhone and Android?
Check your phone first. The OnePlus Watch 3 works with Android only; the Polar Ignite 3 works with both iPhone and Android. A watch that does not pair with your phone is not an option however good its specs are.
Which is better for swimming, the OnePlus Watch 3 or the Polar Ignite 3?
Neither has an edge on water rating: both are rated 5ATM. 5ATM is suitable for showering and pool swimming, but not for high-speed water sports or diving. Only the OnePlus Watch 3 has a dedicated swim-tracking mode in our data.
Not sure either is right for you?
Nine questions about your phone, sport, wrist and budget, scored against all of our watches with the reasoning shown.
Take the free quizWhere each one ranks #1 in our quiz
OnePlus Watch 3
Polar Ignite 3
It is not the top pick for any standard quiz profile.