Garmin Enduro 4

Name: Garmin Enduro 4
Brand: Garmin
Price: 900 USD
Availability: InStock

Android; iPhone with limitsPaid tier: Garmin Connect+ECG app, FDA-cleared

Announced on October 6, 2026, Garmin's longest-lasting solar watch is rated at 36 days in smartwatch mode, 90 with solar, and up to 320 hours of activity recording in Extended Battery mode with sun. Compared with Enduro 3, Garmin cites 50% more RAM, faster map panning, grade-adjusted pace workouts and stamina zones. It weighs 66 g with its band despite a 51 mm case.

Approx. price

~$900

maker's list price, not a live price

Battery, smartwatch mode

36 days

the maker's headline

Battery, always-on display

not published

the maker gives no figure

Battery, GPS workout

3 days

maker's figure

Works with

Android; iPhone with limits

see the limits below

Weight

57 g

Garmin spec: '66 g (case only: 57 g)' with included band

Best for: An ultrarunner or multi-day hiker who would rather never think about charging

Battery: the claim and the other two figures

Claimed (smartwatch mode): 36 days
With always-on display: not published
GPS workout: 3 days

Headline: Garmin: 'Smartwatch: Up to 36 days/90 days with solar' (solar assumes 3 hours a day outside in 50,000 lux).
GPS: Garmin: 'Activity Mode (Normal): Up to 80 hours/144 hours with solar'; 'Activity Mode (Max Accuracy): Up to 60 hours/90 hours with solar'.
MIP screen is always visible, so Garmin gives no separate AOD figure; 'Activity Mode (Extended Battery)' 120 hours (320 with solar); 'Max Battery' 210 hours, unlimited with solar

The ring’s outer track is the headline claim; the inner two are the always-on and GPS figures as a share of it. An empty track means Garmin does not publish that figure. Why the figures differ

Phones, paid tier and updates

iPhone:: Yes, with limits.
Android:: Yes.; Garmin's spec table marks text replies and reject-call-with-text as Android only; iPhone owners get notifications but cannot reply from the watch
Paid tier:: Garmin Connect+, $69.99/year.; No watch feature requires it: Garmin's chart keeps activity details, health stats, performance metrics, Garmin Coach plans, courses and LiveTrack in the free app. Connect+ adds Active Intelligence AI insights, nutrition logging, a desktop performance dashboard, live activity on the phone, 3D maps and offline Garmin Trails downloads; Watch plus two years of Garmin Connect+: ~$1,040.
Software updates:: Garmin does not publish a guaranteed number of update years for this model.

Cleared health features

ECG app (FDA)FDA 510(k) K221774 'Garmin ECG App', Garmin International, cleared 01/12/2023 (electrocardiograph software for over-the-counter use; Garmin: records a Lead I-like ECG and detects AFib or normal sinus rhythm, adults 22+); Garmin lists 'Garmin ECG app' in this model's US spec table Source

A clearance says what a feature is allowed to claim, not that it replaces a doctor. Cleared versus wellness features

What the extra money buys: Against the Garmin Instinct E, the extra ~$650 buys dual-band GPS, full topo maps, music storage, a flashlight, contactless pay, more cleared health features, 59 h more GPS time and a longer headline battery (36 days vs 14 days). See the Garmin Instinct E.

Specifications

Approx. price: ~$900 (Enduro 4, 51 mm, $899.99 list on garmin.com/en-US/p/2032078 (announced 2026-10-06; add-to-cart not yet live on the page that day))
Type: Rugged outdoor
Platform: Garmin
Case sizes: 51 mm
Weight: 51 mm: 57 g (Garmin spec: '66 g (case only: 57 g)' with included band)
Battery, smartwatch mode: 36 days (Garmin: 'Smartwatch: Up to 36 days/90 days with solar' (solar assumes 3 hours a day outside in 50,000 lux))
Battery, always-on display: Not published by the maker
Battery, GPS workout: 3 days (Garmin: 'Activity Mode (Normal): Up to 80 hours/144 hours with solar'; 'Activity Mode (Max Accuracy): Up to 60 hours/90 hours with solar')
Battery note: MIP screen is always visible, so Garmin gives no separate AOD figure; 'Activity Mode (Extended Battery)' 120 hours (320 with solar); 'Max Battery' 210 hours, unlimited with solar
Works with: Android; iPhone with limits
iPhone: Yes, with limits
Android: Yes
Phone limits: Garmin's spec table marks text replies and reject-call-with-text as Android only; iPhone owners get notifications but cannot reply from the watch
Paid tier: Garmin Connect+, $69.99/year
What the paid tier gates: No watch feature requires it: Garmin's chart keeps activity details, health stats, performance metrics, Garmin Coach plans, courses and LiveTrack in the free app. Connect+ adds Active Intelligence AI insights, nutrition logging, a desktop performance dashboard, live activity on the phone, 3D maps and offline Garmin Trails downloads
Update years: Not published by the maker
Cleared health features: ECG app (FDA)
Display: MIP
Dual-band GPS: Yes
Maps: Full topo maps on the watch (Garmin: preloaded road and trail maps, ski resort maps, routable Cycle Map; 50% more RAM and 30% faster panning than Enduro 3 (Garmin))
Music on the watch: Yes
LTE: No LTE version
Contactless pay: Yes
Flashlight: Yes
Water rating: 10 ATM
Case: fiber-reinforced polymer with titanium bezel
Released: 2026

Features, per Garmin

Solar-charging 1.4-inch MIP display, Power Sapphire lens
Preloaded road and trail maps
LED flashlight with white and red light
Garmin ECG app
Grade-adjusted pace workouts and stamina curve
64 GB storage, 10 ATM

Where the specs put it ahead

80 hours in normal activity mode is longer than any fēnix 9 size
Only 66 g with the band, lighter than the 51 mm fēnix 9 by a wide margin
Solar can stretch smartwatch use to 90 days
Maps, flashlight and ECG app match the fēnix 9 feature set
Grade-adjusted pace targets help on hilly courses
The flashlight has a red mode for keeping night vision on overnight efforts

What it gives up

MIP screen is dimmer and less colorful than AMOLED
One 51 mm size, large on small wrists
No inReach satellite messaging; that needs a fēnix 9 Pro
Garmin's store page showed no add-to-cart on launch day

The two lists above are drawn from the maker’s own pages and prices, not from owner reports. Where owner discussion has been read it appears in its own section below, so the two are never mistaken for each other.