Sleep Tech research

Oura Ring 4: Specifications, Sources, and Buying Context

Oura Ring 4 specifications, source notes, and buying context based on published product information.

Written by BenchPicked Editorial Team · Sources checked May 16, 2026

BenchPicked research desk with product comparison charts and source notes
BenchPicked decision research: published facts, constraints, alternatives, and source records.

Decision answer

Bottom line

Consider Oura Ring 4 when its documented Category: sleep technology product; Model: Ring 4; Battery Life: up to 8 days match the intended use. Compare another option when a required capacity, compatibility, recurring cost or return condition is missing or does not fit.

For
people comparing consumer sleep tracking without treating a wellness device as medical equipment
Decision
decide whether Oura Ring 4 fits the intended job and purchase constraints
Context
balancing comfort, sensors, charging, subscription cost and data access

Decision matrix

Read each published value in the context of the decision it can actually support.

Oura Ring 4 decision matrix
FactorPublished informationHow to use it
Categorysleep technology productUse the exact published value to compare like-for-like products; an omitted value remains unknown.
ModelRing 4Use the exact published value to compare like-for-like products; an omitted value remains unknown.
Battery Lifeup to 8 daysThis determines installation, charging and whether the product can finish the intended session.
Subscription Requiredyes for full app featuresInclude recurring charges and required accessories when comparing ownership cost.
Subscription Cost$5.99/moInclude recurring charges and required accessories when comparing ownership cost.
Dimensionsring sizes 4-15Check this against the installation, storage or carrying constraint before ordering.
Weight3.3-5.2 gCheck this against the installation, storage or carrying constraint before ordering.

Claim and evidence record

When another option is the better fit

A non-wearable tracker

Choose this when wearing a ring or watch overnight disrupts sleep or charging routines.

A simpler wearable

Choose this when trend tracking matters more than advanced scoring or coaching.

No new device

Choose this when the purchase would not change a specific sleep habit or decision.

Published specs

Source-attributed specification table
FieldValueSource basis
Battery Lifeup to 8 daysSource Attributed
BrandOuraSource Attributed
Categorysleep technology productSource Attributed
Compatible PlatformsiOS, AndroidSource Attributed
ConnectivityBluetoothSource Attributed
Data Exportmember data export availableSource Attributed
Dimensionsring sizes 4-15Source Attributed
Form FactorringSource Attributed
Hrv TrackingyesSource Attributed
ModelRing 4Source Attributed
Price Range$$$Source Attributed
Primary SensorsPPG optical heart rate, skin temperature, 3D accelerometerSource Attributed
Skin TemperatureyesSource Attributed
Sleep StagesyesSource Attributed
Spo2 TrackingyesSource Attributed
Subscription Cost$5.99/moSource Attributed
Subscription Requiredyes for full app featuresSource Attributed
Water Resistance100mSource Attributed
Weight3.3-5.2 gSource Attributed

Source notes

Questions

What sensors are listed for Oura Ring 4?

The selected sources list these product signals or controls for Oura Ring 4: PPG optical heart rate, skin temperature, 3D accelerometer.

What battery or power setup does Oura Ring 4 use?

The selected sources list battery or power information for Oura Ring 4 as up to 8 days.

Does Oura Ring 4 require a subscription?

The selected sources list subscription status as yes for full app features; subscription cost is listed as $5.99/mo.

What platforms are compatible with Oura Ring 4?

The selected sources list compatible platforms as iOS, Android.

How BenchPicked separates published facts, analysis, and evidence limits