Garmin Forerunner 70 vs Polar Street X
Garmin Forerunner 70 (2026, listed at $249) and Polar Street X (2026, listed at $249.99) are both sport watches, so the choice comes down to specifics.
Specs last updated · table prices are list prices; each card shows Amazon's current price when available
Garmin Forerunner 70
Garmin's entry-level AMOLED runner: built-in GPS, adaptive Garmin Coach plans with run/walk options and about 13 days per charge, with no music or maps.
Polar Street X
Urban sports watch: 1.28-inch AMOLED, MIL-STD-810H build, GPS with route guidance, an LED flashlight and up to 10 days (42 hours of GPS training).
The verdict
On the numbers we track, Garmin Forerunner 70 wins on battery life (13 days vs 10 days), weight (40 g vs 48 g), price ($249 vs $249.99) and tracked features (4 vs 3).
Bottom line: on raw specs the Garmin Forerunner 70 leads 4 to 0, but five spec categories are only a starting point. Match it to your phone, your main sport and your budget before you decide, or run the free quiz to see how each ranks for your answers.
Spec by spec
| Spec | Garmin Forerunner 70 | Polar Street X |
|---|---|---|
| Battery (rated) | 13 days | 10 days |
| Weight | 40 g | 48 g |
| List price | $249 | $249.99 |
| Water rating | 5ATM | 5ATM |
| Tracked features | 4 | 3 |
| Case size | 43 mm | 45 mm |
| Display | AMOLED | AMOLED |
| Works with | both iPhone and Android | both iPhone and Android |
| Listed best for | running | running, gym and strength work and everyday wellness |
| Released | 2026 | 2026 |
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
- AMOLED display
- swim tracking
Only Garmin Forerunner 70 (1)
- blood-oxygen (SpO₂)
Only Polar Street X (0)
Nothing unique.
Which one should you pick?
Pick the Garmin Forerunner 70 if…
- You want to spend less: it lists for $0.99 less.
- You want fewer charges: about 13 days per charge vs 10 days.
- You want a lighter watch: 40 g vs 48 g.
- You need blood-oxygen (SpO₂), which the Polar Street X does not list.
- You might switch phones: it works with both iPhone and Android, the Polar Street X only works with Android.
Skip it if…
- • You want to pay from your wrist — it has no contactless payments.
Pick the Polar Street X if…
- Your main use is gym and strength work and everyday wellness: it is listed for that and the Garmin Forerunner 70 is not.
- You might switch phones: it works with both iPhone and Android, the Garmin Forerunner 70 only works with Android.
Skip it if…
- • You want to pay from your wrist — it has no contactless payments.
Frequently asked questions
Which has better battery life, the Garmin Forerunner 70 or the Polar Street X?
The Garmin Forerunner 70 has the longer rated battery life: about 13 days per charge against 10 days. These are manufacturer ratings; heavy GPS, always-on display and cellular use will cut both.
Which is cheaper, the Garmin Forerunner 70 or the Polar Street X?
The Garmin Forerunner 70 has the lower list price: $249 against $249.99 in our database. List prices change often, so check Amazon for today's price.
Do the Garmin Forerunner 70 and Polar Street X work with iPhone and Android?
Yes, they have the same phone support: both iPhone and Android.
Which is better for swimming, the Garmin Forerunner 70 or the Polar Street X?
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.
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
Garmin Forerunner 70
It is not the top pick for any standard quiz profile.